./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:42:35,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:42:35,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:42:35,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:42:35,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:42:35,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:42:35,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:42:35,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:42:35,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:42:35,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:42:35,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:42:35,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:42:35,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:42:35,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:42:35,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:42:35,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:42:35,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:42:35,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:42:35,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:42:35,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:42:35,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:42:35,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:42:35,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:42:35,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:42:35,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:42:35,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:42:35,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:42:35,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:42:35,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:42:35,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:42:35,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:42:35,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:42:35,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:42:35,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:42:35,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:42:35,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:42:35,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:42:35,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:42:35,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:42:35,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:42:35,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:42:35,919 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:42:35,962 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:42:35,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:42:35,964 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:42:35,965 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:42:35,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:42:35,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:42:35,967 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:42:35,967 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:42:35,967 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:42:35,968 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:42:35,969 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:42:35,969 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:42:35,970 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:42:35,970 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:42:35,970 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:42:35,971 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:42:35,971 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:42:35,971 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:42:35,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:42:35,973 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:42:35,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:42:35,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:42:35,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:42:35,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:42:35,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:42:35,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:42:35,975 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:42:35,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:42:35,976 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:42:35,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:42:35,976 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:42:35,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:42:35,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:42:35,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:42:35,978 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:42:35,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:42:35,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:42:35,979 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:42:35,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:42:35,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:42:35,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:42:35,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2022-11-25 23:42:36,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:42:36,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:42:36,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:42:36,418 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:42:36,418 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:42:36,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-11-25 23:42:40,174 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:42:40,526 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:42:40,527 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-11-25 23:42:40,537 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/data/5a2869b91/95658997fc63494296d5ecd31abc6be2/FLAG2cf0c339c [2022-11-25 23:42:40,557 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/data/5a2869b91/95658997fc63494296d5ecd31abc6be2 [2022-11-25 23:42:40,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:42:40,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:42:40,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:42:40,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:42:40,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:42:40,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:42:40" (1/1) ... [2022-11-25 23:42:40,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@91dbecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40, skipping insertion in model container [2022-11-25 23:42:40,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:42:40" (1/1) ... [2022-11-25 23:42:40,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:42:40,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:42:40,830 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_0874911a-cfaa-446c-800f-c5f24b397b8d/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-11-25 23:42:40,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:42:40,917 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:42:40,932 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_0874911a-cfaa-446c-800f-c5f24b397b8d/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-11-25 23:42:40,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:42:40,991 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:42:40,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40 WrapperNode [2022-11-25 23:42:40,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:42:40,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:42:40,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:42:40,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:42:41,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40" (1/1) ... [2022-11-25 23:42:41,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40" (1/1) ... [2022-11-25 23:42:41,040 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 53 [2022-11-25 23:42:41,041 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:42:41,042 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:42:41,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:42:41,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:42:41,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40" (1/1) ... [2022-11-25 23:42:41,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40" (1/1) ... [2022-11-25 23:42:41,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40" (1/1) ... [2022-11-25 23:42:41,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40" (1/1) ... [2022-11-25 23:42:41,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40" (1/1) ... [2022-11-25 23:42:41,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40" (1/1) ... [2022-11-25 23:42:41,112 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40" (1/1) ... [2022-11-25 23:42:41,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40" (1/1) ... [2022-11-25 23:42:41,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:42:41,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:42:41,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:42:41,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:42:41,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40" (1/1) ... [2022-11-25 23:42:41,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:42:41,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:42:41,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:42:41,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:42:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:42:41,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:42:41,233 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-25 23:42:41,233 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-25 23:42:41,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:42:41,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:42:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-11-25 23:42:41,234 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-11-25 23:42:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 23:42:41,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 23:42:41,394 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:42:41,399 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:42:41,933 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:42:42,407 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:42:42,408 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 23:42:42,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:42:42 BoogieIcfgContainer [2022-11-25 23:42:42,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:42:42,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:42:42,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:42:42,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:42:42,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:42:40" (1/3) ... [2022-11-25 23:42:42,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@754449c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:42:42, skipping insertion in model container [2022-11-25 23:42:42,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:42:40" (2/3) ... [2022-11-25 23:42:42,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@754449c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:42:42, skipping insertion in model container [2022-11-25 23:42:42,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:42:42" (3/3) ... [2022-11-25 23:42:42,427 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2022-11-25 23:42:42,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:42:42,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:42:42,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:42:42,547 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;@6debc271, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:42:42,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:42:42,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 31 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 23:42:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-25 23:42:42,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:42,568 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:42:42,569 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:42,580 INFO L85 PathProgramCache]: Analyzing trace with hash 911912301, now seen corresponding path program 1 times [2022-11-25 23:42:42,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:42,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660453588] [2022-11-25 23:42:42,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:42,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:42:43,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:43,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660453588] [2022-11-25 23:42:43,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660453588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:43,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:43,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 23:42:43,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318491418] [2022-11-25 23:42:43,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:43,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 23:42:43,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 23:42:43,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:42:43,840 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 31 states have internal predecessors, (44), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 23:42:44,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:44,220 INFO L93 Difference]: Finished difference Result 108 states and 164 transitions. [2022-11-25 23:42:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:42:44,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-11-25 23:42:44,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:44,245 INFO L225 Difference]: With dead ends: 108 [2022-11-25 23:42:44,246 INFO L226 Difference]: Without dead ends: 61 [2022-11-25 23:42:44,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:42:44,260 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 16 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:44,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 322 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:42:44,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-25 23:42:44,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2022-11-25 23:42:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-25 23:42:44,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2022-11-25 23:42:44,348 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 26 [2022-11-25 23:42:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:44,351 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2022-11-25 23:42:44,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 23:42:44,352 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2022-11-25 23:42:44,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:42:44,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:44,358 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:42:44,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:42:44,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:44,361 INFO L85 PathProgramCache]: Analyzing trace with hash -607868578, now seen corresponding path program 1 times [2022-11-25 23:42:44,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:44,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720084687] [2022-11-25 23:42:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:44,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:42:45,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:45,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720084687] [2022-11-25 23:42:45,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720084687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:42:45,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080498761] [2022-11-25 23:42:45,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:45,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:42:45,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:42:45,083 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:42:45,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:42:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:45,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:42:45,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:42:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:42:45,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:42:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:42:45,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080498761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:42:45,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [601424069] [2022-11-25 23:42:45,978 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:42:45,980 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:42:45,985 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:42:45,996 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:42:45,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:42:46,435 INFO L197 IcfgInterpreter]: Interpreting procedure addflt with input of size 36 for LOIs [2022-11-25 23:42:46,923 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2022-11-25 23:42:47,003 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 60 for LOIs [2022-11-25 23:42:47,332 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:42:52,782 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '477#(and (= (select |#length| 3) 12) (= (select |#length| 2) 24) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:42:52,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:42:52,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:42:52,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 15 [2022-11-25 23:42:52,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998055258] [2022-11-25 23:42:52,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:42:52,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:42:52,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:52,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:42:52,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-11-25 23:42:52,786 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:42:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:53,319 INFO L93 Difference]: Finished difference Result 134 states and 185 transitions. [2022-11-25 23:42:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 23:42:53,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-11-25 23:42:53,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:53,326 INFO L225 Difference]: With dead ends: 134 [2022-11-25 23:42:53,326 INFO L226 Difference]: Without dead ends: 83 [2022-11-25 23:42:53,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:42:53,333 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:53,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 382 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:42:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-25 23:42:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2022-11-25 23:42:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-25 23:42:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2022-11-25 23:42:53,368 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 30 [2022-11-25 23:42:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:53,369 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2022-11-25 23:42:53,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:42:53,370 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2022-11-25 23:42:53,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 23:42:53,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:53,374 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:42:53,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 23:42:53,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:42:53,581 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:53,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:53,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1773969378, now seen corresponding path program 2 times [2022-11-25 23:42:53,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:53,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857813079] [2022-11-25 23:42:53,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:53,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:42:53,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:53,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857813079] [2022-11-25 23:42:53,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857813079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:53,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:53,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 23:42:53,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969799534] [2022-11-25 23:42:53,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:53,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:42:53,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:53,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:42:53,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:42:53,978 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 23:42:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:54,143 INFO L93 Difference]: Finished difference Result 98 states and 125 transitions. [2022-11-25 23:42:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:42:54,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-11-25 23:42:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:54,150 INFO L225 Difference]: With dead ends: 98 [2022-11-25 23:42:54,151 INFO L226 Difference]: Without dead ends: 77 [2022-11-25 23:42:54,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:42:54,155 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:54,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 296 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:42:54,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-25 23:42:54,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-11-25 23:42:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-25 23:42:54,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2022-11-25 23:42:54,171 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 30 [2022-11-25 23:42:54,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:54,171 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2022-11-25 23:42:54,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 23:42:54,172 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2022-11-25 23:42:54,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 23:42:54,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:54,174 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:42:54,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:42:54,175 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:54,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:54,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1554793101, now seen corresponding path program 1 times [2022-11-25 23:42:54,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:54,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833251275] [2022-11-25 23:42:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:54,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:42:55,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:42:55,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833251275] [2022-11-25 23:42:55,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833251275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:42:55,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:42:55,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-25 23:42:55,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214040132] [2022-11-25 23:42:55,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:42:55,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:42:55,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:42:55,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:42:55,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:42:55,114 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 20 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 23:42:55,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:55,584 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2022-11-25 23:42:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 23:42:55,585 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 35 [2022-11-25 23:42:55,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:55,586 INFO L225 Difference]: With dead ends: 83 [2022-11-25 23:42:55,586 INFO L226 Difference]: Without dead ends: 63 [2022-11-25 23:42:55,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:42:55,588 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:55,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 517 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:42:55,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-25 23:42:55,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-11-25 23:42:55,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 40 states have internal predecessors, (49), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (13), 9 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-25 23:42:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-11-25 23:42:55,609 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 35 [2022-11-25 23:42:55,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:55,611 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-11-25 23:42:55,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 23:42:55,611 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-11-25 23:42:55,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-25 23:42:55,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:55,623 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:42:55,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:42:55,624 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:42:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:55,625 INFO L85 PathProgramCache]: Analyzing trace with hash -574448753, now seen corresponding path program 3 times [2022-11-25 23:42:55,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:42:55,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614798824] [2022-11-25 23:42:55,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:55,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:42:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:42:55,749 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 23:42:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 23:42:55,882 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-25 23:42:55,882 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 23:42:55,884 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 23:42:55,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:42:55,891 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-11-25 23:42:55,895 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 23:42:55,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 11:42:55 BoogieIcfgContainer [2022-11-25 23:42:55,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 23:42:55,949 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 23:42:55,949 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 23:42:55,950 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 23:42:55,951 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:42:42" (3/4) ... [2022-11-25 23:42:55,955 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 23:42:55,956 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 23:42:55,956 INFO L158 Benchmark]: Toolchain (without parser) took 15394.40ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 116.9MB in the beginning and 55.7MB in the end (delta: 61.2MB). Peak memory consumption was 94.3MB. Max. memory is 16.1GB. [2022-11-25 23:42:55,957 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 117.4MB. Free memory is still 65.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:42:55,960 INFO L158 Benchmark]: CACSL2BoogieTranslator took 428.39ms. Allocated memory is still 148.9MB. Free memory was 116.6MB in the beginning and 103.4MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-25 23:42:55,962 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.79ms. Allocated memory is still 148.9MB. Free memory was 103.4MB in the beginning and 101.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:42:55,962 INFO L158 Benchmark]: Boogie Preprocessor took 75.44ms. Allocated memory is still 148.9MB. Free memory was 101.9MB in the beginning and 100.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:42:55,963 INFO L158 Benchmark]: RCFGBuilder took 1293.38ms. Allocated memory is still 148.9MB. Free memory was 99.9MB in the beginning and 108.4MB in the end (delta: -8.4MB). Peak memory consumption was 34.7MB. Max. memory is 16.1GB. [2022-11-25 23:42:55,965 INFO L158 Benchmark]: TraceAbstraction took 13534.18ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 107.7MB in the beginning and 55.7MB in the end (delta: 52.0MB). Peak memory consumption was 84.8MB. Max. memory is 16.1GB. [2022-11-25 23:42:55,966 INFO L158 Benchmark]: Witness Printer took 6.75ms. Allocated memory is still 180.4MB. Free memory is still 55.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:42:55,969 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 117.4MB. Free memory is still 65.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 428.39ms. Allocated memory is still 148.9MB. Free memory was 116.6MB in the beginning and 103.4MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.79ms. Allocated memory is still 148.9MB. Free memory was 103.4MB in the beginning and 101.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 75.44ms. Allocated memory is still 148.9MB. Free memory was 101.9MB in the beginning and 100.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1293.38ms. Allocated memory is still 148.9MB. Free memory was 99.9MB in the beginning and 108.4MB in the end (delta: -8.4MB). Peak memory consumption was 34.7MB. Max. memory is 16.1GB. * TraceAbstraction took 13534.18ms. Allocated memory was 148.9MB in the beginning and 180.4MB in the end (delta: 31.5MB). Free memory was 107.7MB in the beginning and 55.7MB in the end (delta: 52.0MB). Peak memory consumption was 84.8MB. Max. memory is 16.1GB. * Witness Printer took 6.75ms. Allocated memory is still 180.4MB. Free memory is still 55.7MB. 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: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 111, overapproximation of bitwiseAnd at line 109, overapproximation of bitwiseComplement at line 77. Possible FailurePath: [L227] unsigned int a ; [L228] unsigned int ma = __VERIFIER_nondet_uint(); [L229] signed char ea = __VERIFIER_nondet_char(); [L230] unsigned int b ; [L231] unsigned int mb = __VERIFIER_nondet_uint(); [L232] signed char eb = __VERIFIER_nondet_char(); [L233] unsigned int r_add1 ; [L234] unsigned int r_add2 ; [L235] unsigned int zero ; [L236] int tmp ; [L237] int tmp___0 ; [L238] int __retres14 ; VAL [ea=-126, eb=127] [L242] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L30] COND TRUE ! m [L31] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L81] return (__retres4); [L242] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=-126, eb=127] [L242] zero = base2flt(0, 0) [L243] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=-126, \old(m)=16777216] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L30] COND FALSE !(! m) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L58] COND TRUE 1 VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=-126, \old(m)=16777216, e=-126, m=16777216] [L77] m = m & ~ (1U << 24U) [L78] res = m | ((unsigned int )(e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=-126, \old(m)=16777216, __retres4=33554432, e=-126, m=0, res=33554432] [L81] return (__retres4); [L243] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=33554432, ea=-126, eb=127, ma=16777216, zero=0] [L243] a = base2flt(ma, ea) [L244] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=127, \old(m)=33554431] [L26] unsigned int res ; [L27] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L30] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L36] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L58] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L60] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=127, \old(m)=33554431, e=127, m=33554431] [L77] m = m & ~ (1U << 24U) [L78] res = m | ((unsigned int )(e + 128) << 24U) [L79] __retres4 = res VAL [\old(e)=127, \old(m)=33554431, __retres4=16777214, e=127, m=33554430, res=16777214] [L81] return (__retres4); [L244] RET, EXPR base2flt(mb, eb) VAL [a=33554432, base2flt(mb, eb)=4311744510, ea=-126, eb=127, ma=16777216, mb=33554431, zero=0] [L244] b = base2flt(mb, eb) [L245] CALL addflt(a, b) VAL [\old(a)=33554432, \old(b)=16777214] [L85] unsigned int res ; [L86] unsigned int ma ; [L87] unsigned int mb ; [L88] unsigned int delta ; [L89] int ea ; [L90] int eb ; [L91] unsigned int tmp ; [L92] unsigned int __retres10 ; [L95] COND FALSE !(a < b) VAL [\old(a)=33554432, \old(b)=16777214, a=33554432, b=16777214, tmp=33554432] [L102] COND FALSE !(! b) [L109] ma = a & ((1U << 24U) - 1U) [L110] ea = (int )(a >> 24U) - 128 [L111] ma = ma | (1U << 24U) [L112] mb = b & ((1U << 24U) - 1U) [L113] eb = (int )(b >> 24U) - 128 [L114] mb = mb | (1U << 24U) VAL [\old(a)=33554432, \old(b)=16777214, a=33554432, b=16777214, ea=-126, eb=128, ma=16777216, mb=16777216, tmp=33554432] [L115] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.4s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 111 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 92 mSDsluCounter, 1517 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1339 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 932 IncrementalHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 178 mSDtfsCounter, 932 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=2, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 42 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 410 SizeOfPredicates, 8 NumberOfNonLiveVariables, 118 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 64/76 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-25 23:42:55,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:42:58,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:42:58,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:42:58,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:42:58,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:42:58,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:42:58,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:42:58,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:42:58,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:42:59,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:42:59,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:42:59,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:42:59,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:42:59,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:42:59,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:42:59,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:42:59,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:42:59,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:42:59,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:42:59,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:42:59,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:42:59,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:42:59,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:42:59,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:42:59,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:42:59,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:42:59,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:42:59,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:42:59,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:42:59,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:42:59,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:42:59,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:42:59,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:42:59,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:42:59,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:42:59,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:42:59,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:42:59,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:42:59,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:42:59,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:42:59,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:42:59,091 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-25 23:42:59,143 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:42:59,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:42:59,146 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:42:59,146 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:42:59,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:42:59,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:42:59,148 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:42:59,148 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:42:59,149 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:42:59,149 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:42:59,150 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:42:59,151 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:42:59,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:42:59,152 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:42:59,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:42:59,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:42:59,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:42:59,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:42:59,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:42:59,154 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:42:59,154 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 23:42:59,154 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 23:42:59,155 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:42:59,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:42:59,155 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:42:59,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:42:59,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:42:59,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 23:42:59,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:42:59,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:42:59,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:42:59,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:42:59,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:42:59,158 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-25 23:42:59,158 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 23:42:59,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:42:59,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:42:59,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 23:42:59,160 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_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2abfa4882ab8ec6bd7a33a5fbeaa8a88ba40a897019218fc162e52833c89454b [2022-11-25 23:42:59,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:42:59,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:42:59,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:42:59,705 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:42:59,706 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:42:59,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-11-25 23:43:03,310 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:43:03,672 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:43:03,673 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c [2022-11-25 23:43:03,682 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/data/c18a1a691/221537f614b8425ea683815e0e4b9161/FLAGea0fcc368 [2022-11-25 23:43:03,701 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/data/c18a1a691/221537f614b8425ea683815e0e4b9161 [2022-11-25 23:43:03,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:43:03,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:43:03,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:43:03,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:43:03,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:43:03,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:43:03" (1/1) ... [2022-11-25 23:43:03,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@124ad097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:03, skipping insertion in model container [2022-11-25 23:43:03,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:43:03" (1/1) ... [2022-11-25 23:43:03,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:43:03,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:43:04,007 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_0874911a-cfaa-446c-800f-c5f24b397b8d/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-11-25 23:43:04,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:43:04,111 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:43:04,129 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_0874911a-cfaa-446c-800f-c5f24b397b8d/sv-benchmarks/c/bitvector/soft_float_4-2a.c.cil.c[755,768] [2022-11-25 23:43:04,163 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:43:04,182 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:43:04,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:04 WrapperNode [2022-11-25 23:43:04,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:43:04,184 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:43:04,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:43:04,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:43:04,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:04" (1/1) ... [2022-11-25 23:43:04,205 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:04" (1/1) ... [2022-11-25 23:43:04,227 INFO L138 Inliner]: procedures = 17, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2022-11-25 23:43:04,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:43:04,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:43:04,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:43:04,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:43:04,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:04" (1/1) ... [2022-11-25 23:43:04,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:04" (1/1) ... [2022-11-25 23:43:04,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:04" (1/1) ... [2022-11-25 23:43:04,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:04" (1/1) ... [2022-11-25 23:43:04,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:04" (1/1) ... [2022-11-25 23:43:04,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:04" (1/1) ... [2022-11-25 23:43:04,271 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:04" (1/1) ... [2022-11-25 23:43:04,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:04" (1/1) ... [2022-11-25 23:43:04,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:43:04,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:43:04,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:43:04,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:43:04,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:04" (1/1) ... [2022-11-25 23:43:04,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:43:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:43:04,341 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:43:04,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:43:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:43:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 23:43:04,410 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-25 23:43:04,411 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-25 23:43:04,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:43:04,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:43:04,411 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2022-11-25 23:43:04,411 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2022-11-25 23:43:04,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 23:43:04,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 23:43:04,558 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:43:04,562 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:43:05,054 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:43:05,062 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:43:05,063 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 23:43:05,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:43:05 BoogieIcfgContainer [2022-11-25 23:43:05,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:43:05,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:43:05,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:43:05,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:43:05,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:43:03" (1/3) ... [2022-11-25 23:43:05,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e67cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:43:05, skipping insertion in model container [2022-11-25 23:43:05,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:43:04" (2/3) ... [2022-11-25 23:43:05,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e67cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:43:05, skipping insertion in model container [2022-11-25 23:43:05,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:43:05" (3/3) ... [2022-11-25 23:43:05,108 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_4-2a.c.cil.c [2022-11-25 23:43:05,133 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:43:05,133 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:43:05,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:43:05,229 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;@5f6865ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:43:05,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:43:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 23:43:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 23:43:05,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:05,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:05,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:05,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2030319843, now seen corresponding path program 1 times [2022-11-25 23:43:05,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:05,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374767717] [2022-11-25 23:43:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:05,284 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 [2022-11-25 23:43:05,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:05,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:43:05,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:43:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:05,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:43:05,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:43:05,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:43:05,746 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:05,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374767717] [2022-11-25 23:43:05,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374767717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:43:05,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:43:05,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 23:43:05,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802950137] [2022-11-25 23:43:05,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:43:05,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:43:05,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:05,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:43:05,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:43:05,807 INFO L87 Difference]: Start difference. First operand has 54 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 42 states have internal predecessors, (61), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 23:43:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:06,091 INFO L93 Difference]: Finished difference Result 130 states and 195 transitions. [2022-11-25 23:43:06,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:43:06,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-11-25 23:43:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:06,109 INFO L225 Difference]: With dead ends: 130 [2022-11-25 23:43:06,110 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 23:43:06,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:43:06,128 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 23 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:06,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 452 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:43:06,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 23:43:06,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-11-25 23:43:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 48 states have internal predecessors, (60), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-25 23:43:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2022-11-25 23:43:06,194 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 31 [2022-11-25 23:43:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:06,195 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2022-11-25 23:43:06,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 23:43:06,196 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2022-11-25 23:43:06,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 23:43:06,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:06,199 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:06,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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)] Ended with exit code 0 [2022-11-25 23:43:06,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:43:06,414 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:06,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:06,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1468368814, now seen corresponding path program 1 times [2022-11-25 23:43:06,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:06,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119264729] [2022-11-25 23:43:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:06,425 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 [2022-11-25 23:43:06,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:06,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:43:06,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:43:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:06,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:43:06,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:43:06,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:43:06,912 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:06,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119264729] [2022-11-25 23:43:06,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119264729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:06,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1955695735] [2022-11-25 23:43:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:06,914 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:43:06,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:43:06,959 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:43:06,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2022-11-25 23:43:07,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:07,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:43:07,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:43:07,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:43:07,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1955695735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:07,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957462057] [2022-11-25 23:43:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:07,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:07,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:43:07,294 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:43:07,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:43:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:07,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:43:07,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:43:07,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:43:07,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957462057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:07,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:43:07,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 9 [2022-11-25 23:43:07,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049619210] [2022-11-25 23:43:07,553 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:43:07,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:43:07,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:07,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:43:07,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:43:07,559 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 23:43:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:07,855 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2022-11-25 23:43:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:43:07,856 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-11-25 23:43:07,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:07,863 INFO L225 Difference]: With dead ends: 121 [2022-11-25 23:43:07,863 INFO L226 Difference]: Without dead ends: 93 [2022-11-25 23:43:07,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-25 23:43:07,874 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 27 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:07,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 484 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:43:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-25 23:43:07,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2022-11-25 23:43:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 10 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-25 23:43:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2022-11-25 23:43:07,908 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 35 [2022-11-25 23:43:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:07,909 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2022-11-25 23:43:07,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 23:43:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2022-11-25 23:43:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 23:43:07,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:07,921 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:07,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:43:08,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:08,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:08,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:08,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:08,537 INFO L85 PathProgramCache]: Analyzing trace with hash -686479404, now seen corresponding path program 1 times [2022-11-25 23:43:08,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:08,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882356781] [2022-11-25 23:43:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:08,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:43:08,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:08,541 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:43:08,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:43:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:08,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:43:08,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:43:08,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:43:08,849 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:08,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882356781] [2022-11-25 23:43:08,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882356781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:08,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [333514953] [2022-11-25 23:43:08,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:08,850 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:43:08,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:43:08,856 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:43:08,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-25 23:43:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:08,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:43:08,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 23:43:09,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:43:09,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [333514953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:43:09,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:43:09,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 12 [2022-11-25 23:43:09,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309899174] [2022-11-25 23:43:09,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:43:09,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:43:09,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:09,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:43:09,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:43:09,108 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:43:09,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:09,358 INFO L93 Difference]: Finished difference Result 114 states and 148 transitions. [2022-11-25 23:43:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:43:09,359 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-11-25 23:43:09,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:09,362 INFO L225 Difference]: With dead ends: 114 [2022-11-25 23:43:09,362 INFO L226 Difference]: Without dead ends: 91 [2022-11-25 23:43:09,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:43:09,365 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 20 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:09,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 508 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:43:09,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-25 23:43:09,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2022-11-25 23:43:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.271186440677966) internal successors, (75), 61 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-25 23:43:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-11-25 23:43:09,388 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2022-11-25 23:43:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:09,393 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-11-25 23:43:09,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:43:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-11-25 23:43:09,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 23:43:09,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:09,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:09,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:43:09,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:09,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:43:09,812 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:09,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:09,813 INFO L85 PathProgramCache]: Analyzing trace with hash 461161469, now seen corresponding path program 2 times [2022-11-25 23:43:09,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:09,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420799646] [2022-11-25 23:43:09,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:43:09,814 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 [2022-11-25 23:43:09,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:09,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:43:09,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:43:09,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 23:43:09,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:43:09,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:43:09,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 23:43:10,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:43:10,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:10,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420799646] [2022-11-25 23:43:10,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420799646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:43:10,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:43:10,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:43:10,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488553418] [2022-11-25 23:43:10,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:43:10,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:43:10,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:10,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:43:10,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:43:10,096 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 23:43:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:11,859 INFO L93 Difference]: Finished difference Result 109 states and 139 transitions. [2022-11-25 23:43:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:43:11,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-11-25 23:43:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:11,864 INFO L225 Difference]: With dead ends: 109 [2022-11-25 23:43:11,864 INFO L226 Difference]: Without dead ends: 107 [2022-11-25 23:43:11,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:43:11,865 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 30 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:11,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 330 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-25 23:43:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-25 23:43:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2022-11-25 23:43:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 66 states have internal predecessors, (80), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-25 23:43:11,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2022-11-25 23:43:11,885 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 39 [2022-11-25 23:43:11,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:11,886 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2022-11-25 23:43:11,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 23:43:11,886 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2022-11-25 23:43:11,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 23:43:11,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:11,888 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:11,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:43:12,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:43:12,114 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:12,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:12,115 INFO L85 PathProgramCache]: Analyzing trace with hash 518419771, now seen corresponding path program 1 times [2022-11-25 23:43:12,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:12,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74858954] [2022-11-25 23:43:12,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:12,115 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 [2022-11-25 23:43:12,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:12,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:43:12,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 23:43:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:12,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:43:12,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 23:43:12,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:43:12,340 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:12,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74858954] [2022-11-25 23:43:12,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74858954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:43:12,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:43:12,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:43:12,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860689439] [2022-11-25 23:43:12,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:43:12,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:43:12,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:12,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:43:12,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:43:12,343 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 23:43:14,550 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] [2022-11-25 23:43:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:14,640 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2022-11-25 23:43:14,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:43:14,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-11-25 23:43:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:14,643 INFO L225 Difference]: With dead ends: 96 [2022-11-25 23:43:14,643 INFO L226 Difference]: Without dead ends: 94 [2022-11-25 23:43:14,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:43:14,645 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 31 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:14,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 290 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-25 23:43:14,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-25 23:43:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2022-11-25 23:43:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 64 states have internal predecessors, (78), 12 states have call successors, (12), 7 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-25 23:43:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2022-11-25 23:43:14,662 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 39 [2022-11-25 23:43:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:14,663 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2022-11-25 23:43:14,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 23:43:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2022-11-25 23:43:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 23:43:14,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:14,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:14,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:14,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:43:14,879 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:14,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1863687100, now seen corresponding path program 1 times [2022-11-25 23:43:14,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:14,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814598258] [2022-11-25 23:43:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:14,880 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 [2022-11-25 23:43:14,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:14,883 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:43:14,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:43:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:14,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:43:14,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:15,091 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:43:15,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:43:15,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:15,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814598258] [2022-11-25 23:43:15,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814598258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:15,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [879835682] [2022-11-25 23:43:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:15,261 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:43:15,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:43:15,264 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:43:15,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-25 23:43:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:15,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:43:15,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:43:15,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:43:15,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [879835682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:15,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938988127] [2022-11-25 23:43:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:15,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:15,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:43:15,567 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:43:15,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:43:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:15,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 23:43:15,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:43:15,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:43:15,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938988127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:15,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:43:15,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 9 [2022-11-25 23:43:15,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391176552] [2022-11-25 23:43:15,859 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:43:15,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:43:15,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:15,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:43:15,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:43:15,863 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:43:16,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:16,103 INFO L93 Difference]: Finished difference Result 129 states and 168 transitions. [2022-11-25 23:43:16,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:43:16,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-11-25 23:43:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:16,105 INFO L225 Difference]: With dead ends: 129 [2022-11-25 23:43:16,105 INFO L226 Difference]: Without dead ends: 118 [2022-11-25 23:43:16,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:43:16,107 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 50 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:16,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 439 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:43:16,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-25 23:43:16,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2022-11-25 23:43:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2022-11-25 23:43:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2022-11-25 23:43:16,168 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 44 [2022-11-25 23:43:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:16,171 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2022-11-25 23:43:16,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:43:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2022-11-25 23:43:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 23:43:16,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:16,178 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:16,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:16,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:16,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:43:16,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:43:16,781 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:16,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:16,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1162622522, now seen corresponding path program 1 times [2022-11-25 23:43:16,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:16,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840621052] [2022-11-25 23:43:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:16,783 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 [2022-11-25 23:43:16,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:16,784 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:43:16,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 23:43:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:16,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:43:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:43:17,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:43:17,031 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:17,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840621052] [2022-11-25 23:43:17,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840621052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:43:17,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:43:17,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 23:43:17,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59941090] [2022-11-25 23:43:17,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:43:17,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 23:43:17,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:17,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 23:43:17,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:43:17,033 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:43:17,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:17,446 INFO L93 Difference]: Finished difference Result 133 states and 170 transitions. [2022-11-25 23:43:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:43:17,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-11-25 23:43:17,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:17,449 INFO L225 Difference]: With dead ends: 133 [2022-11-25 23:43:17,449 INFO L226 Difference]: Without dead ends: 126 [2022-11-25 23:43:17,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:43:17,451 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 35 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:17,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 643 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:43:17,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-25 23:43:17,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2022-11-25 23:43:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 76 states have internal predecessors, (90), 15 states have call successors, (15), 7 states have call predecessors, (15), 10 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2022-11-25 23:43:17,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2022-11-25 23:43:17,483 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 44 [2022-11-25 23:43:17,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:17,484 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2022-11-25 23:43:17,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:43:17,484 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2022-11-25 23:43:17,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 23:43:17,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:17,486 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:17,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:17,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:43:17,699 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:17,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:17,700 INFO L85 PathProgramCache]: Analyzing trace with hash -977013140, now seen corresponding path program 1 times [2022-11-25 23:43:17,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:17,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358680724] [2022-11-25 23:43:17,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:17,700 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 [2022-11-25 23:43:17,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:17,701 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:43:17,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 23:43:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:17,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:43:17,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:43:17,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:43:18,198 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:18,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358680724] [2022-11-25 23:43:18,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358680724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:18,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [549060755] [2022-11-25 23:43:18,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:18,199 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:43:18,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:43:18,204 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:43:18,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-25 23:43:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:18,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:43:18,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:18,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:18,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [549060755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:18,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832952091] [2022-11-25 23:43:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:18,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:18,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:43:18,820 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:43:18,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 23:43:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:18,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:43:18,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:43:18,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:43:19,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832952091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:19,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:43:19,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 11, 11] total 21 [2022-11-25 23:43:19,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705558279] [2022-11-25 23:43:19,151 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:43:19,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 23:43:19,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:19,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 23:43:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:43:19,153 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-25 23:43:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:20,131 INFO L93 Difference]: Finished difference Result 177 states and 229 transitions. [2022-11-25 23:43:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:43:20,132 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 46 [2022-11-25 23:43:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:20,134 INFO L225 Difference]: With dead ends: 177 [2022-11-25 23:43:20,134 INFO L226 Difference]: Without dead ends: 148 [2022-11-25 23:43:20,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:43:20,136 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 98 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:20,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 968 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:43:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-25 23:43:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 123. [2022-11-25 23:43:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 92 states have (on average 1.2065217391304348) internal successors, (111), 94 states have internal predecessors, (111), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (29), 19 states have call predecessors, (29), 17 states have call successors, (29) [2022-11-25 23:43:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 158 transitions. [2022-11-25 23:43:20,172 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 158 transitions. Word has length 46 [2022-11-25 23:43:20,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:20,173 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 158 transitions. [2022-11-25 23:43:20,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 6 states have call successors, (10), 2 states have call predecessors, (10), 5 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-25 23:43:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 158 transitions. [2022-11-25 23:43:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 23:43:20,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:20,175 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:20,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:20,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:20,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:20,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:43:20,784 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:20,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:20,785 INFO L85 PathProgramCache]: Analyzing trace with hash -919754838, now seen corresponding path program 1 times [2022-11-25 23:43:20,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:20,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174615489] [2022-11-25 23:43:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:20,785 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 [2022-11-25 23:43:20,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:20,787 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:43:20,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:43:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:20,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:43:20,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:43:20,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:43:20,920 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:20,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174615489] [2022-11-25 23:43:20,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174615489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:43:20,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:43:20,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 23:43:20,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079527014] [2022-11-25 23:43:20,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:43:20,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:43:20,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:20,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:43:20,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:43:20,922 INFO L87 Difference]: Start difference. First operand 123 states and 158 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 23:43:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:21,003 INFO L93 Difference]: Finished difference Result 131 states and 165 transitions. [2022-11-25 23:43:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:43:21,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2022-11-25 23:43:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:21,007 INFO L225 Difference]: With dead ends: 131 [2022-11-25 23:43:21,007 INFO L226 Difference]: Without dead ends: 110 [2022-11-25 23:43:21,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:43:21,011 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:21,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 309 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:43:21,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-25 23:43:21,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-11-25 23:43:21,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 85 states have internal predecessors, (98), 16 states have call successors, (16), 8 states have call predecessors, (16), 11 states have return successors, (25), 16 states have call predecessors, (25), 15 states have call successors, (25) [2022-11-25 23:43:21,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 139 transitions. [2022-11-25 23:43:21,040 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 139 transitions. Word has length 46 [2022-11-25 23:43:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:21,041 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 139 transitions. [2022-11-25 23:43:21,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 23:43:21,041 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 139 transitions. [2022-11-25 23:43:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 23:43:21,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:21,044 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:21,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-25 23:43:21,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:43:21,258 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:21,258 INFO L85 PathProgramCache]: Analyzing trace with hash -168643793, now seen corresponding path program 1 times [2022-11-25 23:43:21,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:21,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213166850] [2022-11-25 23:43:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:21,259 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 [2022-11-25 23:43:21,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:21,261 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:43:21,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 23:43:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:21,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:43:21,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:21,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:22,252 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:22,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213166850] [2022-11-25 23:43:22,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213166850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:22,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [853798049] [2022-11-25 23:43:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:22,253 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:43:22,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:43:22,255 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:43:22,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-25 23:43:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:22,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:43:22,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:22,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:22,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [853798049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:22,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841597353] [2022-11-25 23:43:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:22,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:22,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:43:22,607 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:43:22,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 23:43:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:22,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:43:22,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:22,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:22,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841597353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:22,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:43:22,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2022-11-25 23:43:22,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620724613] [2022-11-25 23:43:22,936 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:43:22,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 23:43:22,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:22,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 23:43:22,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:43:22,938 INFO L87 Difference]: Start difference. First operand 110 states and 139 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 23:43:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:24,760 INFO L93 Difference]: Finished difference Result 156 states and 213 transitions. [2022-11-25 23:43:24,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:43:24,762 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2022-11-25 23:43:24,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:24,764 INFO L225 Difference]: With dead ends: 156 [2022-11-25 23:43:24,764 INFO L226 Difference]: Without dead ends: 122 [2022-11-25 23:43:24,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 23:43:24,767 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 143 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:24,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1137 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:43:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-25 23:43:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2022-11-25 23:43:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 78 states have internal predecessors, (88), 14 states have call successors, (14), 6 states have call predecessors, (14), 11 states have return successors, (32), 14 states have call predecessors, (32), 13 states have call successors, (32) [2022-11-25 23:43:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2022-11-25 23:43:24,808 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 48 [2022-11-25 23:43:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:24,809 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2022-11-25 23:43:24,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 23:43:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2022-11-25 23:43:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 23:43:24,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:24,811 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:24,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:25,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:25,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:25,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:25,422 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:25,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:25,423 INFO L85 PathProgramCache]: Analyzing trace with hash 291178745, now seen corresponding path program 2 times [2022-11-25 23:43:25,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:25,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782686286] [2022-11-25 23:43:25,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:43:25,423 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 [2022-11-25 23:43:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:25,426 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:43:25,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 23:43:25,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:43:25,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:43:25,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:43:25,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:25,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:26,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:26,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782686286] [2022-11-25 23:43:26,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782686286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:26,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1329335919] [2022-11-25 23:43:26,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:43:26,379 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:43:26,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:43:26,384 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:43:26,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-25 23:43:26,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:43:26,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:43:26,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:43:26,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:26,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:26,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1329335919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:26,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571589975] [2022-11-25 23:43:26,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:43:26,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:26,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:43:26,740 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:43:26,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 23:43:26,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:43:26,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:43:26,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:43:26,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:26,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:26,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:43:27,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571589975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:27,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:43:27,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2022-11-25 23:43:27,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116643985] [2022-11-25 23:43:27,077 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:43:27,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 23:43:27,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:27,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 23:43:27,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:43:27,080 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 23:43:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:29,007 INFO L93 Difference]: Finished difference Result 137 states and 186 transitions. [2022-11-25 23:43:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 23:43:29,016 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2022-11-25 23:43:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:29,017 INFO L225 Difference]: With dead ends: 137 [2022-11-25 23:43:29,017 INFO L226 Difference]: Without dead ends: 110 [2022-11-25 23:43:29,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 23:43:29,027 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 120 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:29,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1327 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 23:43:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-25 23:43:29,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2022-11-25 23:43:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 66 states have internal predecessors, (76), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-11-25 23:43:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 116 transitions. [2022-11-25 23:43:29,056 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 116 transitions. Word has length 48 [2022-11-25 23:43:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:29,058 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 116 transitions. [2022-11-25 23:43:29,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 4 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 23:43:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 116 transitions. [2022-11-25 23:43:29,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 23:43:29,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:29,060 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:29,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:29,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:29,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-11-25 23:43:29,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:43:29,668 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:29,668 INFO L85 PathProgramCache]: Analyzing trace with hash -744862915, now seen corresponding path program 1 times [2022-11-25 23:43:29,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:29,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529723353] [2022-11-25 23:43:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:29,669 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 [2022-11-25 23:43:29,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:29,671 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:43:29,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-25 23:43:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:29,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:43:29,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 23:43:34,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:43:34,469 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:34,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529723353] [2022-11-25 23:43:34,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529723353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:43:34,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:43:34,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 23:43:34,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450448967] [2022-11-25 23:43:34,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:43:34,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:43:34,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:34,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:43:34,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=36, Unknown=1, NotChecked=0, Total=56 [2022-11-25 23:43:34,471 INFO L87 Difference]: Start difference. First operand 83 states and 116 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:43:36,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:43:38,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:43:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:38,654 INFO L93 Difference]: Finished difference Result 93 states and 129 transitions. [2022-11-25 23:43:38,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:43:38,655 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-11-25 23:43:38,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:38,656 INFO L225 Difference]: With dead ends: 93 [2022-11-25 23:43:38,656 INFO L226 Difference]: Without dead ends: 91 [2022-11-25 23:43:38,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2022-11-25 23:43:38,657 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 18 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:38,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 301 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2022-11-25 23:43:38,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-25 23:43:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2022-11-25 23:43:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.234375) internal successors, (79), 70 states have internal predecessors, (79), 13 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (29), 12 states have call predecessors, (29), 12 states have call successors, (29) [2022-11-25 23:43:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2022-11-25 23:43:38,685 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 49 [2022-11-25 23:43:38,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:38,686 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2022-11-25 23:43:38,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:43:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2022-11-25 23:43:38,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 23:43:38,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:38,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:38,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:38,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:43:38,902 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:43:38,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:38,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1846975685, now seen corresponding path program 1 times [2022-11-25 23:43:38,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:38,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31691245] [2022-11-25 23:43:38,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:43:38,903 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 [2022-11-25 23:43:38,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:38,905 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:43:38,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-25 23:43:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:43:38,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:43:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 23:43:43,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:43:43,500 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31691245] [2022-11-25 23:43:43,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31691245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:43:43,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:43:43,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 23:43:43,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881380510] [2022-11-25 23:43:43,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:43:43,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:43:43,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:43:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2022-11-25 23:43:43,502 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:43:45,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:43:47,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:43:49,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:43:51,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:43:53,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:43:55,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:43:57,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:43:59,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:44:01,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:44:03,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 23:44:05,187 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] [2022-11-25 23:44:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:06,065 INFO L93 Difference]: Finished difference Result 98 states and 133 transitions. [2022-11-25 23:44:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:44:06,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-11-25 23:44:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:06,067 INFO L225 Difference]: With dead ends: 98 [2022-11-25 23:44:06,067 INFO L226 Difference]: Without dead ends: 94 [2022-11-25 23:44:06,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2022-11-25 23:44:06,069 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 15 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:06,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 298 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 10 Unknown, 0 Unchecked, 22.5s Time] [2022-11-25 23:44:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-25 23:44:06,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-11-25 23:44:06,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 67 states have internal predecessors, (77), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (28), 12 states have call predecessors, (28), 11 states have call successors, (28) [2022-11-25 23:44:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2022-11-25 23:44:06,086 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 50 [2022-11-25 23:44:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:06,086 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2022-11-25 23:44:06,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 23:44:06,087 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2022-11-25 23:44:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-25 23:44:06,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:06,088 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:44:06,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:06,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:44:06,302 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:44:06,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:06,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1592416888, now seen corresponding path program 1 times [2022-11-25 23:44:06,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:44:06,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718548378] [2022-11-25 23:44:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:06,303 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 [2022-11-25 23:44:06,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:44:06,304 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:44:06,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:44:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:06,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:44:06,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:06,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:06,642 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:44:06,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718548378] [2022-11-25 23:44:06,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718548378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:06,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [90039045] [2022-11-25 23:44:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:06,642 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:06,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:44:06,647 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:44:06,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-25 23:44:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:06,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:44:06,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:44:06,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:44:06,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [90039045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:44:06,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:44:06,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 14 [2022-11-25 23:44:06,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220337021] [2022-11-25 23:44:06,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:44:06,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:44:06,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:44:06,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:44:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:44:06,886 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:44:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:06,990 INFO L93 Difference]: Finished difference Result 117 states and 175 transitions. [2022-11-25 23:44:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:44:06,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2022-11-25 23:44:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:06,992 INFO L225 Difference]: With dead ends: 117 [2022-11-25 23:44:06,993 INFO L226 Difference]: Without dead ends: 106 [2022-11-25 23:44:06,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-25 23:44:06,994 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 31 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:06,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 280 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:44:06,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-25 23:44:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2022-11-25 23:44:07,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 78 states have internal predecessors, (88), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (44), 15 states have call predecessors, (44), 14 states have call successors, (44) [2022-11-25 23:44:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 147 transitions. [2022-11-25 23:44:07,009 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 147 transitions. Word has length 54 [2022-11-25 23:44:07,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:07,009 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 147 transitions. [2022-11-25 23:44:07,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 23:44:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 147 transitions. [2022-11-25 23:44:07,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-25 23:44:07,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:07,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:44:07,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:44:07,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:07,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:07,422 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:44:07,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:07,423 INFO L85 PathProgramCache]: Analyzing trace with hash 18588658, now seen corresponding path program 1 times [2022-11-25 23:44:07,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:44:07,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813417702] [2022-11-25 23:44:07,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:07,423 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 [2022-11-25 23:44:07,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:44:07,425 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:44:07,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-25 23:44:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:07,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:44:07,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:07,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:07,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:44:07,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813417702] [2022-11-25 23:44:07,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1813417702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:07,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [670882997] [2022-11-25 23:44:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:07,857 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:07,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:44:07,858 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:44:07,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-25 23:44:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:07,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:44:07,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:08,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:08,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [670882997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:08,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743150840] [2022-11-25 23:44:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:08,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:44:08,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:44:08,189 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:44:08,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 23:44:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:08,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:44:08,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:08,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:08,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743150840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:08,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:44:08,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-25 23:44:08,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557295538] [2022-11-25 23:44:08,507 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:44:08,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 23:44:08,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:44:08,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 23:44:08,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:44:08,509 INFO L87 Difference]: Start difference. First operand 99 states and 147 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:44:08,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:08,824 INFO L93 Difference]: Finished difference Result 113 states and 165 transitions. [2022-11-25 23:44:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:44:08,825 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2022-11-25 23:44:08,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:08,826 INFO L225 Difference]: With dead ends: 113 [2022-11-25 23:44:08,826 INFO L226 Difference]: Without dead ends: 102 [2022-11-25 23:44:08,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:44:08,828 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 97 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:08,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 479 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:44:08,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-25 23:44:08,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-25 23:44:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 81 states have internal predecessors, (90), 15 states have call successors, (15), 5 states have call predecessors, (15), 12 states have return successors, (46), 15 states have call predecessors, (46), 14 states have call successors, (46) [2022-11-25 23:44:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 151 transitions. [2022-11-25 23:44:08,849 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 151 transitions. Word has length 63 [2022-11-25 23:44:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:08,849 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 151 transitions. [2022-11-25 23:44:08,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:44:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 151 transitions. [2022-11-25 23:44:08,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-25 23:44:08,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:08,852 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:44:08,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-11-25 23:44:09,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-25 23:44:09,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:09,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:44:09,466 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:44:09,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:09,467 INFO L85 PathProgramCache]: Analyzing trace with hash -177633806, now seen corresponding path program 2 times [2022-11-25 23:44:09,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:44:09,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021660775] [2022-11-25 23:44:09,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:44:09,467 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 [2022-11-25 23:44:09,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:44:09,468 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:44:09,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-25 23:44:09,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:44:09,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:44:09,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:44:09,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:09,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:09,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:44:09,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021660775] [2022-11-25 23:44:09,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021660775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:09,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1249590704] [2022-11-25 23:44:09,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:44:09,834 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:09,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:44:09,835 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:44:09,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-25 23:44:09,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:44:09,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:44:09,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:44:09,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:10,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:10,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1249590704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:10,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986867868] [2022-11-25 23:44:10,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:44:10,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:44:10,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:44:10,149 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:44:10,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 23:44:10,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:44:10,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:44:10,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:44:10,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:10,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:10,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986867868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:10,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:44:10,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-25 23:44:10,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117369882] [2022-11-25 23:44:10,437 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:44:10,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 23:44:10,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:44:10,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 23:44:10,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:44:10,440 INFO L87 Difference]: Start difference. First operand 102 states and 151 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:44:10,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:10,826 INFO L93 Difference]: Finished difference Result 115 states and 169 transitions. [2022-11-25 23:44:10,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:44:10,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 63 [2022-11-25 23:44:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:10,829 INFO L225 Difference]: With dead ends: 115 [2022-11-25 23:44:10,830 INFO L226 Difference]: Without dead ends: 102 [2022-11-25 23:44:10,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:44:10,831 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 70 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:10,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 589 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:44:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-25 23:44:10,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-25 23:44:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 74 states have (on average 1.2162162162162162) internal successors, (90), 81 states have internal predecessors, (90), 15 states have call successors, (15), 5 states have call predecessors, (15), 12 states have return successors, (45), 15 states have call predecessors, (45), 14 states have call successors, (45) [2022-11-25 23:44:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 150 transitions. [2022-11-25 23:44:10,853 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 150 transitions. Word has length 63 [2022-11-25 23:44:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:10,854 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 150 transitions. [2022-11-25 23:44:10,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:44:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 150 transitions. [2022-11-25 23:44:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 23:44:10,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:10,856 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:44:10,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:11,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-25 23:44:11,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-11-25 23:44:11,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:11,464 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:44:11,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:11,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2130957302, now seen corresponding path program 1 times [2022-11-25 23:44:11,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:44:11,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963919903] [2022-11-25 23:44:11,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:11,465 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 [2022-11-25 23:44:11,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:44:11,467 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:44:11,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-25 23:44:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:11,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:44:11,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:11,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:11,940 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:44:11,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963919903] [2022-11-25 23:44:11,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963919903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:11,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [951032665] [2022-11-25 23:44:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:11,941 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:11,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:44:11,942 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:44:11,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-25 23:44:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:12,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:44:12,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:12,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:12,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [951032665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:12,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908803140] [2022-11-25 23:44:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:12,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:44:12,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:44:12,295 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:44:12,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 23:44:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:12,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:44:12,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:12,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:12,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908803140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:12,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:44:12,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-25 23:44:12,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637848304] [2022-11-25 23:44:12,620 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:44:12,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 23:44:12,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:44:12,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 23:44:12,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:44:12,623 INFO L87 Difference]: Start difference. First operand 102 states and 150 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:44:12,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:12,908 INFO L93 Difference]: Finished difference Result 113 states and 161 transitions. [2022-11-25 23:44:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:44:12,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-11-25 23:44:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:12,911 INFO L225 Difference]: With dead ends: 113 [2022-11-25 23:44:12,911 INFO L226 Difference]: Without dead ends: 99 [2022-11-25 23:44:12,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:44:12,913 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 99 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:12,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 399 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:44:12,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-25 23:44:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-25 23:44:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 78 states have internal predecessors, (87), 15 states have call successors, (15), 5 states have call predecessors, (15), 11 states have return successors, (41), 15 states have call predecessors, (41), 14 states have call successors, (41) [2022-11-25 23:44:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 143 transitions. [2022-11-25 23:44:12,933 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 143 transitions. Word has length 65 [2022-11-25 23:44:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:12,934 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 143 transitions. [2022-11-25 23:44:12,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:44:12,934 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 143 transitions. [2022-11-25 23:44:12,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-25 23:44:12,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:12,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:44:12,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:13,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-25 23:44:13,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-11-25 23:44:13,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:13,544 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:44:13,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:13,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1269391674, now seen corresponding path program 2 times [2022-11-25 23:44:13,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:44:13,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2147059446] [2022-11-25 23:44:13,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:44:13,545 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 [2022-11-25 23:44:13,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:44:13,546 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:44:13,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-25 23:44:13,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:44:13,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:44:13,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:44:13,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:13,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:13,976 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:44:13,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2147059446] [2022-11-25 23:44:13,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2147059446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:13,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098080583] [2022-11-25 23:44:13,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:44:13,977 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:13,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:44:13,978 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:44:13,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-25 23:44:14,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:44:14,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:44:14,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:44:14,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:14,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:14,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098080583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:14,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538884613] [2022-11-25 23:44:14,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:44:14,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:44:14,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:44:14,360 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:44:14,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-25 23:44:14,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:44:14,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:44:14,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:44:14,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:14,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 23:44:14,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538884613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:14,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:44:14,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2022-11-25 23:44:14,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458882633] [2022-11-25 23:44:14,675 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:44:14,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 23:44:14,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:44:14,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 23:44:14,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:44:14,677 INFO L87 Difference]: Start difference. First operand 99 states and 143 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:44:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:14,939 INFO L93 Difference]: Finished difference Result 110 states and 154 transitions. [2022-11-25 23:44:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:44:14,940 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 65 [2022-11-25 23:44:14,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:14,941 INFO L225 Difference]: With dead ends: 110 [2022-11-25 23:44:14,941 INFO L226 Difference]: Without dead ends: 96 [2022-11-25 23:44:14,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:44:14,943 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 109 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:14,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 418 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:44:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-25 23:44:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-11-25 23:44:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.2) internal successors, (84), 75 states have internal predecessors, (84), 15 states have call successors, (15), 5 states have call predecessors, (15), 10 states have return successors, (39), 15 states have call predecessors, (39), 14 states have call successors, (39) [2022-11-25 23:44:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 138 transitions. [2022-11-25 23:44:14,961 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 138 transitions. Word has length 65 [2022-11-25 23:44:14,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:14,961 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 138 transitions. [2022-11-25 23:44:14,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 23:44:14,962 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 138 transitions. [2022-11-25 23:44:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 23:44:14,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:14,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:44:14,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:15,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:15,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-25 23:44:15,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:44:15,571 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:44:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1279345645, now seen corresponding path program 1 times [2022-11-25 23:44:15,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:44:15,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17502377] [2022-11-25 23:44:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:15,573 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 [2022-11-25 23:44:15,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:44:15,574 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:44:15,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-25 23:44:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:15,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:44:15,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:16,723 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:44:16,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:44:20,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:44:20,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17502377] [2022-11-25 23:44:20,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17502377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:20,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [626965696] [2022-11-25 23:44:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:20,027 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:20,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:44:20,029 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:44:20,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-25 23:44:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:20,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 23:44:20,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:44:20,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:44:22,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [626965696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:22,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562877604] [2022-11-25 23:44:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:22,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:44:22,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:44:22,518 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:44:22,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-25 23:44:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:44:22,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:44:22,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:44:24,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562877604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:24,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:44:24,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16, 16, 15, 16] total 30 [2022-11-25 23:44:24,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443147436] [2022-11-25 23:44:24,181 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:44:24,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 23:44:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:44:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 23:44:24,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-11-25 23:44:24,183 INFO L87 Difference]: Start difference. First operand 96 states and 138 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-25 23:44:32,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:32,441 INFO L93 Difference]: Finished difference Result 163 states and 228 transitions. [2022-11-25 23:44:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 23:44:32,442 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2022-11-25 23:44:32,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:32,444 INFO L225 Difference]: With dead ends: 163 [2022-11-25 23:44:32,444 INFO L226 Difference]: Without dead ends: 125 [2022-11-25 23:44:32,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 393 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=527, Invalid=2443, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 23:44:32,447 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 251 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:32,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 973 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-25 23:44:32,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-25 23:44:32,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2022-11-25 23:44:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.180722891566265) internal successors, (98), 88 states have internal predecessors, (98), 18 states have call successors, (18), 6 states have call predecessors, (18), 11 states have return successors, (51), 18 states have call predecessors, (51), 17 states have call successors, (51) [2022-11-25 23:44:32,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 167 transitions. [2022-11-25 23:44:32,495 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 167 transitions. Word has length 72 [2022-11-25 23:44:32,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:32,496 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 167 transitions. [2022-11-25 23:44:32,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-25 23:44:32,496 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 167 transitions. [2022-11-25 23:44:32,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 23:44:32,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:32,507 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:44:32,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:32,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:32,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-25 23:44:33,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:44:33,111 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:44:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:33,112 INFO L85 PathProgramCache]: Analyzing trace with hash -784876239, now seen corresponding path program 2 times [2022-11-25 23:44:33,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:44:33,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583788604] [2022-11-25 23:44:33,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:44:33,113 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 [2022-11-25 23:44:33,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:44:33,114 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:44:33,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-25 23:44:33,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:44:33,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:44:33,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:44:33,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:44:34,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:44:37,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:44:37,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583788604] [2022-11-25 23:44:37,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583788604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:37,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [487906377] [2022-11-25 23:44:37,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:44:37,475 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:37,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:44:37,476 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:44:37,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-25 23:44:37,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:44:37,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:44:37,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:44:37,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:37,870 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:44:37,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:44:38,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [487906377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:38,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487952890] [2022-11-25 23:44:38,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:44:38,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:44:38,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:44:38,867 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:44:38,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-25 23:44:38,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:44:38,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:44:38,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:44:38,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:44:39,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:44:40,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487952890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:40,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:44:40,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2022-11-25 23:44:40,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270595798] [2022-11-25 23:44:40,637 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:44:40,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 23:44:40,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:44:40,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 23:44:40,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:44:40,646 INFO L87 Difference]: Start difference. First operand 113 states and 167 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-25 23:44:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:49,453 INFO L93 Difference]: Finished difference Result 182 states and 254 transitions. [2022-11-25 23:44:49,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 23:44:49,455 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 72 [2022-11-25 23:44:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:49,457 INFO L225 Difference]: With dead ends: 182 [2022-11-25 23:44:49,457 INFO L226 Difference]: Without dead ends: 142 [2022-11-25 23:44:49,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 394 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=484, Invalid=2168, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 23:44:49,458 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 270 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:49,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 1001 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-25 23:44:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-25 23:44:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 128. [2022-11-25 23:44:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 95 states have (on average 1.168421052631579) internal successors, (111), 100 states have internal predecessors, (111), 20 states have call successors, (20), 7 states have call predecessors, (20), 12 states have return successors, (53), 20 states have call predecessors, (53), 19 states have call successors, (53) [2022-11-25 23:44:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 184 transitions. [2022-11-25 23:44:49,490 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 184 transitions. Word has length 72 [2022-11-25 23:44:49,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:49,491 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 184 transitions. [2022-11-25 23:44:49,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-25 23:44:49,492 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 184 transitions. [2022-11-25 23:44:49,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 23:44:49,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:49,494 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:44:49,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-25 23:44:49,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-25 23:44:49,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-11-25 23:44:50,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:50,108 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:44:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:50,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1250321149, now seen corresponding path program 1 times [2022-11-25 23:44:50,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:44:50,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792590501] [2022-11-25 23:44:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:50,109 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 [2022-11-25 23:44:50,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:44:50,110 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:44:50,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:44:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:50,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:44:50,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:44:51,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:44:54,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:44:54,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792590501] [2022-11-25 23:44:54,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792590501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:54,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [665969332] [2022-11-25 23:44:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:54,068 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:54,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:44:54,069 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:44:54,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-25 23:44:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:54,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:44:54,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:44:54,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:44:55,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [665969332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:55,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503542136] [2022-11-25 23:44:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:55,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:44:55,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:44:55,878 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:44:55,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-25 23:44:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:55,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:44:55,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:44:56,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:44:57,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503542136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:57,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:44:57,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2022-11-25 23:44:57,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570459132] [2022-11-25 23:44:57,374 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:44:57,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 23:44:57,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:44:57,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 23:44:57,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:44:57,375 INFO L87 Difference]: Start difference. First operand 128 states and 184 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-25 23:45:02,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:02,521 INFO L93 Difference]: Finished difference Result 160 states and 220 transitions. [2022-11-25 23:45:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 23:45:02,523 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2022-11-25 23:45:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:02,524 INFO L225 Difference]: With dead ends: 160 [2022-11-25 23:45:02,524 INFO L226 Difference]: Without dead ends: 140 [2022-11-25 23:45:02,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=381, Invalid=1511, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:45:02,526 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 141 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:02,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1020 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 23:45:02,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-25 23:45:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2022-11-25 23:45:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 101 states have internal predecessors, (113), 20 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (48), 20 states have call predecessors, (48), 19 states have call successors, (48) [2022-11-25 23:45:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 181 transitions. [2022-11-25 23:45:02,555 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 181 transitions. Word has length 74 [2022-11-25 23:45:02,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:02,556 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 181 transitions. [2022-11-25 23:45:02,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-25 23:45:02,556 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 181 transitions. [2022-11-25 23:45:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 23:45:02,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:02,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:45:02,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:45:02,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-11-25 23:45:02,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-25 23:45:03,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:45:03,171 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:45:03,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:03,171 INFO L85 PathProgramCache]: Analyzing trace with hash 359389810, now seen corresponding path program 1 times [2022-11-25 23:45:03,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:45:03,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595504435] [2022-11-25 23:45:03,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:03,172 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 [2022-11-25 23:45:03,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:45:03,173 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:45:03,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:45:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:45:03,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:45:03,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:45:03,330 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:45:03,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595504435] [2022-11-25 23:45:03,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595504435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:45:03,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:45:03,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 23:45:03,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615416596] [2022-11-25 23:45:03,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:45:03,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:45:03,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:45:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:45:03,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:45:03,332 INFO L87 Difference]: Start difference. First operand 130 states and 181 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:45:03,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:03,449 INFO L93 Difference]: Finished difference Result 144 states and 196 transitions. [2022-11-25 23:45:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:45:03,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2022-11-25 23:45:03,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:03,451 INFO L225 Difference]: With dead ends: 144 [2022-11-25 23:45:03,451 INFO L226 Difference]: Without dead ends: 135 [2022-11-25 23:45:03,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:45:03,452 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 7 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:03,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 349 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:45:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-25 23:45:03,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-11-25 23:45:03,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 101 states have internal predecessors, (113), 20 states have call successors, (20), 8 states have call predecessors, (20), 12 states have return successors, (45), 20 states have call predecessors, (45), 19 states have call successors, (45) [2022-11-25 23:45:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 178 transitions. [2022-11-25 23:45:03,506 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 178 transitions. Word has length 74 [2022-11-25 23:45:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:03,506 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 178 transitions. [2022-11-25 23:45:03,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:45:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 178 transitions. [2022-11-25 23:45:03,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 23:45:03,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:03,510 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:45:03,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 23:45:03,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:45:03,722 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:45:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:03,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1455113153, now seen corresponding path program 2 times [2022-11-25 23:45:03,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:45:03,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145781999] [2022-11-25 23:45:03,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:45:03,724 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 [2022-11-25 23:45:03,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:45:03,726 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:45:03,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-25 23:45:03,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:45:03,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:45:03,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:45:03,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:45:04,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:45:07,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:45:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145781999] [2022-11-25 23:45:07,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145781999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [262016701] [2022-11-25 23:45:07,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:45:07,748 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:45:07,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:45:07,749 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:45:07,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-25 23:45:07,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:45:07,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:45:07,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:45:07,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:45:08,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:45:09,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [262016701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:09,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078264780] [2022-11-25 23:45:09,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:45:09,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:45:09,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:45:09,526 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:45:09,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-25 23:45:09,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:45:09,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:45:09,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:45:09,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:45:09,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:45:11,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078264780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:11,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:45:11,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15, 16, 15, 16] total 28 [2022-11-25 23:45:11,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790396299] [2022-11-25 23:45:11,005 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:45:11,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 23:45:11,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:45:11,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 23:45:11,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:45:11,007 INFO L87 Difference]: Start difference. First operand 130 states and 178 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-25 23:45:16,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:16,739 INFO L93 Difference]: Finished difference Result 162 states and 213 transitions. [2022-11-25 23:45:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 23:45:16,740 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 74 [2022-11-25 23:45:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:16,742 INFO L225 Difference]: With dead ends: 162 [2022-11-25 23:45:16,742 INFO L226 Difference]: Without dead ends: 148 [2022-11-25 23:45:16,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:45:16,743 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 195 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:16,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1017 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 23:45:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-25 23:45:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 138. [2022-11-25 23:45:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 107 states have internal predecessors, (121), 21 states have call successors, (21), 9 states have call predecessors, (21), 12 states have return successors, (43), 21 states have call predecessors, (43), 20 states have call successors, (43) [2022-11-25 23:45:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 185 transitions. [2022-11-25 23:45:16,775 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 185 transitions. Word has length 74 [2022-11-25 23:45:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:16,775 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 185 transitions. [2022-11-25 23:45:16,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 8 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-25 23:45:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 185 transitions. [2022-11-25 23:45:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-25 23:45:16,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:16,777 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:45:16,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2022-11-25 23:45:16,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-25 23:45:17,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-25 23:45:17,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:45:17,380 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:45:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:17,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2068625504, now seen corresponding path program 1 times [2022-11-25 23:45:17,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:45:17,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338584065] [2022-11-25 23:45:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:17,381 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 [2022-11-25 23:45:17,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:45:17,382 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:45:17,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-25 23:45:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:17,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:45:17,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:45:18,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:45:20,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:45:20,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338584065] [2022-11-25 23:45:20,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338584065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:20,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1730552553] [2022-11-25 23:45:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:20,600 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:45:20,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:45:20,601 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:45:20,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-25 23:45:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:20,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:45:20,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:45:21,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:45:21,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1730552553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:21,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054484265] [2022-11-25 23:45:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:21,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:45:21,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:45:21,922 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:45:21,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-25 23:45:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:22,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 23:45:22,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 23:45:23,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:45:25,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054484265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:25,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:45:25,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14, 15, 18, 19] total 39 [2022-11-25 23:45:25,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338510383] [2022-11-25 23:45:25,786 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:45:25,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 23:45:25,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:45:25,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 23:45:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 23:45:25,787 INFO L87 Difference]: Start difference. First operand 138 states and 185 transitions. Second operand has 39 states, 37 states have (on average 2.135135135135135) internal successors, (79), 39 states have internal predecessors, (79), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-25 23:45:34,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:34,369 INFO L93 Difference]: Finished difference Result 159 states and 207 transitions. [2022-11-25 23:45:34,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 23:45:34,380 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.135135135135135) internal successors, (79), 39 states have internal predecessors, (79), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) Word has length 78 [2022-11-25 23:45:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:34,382 INFO L225 Difference]: With dead ends: 159 [2022-11-25 23:45:34,382 INFO L226 Difference]: Without dead ends: 130 [2022-11-25 23:45:34,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=530, Invalid=3010, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 23:45:34,385 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 187 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 1333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:34,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1182 Invalid, 1333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-25 23:45:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-25 23:45:34,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2022-11-25 23:45:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 95 states have internal predecessors, (106), 19 states have call successors, (19), 8 states have call predecessors, (19), 11 states have return successors, (37), 19 states have call predecessors, (37), 18 states have call successors, (37) [2022-11-25 23:45:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 162 transitions. [2022-11-25 23:45:34,435 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 162 transitions. Word has length 78 [2022-11-25 23:45:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:34,435 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 162 transitions. [2022-11-25 23:45:34,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.135135135135135) internal successors, (79), 39 states have internal predecessors, (79), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-25 23:45:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 162 transitions. [2022-11-25 23:45:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-25 23:45:34,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:34,437 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:45:34,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-25 23:45:34,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-25 23:45:34,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-11-25 23:45:35,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:45:35,045 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:45:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:35,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1678929915, now seen corresponding path program 1 times [2022-11-25 23:45:35,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:45:35,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627223774] [2022-11-25 23:45:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:35,046 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 [2022-11-25 23:45:35,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:45:35,047 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:45:35,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-25 23:45:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:35,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 23:45:35,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:38,183 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:45:38,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:45:50,597 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:45:50,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627223774] [2022-11-25 23:45:50,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627223774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:50,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [421245980] [2022-11-25 23:45:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:45:50,597 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:45:50,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:45:50,598 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:45:50,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-25 23:45:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:45:50,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 23:45:50,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:45:53,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:46:02,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [421245980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:02,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687336669] [2022-11-25 23:46:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:46:02,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:02,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:02,563 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:46:02,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-25 23:46:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:46:02,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-25 23:46:02,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 23:46:03,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:46:11,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687336669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:11,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:46:11,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 18, 18, 24, 26] total 73 [2022-11-25 23:46:11,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695530603] [2022-11-25 23:46:11,393 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:46:11,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-25 23:46:11,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:46:11,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-25 23:46:11,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=4629, Unknown=0, NotChecked=0, Total=5256 [2022-11-25 23:46:11,397 INFO L87 Difference]: Start difference. First operand 123 states and 162 transitions. Second operand has 73 states, 71 states have (on average 1.619718309859155) internal successors, (115), 70 states have internal predecessors, (115), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-25 23:46:58,682 WARN L233 SmtUtils]: Spent 37.01s on a formula simplification. DAG size of input: 90 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:47:25,127 WARN L233 SmtUtils]: Spent 24.34s on a formula simplification. DAG size of input: 92 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:47:57,618 WARN L233 SmtUtils]: Spent 28.99s on a formula simplification. DAG size of input: 96 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:48:29,805 WARN L233 SmtUtils]: Spent 29.35s on a formula simplification. DAG size of input: 102 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:48:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:48:40,428 INFO L93 Difference]: Finished difference Result 156 states and 201 transitions. [2022-11-25 23:48:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 23:48:40,432 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 71 states have (on average 1.619718309859155) internal successors, (115), 70 states have internal predecessors, (115), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) Word has length 81 [2022-11-25 23:48:40,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:48:40,434 INFO L225 Difference]: With dead ends: 156 [2022-11-25 23:48:40,434 INFO L226 Difference]: Without dead ends: 143 [2022-11-25 23:48:40,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 407 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 162.5s TimeCoverageRelationStatistics Valid=1319, Invalid=8781, Unknown=0, NotChecked=0, Total=10100 [2022-11-25 23:48:40,439 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 257 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 2314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:48:40,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 1788 Invalid, 2314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2180 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2022-11-25 23:48:40,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-25 23:48:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 127. [2022-11-25 23:48:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 97 states have internal predecessors, (109), 20 states have call successors, (20), 8 states have call predecessors, (20), 11 states have return successors, (36), 21 states have call predecessors, (36), 19 states have call successors, (36) [2022-11-25 23:48:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2022-11-25 23:48:40,490 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 81 [2022-11-25 23:48:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:48:40,491 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2022-11-25 23:48:40,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 71 states have (on average 1.619718309859155) internal successors, (115), 70 states have internal predecessors, (115), 17 states have call successors, (20), 2 states have call predecessors, (20), 9 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-25 23:48:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2022-11-25 23:48:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-25 23:48:40,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:48:40,493 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:48:40,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-25 23:48:40,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-25 23:48:40,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2022-11-25 23:48:41,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:48:41,100 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:48:41,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:48:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash -823382364, now seen corresponding path program 2 times [2022-11-25 23:48:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:48:41,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110695519] [2022-11-25 23:48:41,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:48:41,101 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 [2022-11-25 23:48:41,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:48:41,102 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:48:41,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-25 23:48:41,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:48:41,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:48:41,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:48:41,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:48:42,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:48:44,989 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:48:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110695519] [2022-11-25 23:48:44,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110695519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1812569101] [2022-11-25 23:48:44,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:48:44,990 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:48:44,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:48:44,992 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:48:44,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-25 23:48:45,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:48:45,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:48:45,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:48:45,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:48:45,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:48:46,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1812569101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:46,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404814138] [2022-11-25 23:48:46,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:48:46,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:48:46,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:48:46,511 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:48:46,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-25 23:48:46,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:48:46,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:48:46,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 23:48:46,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:48:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 23:48:47,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:48:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 23:48:50,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404814138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:48:50,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:48:50,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14, 15, 18, 19] total 41 [2022-11-25 23:48:50,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468048511] [2022-11-25 23:48:50,648 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:48:50,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-25 23:48:50,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:48:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-25 23:48:50,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 23:48:50,651 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 41 states have internal predecessors, (82), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-25 23:49:00,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:49:00,354 INFO L93 Difference]: Finished difference Result 150 states and 189 transitions. [2022-11-25 23:49:00,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 23:49:00,355 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 41 states have internal predecessors, (82), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) Word has length 78 [2022-11-25 23:49:00,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:49:00,357 INFO L225 Difference]: With dead ends: 150 [2022-11-25 23:49:00,357 INFO L226 Difference]: Without dead ends: 121 [2022-11-25 23:49:00,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=616, Invalid=3544, Unknown=0, NotChecked=0, Total=4160 [2022-11-25 23:49:00,361 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 195 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:49:00,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 1241 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-25 23:49:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-25 23:49:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2022-11-25 23:49:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 17 states have call successors, (17), 6 states have call predecessors, (17), 10 states have return successors, (32), 18 states have call predecessors, (32), 16 states have call successors, (32) [2022-11-25 23:49:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 137 transitions. [2022-11-25 23:49:00,395 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 137 transitions. Word has length 78 [2022-11-25 23:49:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:49:00,395 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 137 transitions. [2022-11-25 23:49:00,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 41 states have internal predecessors, (82), 13 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 11 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-25 23:49:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 137 transitions. [2022-11-25 23:49:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-25 23:49:00,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:49:00,397 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:49:00,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-25 23:49:00,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2022-11-25 23:49:00,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-25 23:49:00,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:49:00,998 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:49:00,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:49:00,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2063078729, now seen corresponding path program 2 times [2022-11-25 23:49:00,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:49:00,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697950771] [2022-11-25 23:49:00,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:49:00,999 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 [2022-11-25 23:49:00,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:49:01,000 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:49:01,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-25 23:49:01,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:49:01,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:49:01,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 23:49:01,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:49:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:49:03,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:49:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:49:09,116 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:49:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697950771] [2022-11-25 23:49:09,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697950771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:49:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1147261128] [2022-11-25 23:49:09,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:49:09,117 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:49:09,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:49:09,124 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:49:09,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-25 23:49:09,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:49:09,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:49:09,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 23:49:09,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:49:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:49:09,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:49:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:49:11,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1147261128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:49:11,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331030452] [2022-11-25 23:49:11,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:49:11,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:49:11,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:49:11,615 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:49:11,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-25 23:49:11,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:49:11,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:49:11,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 23:49:11,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:49:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:49:15,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:49:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:49:30,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331030452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:49:30,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:49:30,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 22, 24] total 66 [2022-11-25 23:49:30,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297572588] [2022-11-25 23:49:30,598 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:49:30,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-25 23:49:30,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:49:30,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-25 23:49:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=3727, Unknown=0, NotChecked=0, Total=4290 [2022-11-25 23:49:30,603 INFO L87 Difference]: Start difference. First operand 104 states and 137 transitions. Second operand has 66 states, 64 states have (on average 1.625) internal successors, (104), 63 states have internal predecessors, (104), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-25 23:50:01,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:01,664 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2022-11-25 23:50:01,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 23:50:01,666 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 1.625) internal successors, (104), 63 states have internal predecessors, (104), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) Word has length 81 [2022-11-25 23:50:01,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:01,667 INFO L225 Difference]: With dead ends: 152 [2022-11-25 23:50:01,668 INFO L226 Difference]: Without dead ends: 131 [2022-11-25 23:50:01,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1997 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=1323, Invalid=7797, Unknown=0, NotChecked=0, Total=9120 [2022-11-25 23:50:01,670 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 272 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:01,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 1408 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1772 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-25 23:50:01,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-25 23:50:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2022-11-25 23:50:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 86 states have internal predecessors, (97), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (31), 19 states have call predecessors, (31), 17 states have call successors, (31) [2022-11-25 23:50:01,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2022-11-25 23:50:01,707 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 81 [2022-11-25 23:50:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:01,707 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2022-11-25 23:50:01,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 1.625) internal successors, (104), 63 states have internal predecessors, (104), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-25 23:50:01,708 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2022-11-25 23:50:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-25 23:50:01,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:01,709 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:50:01,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:01,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:02,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:02,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:02,323 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:50:02,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:02,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1451945505, now seen corresponding path program 1 times [2022-11-25 23:50:02,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:50:02,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197652820] [2022-11-25 23:50:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:02,323 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 [2022-11-25 23:50:02,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:50:02,325 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:50:02,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-25 23:50:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:02,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 23:50:02,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:50:05,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:50:14,057 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:50:14,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197652820] [2022-11-25 23:50:14,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197652820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:14,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1407023328] [2022-11-25 23:50:14,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:14,058 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:50:14,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:50:14,059 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:50:14,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-25 23:50:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:14,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 23:50:14,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:50:16,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:50:22,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1407023328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:22,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475810892] [2022-11-25 23:50:22,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:22,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:22,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:22,248 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:22,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-25 23:50:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:22,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 23:50:22,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:50:23,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:50:27,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475810892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:27,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:50:27,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 18, 17, 22, 24] total 63 [2022-11-25 23:50:27,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736330409] [2022-11-25 23:50:27,729 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:27,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-25 23:50:27,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:50:27,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-25 23:50:27,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3524, Unknown=0, NotChecked=0, Total=3906 [2022-11-25 23:50:27,732 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 63 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) [2022-11-25 23:50:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:54,113 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2022-11-25 23:50:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 23:50:54,116 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) Word has length 79 [2022-11-25 23:50:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:54,117 INFO L225 Difference]: With dead ends: 156 [2022-11-25 23:50:54,118 INFO L226 Difference]: Without dead ends: 135 [2022-11-25 23:50:54,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 404 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=1334, Invalid=8968, Unknown=0, NotChecked=0, Total=10302 [2022-11-25 23:50:54,120 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 218 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2204 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:54,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1562 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2204 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2022-11-25 23:50:54,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-25 23:50:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2022-11-25 23:50:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 94 states have internal predecessors, (107), 19 states have call successors, (19), 8 states have call predecessors, (19), 10 states have return successors, (30), 20 states have call predecessors, (30), 18 states have call successors, (30) [2022-11-25 23:50:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2022-11-25 23:50:54,160 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 79 [2022-11-25 23:50:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:54,160 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2022-11-25 23:50:54,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 60 states have internal predecessors, (101), 16 states have call successors, (19), 2 states have call predecessors, (19), 8 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) [2022-11-25 23:50:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2022-11-25 23:50:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 23:50:54,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:54,162 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:50:54,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-11-25 23:50:54,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2022-11-25 23:50:54,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:54,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:50:54,764 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:50:54,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:54,765 INFO L85 PathProgramCache]: Analyzing trace with hash -476190709, now seen corresponding path program 1 times [2022-11-25 23:50:54,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:50:54,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751439546] [2022-11-25 23:50:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:54,765 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 [2022-11-25 23:50:54,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:50:54,766 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:50:54,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-25 23:50:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:54,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:50:54,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:50:55,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:50:55,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:50:55,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751439546] [2022-11-25 23:50:55,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751439546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:55,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [754845994] [2022-11-25 23:50:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:55,373 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:50:55,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:50:55,375 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:50:55,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-25 23:50:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:55,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:50:55,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:50:55,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:50:55,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [754845994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:55,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900195746] [2022-11-25 23:50:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:50:55,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:55,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:55,848 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:55,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-25 23:50:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:50:55,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:50:55,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:50:56,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:50:56,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900195746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:56,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:50:56,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 15 [2022-11-25 23:50:56,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069217245] [2022-11-25 23:50:56,248 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:56,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:50:56,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:50:56,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:50:56,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:50:56,250 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-25 23:50:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:56,956 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2022-11-25 23:50:56,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 23:50:56,957 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2022-11-25 23:50:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:56,958 INFO L225 Difference]: With dead ends: 132 [2022-11-25 23:50:56,958 INFO L226 Difference]: Without dead ends: 119 [2022-11-25 23:50:56,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:50:56,959 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 118 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:56,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 666 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:50:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-25 23:50:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-11-25 23:50:57,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 92 states have internal predecessors, (104), 18 states have call successors, (18), 7 states have call predecessors, (18), 10 states have return successors, (28), 19 states have call predecessors, (28), 17 states have call successors, (28) [2022-11-25 23:50:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 150 transitions. [2022-11-25 23:50:57,004 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 150 transitions. Word has length 82 [2022-11-25 23:50:57,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:57,005 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 150 transitions. [2022-11-25 23:50:57,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-25 23:50:57,005 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 150 transitions. [2022-11-25 23:50:57,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-25 23:50:57,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:57,007 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:50:57,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (69)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:57,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-25 23:50:57,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-11-25 23:50:57,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:57,610 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:50:57,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:57,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1133603807, now seen corresponding path program 2 times [2022-11-25 23:50:57,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:50:57,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240193261] [2022-11-25 23:50:57,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:50:57,611 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 [2022-11-25 23:50:57,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:50:57,612 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:50:57,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-25 23:50:57,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:50:57,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:50:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 23:50:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:50:59,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:51:04,698 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:51:04,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240193261] [2022-11-25 23:51:04,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240193261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:04,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [540212996] [2022-11-25 23:51:04,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:51:04,699 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:51:04,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:51:04,700 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:51:04,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-25 23:51:04,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:51:04,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:04,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 23:51:04,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:51:05,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:51:07,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [540212996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:07,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016623713] [2022-11-25 23:51:07,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:51:07,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:07,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:07,060 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:07,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-25 23:51:07,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:51:07,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:07,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 23:51:07,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 23:51:11,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:51:18,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016623713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:18,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:51:18,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 22, 24] total 58 [2022-11-25 23:51:18,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930028324] [2022-11-25 23:51:18,618 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:18,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-25 23:51:18,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:51:18,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-25 23:51:18,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2974, Unknown=0, NotChecked=0, Total=3306 [2022-11-25 23:51:18,620 INFO L87 Difference]: Start difference. First operand 119 states and 150 transitions. Second operand has 58 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-25 23:51:44,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:44,915 INFO L93 Difference]: Finished difference Result 162 states and 198 transitions. [2022-11-25 23:51:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 23:51:44,917 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) Word has length 79 [2022-11-25 23:51:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:44,918 INFO L225 Difference]: With dead ends: 162 [2022-11-25 23:51:44,919 INFO L226 Difference]: Without dead ends: 138 [2022-11-25 23:51:44,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=1220, Invalid=8286, Unknown=0, NotChecked=0, Total=9506 [2022-11-25 23:51:44,920 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 197 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:44,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 1358 Invalid, 2019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1913 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-11-25 23:51:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-25 23:51:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2022-11-25 23:51:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 90 states have internal predecessors, (103), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-11-25 23:51:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2022-11-25 23:51:44,944 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 79 [2022-11-25 23:51:44,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:44,944 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2022-11-25 23:51:44,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 55 states have internal predecessors, (94), 15 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-25 23:51:44,944 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2022-11-25 23:51:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-25 23:51:44,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:44,945 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:44,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:45,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:45,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-25 23:51:45,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:51:45,548 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash -514341681, now seen corresponding path program 2 times [2022-11-25 23:51:45,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:51:45,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829774844] [2022-11-25 23:51:45,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:51:45,549 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 [2022-11-25 23:51:45,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:51:45,549 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:51:45,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-25 23:51:45,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:51:45,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:51:45,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:51:45,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:51:46,146 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:51:46,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829774844] [2022-11-25 23:51:46,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829774844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:46,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [791500965] [2022-11-25 23:51:46,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:51:46,146 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:51:46,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:51:46,147 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:51:46,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-25 23:51:46,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:51:46,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:46,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:51:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:51:46,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:51:46,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [791500965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:46,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798586601] [2022-11-25 23:51:46,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:51:46,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:46,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:46,685 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:46,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-25 23:51:46,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:51:46,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:46,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:51:46,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:51:46,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:51:47,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798586601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:47,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:51:47,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 15 [2022-11-25 23:51:47,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542729162] [2022-11-25 23:51:47,119 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:47,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:51:47,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:51:47,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:51:47,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:51:47,120 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-25 23:51:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:47,746 INFO L93 Difference]: Finished difference Result 125 states and 153 transitions. [2022-11-25 23:51:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 23:51:47,746 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 82 [2022-11-25 23:51:47,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:47,747 INFO L225 Difference]: With dead ends: 125 [2022-11-25 23:51:47,747 INFO L226 Difference]: Without dead ends: 102 [2022-11-25 23:51:47,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:51:47,748 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 111 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:47,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 646 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:51:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-25 23:51:47,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2022-11-25 23:51:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (21), 15 states have call predecessors, (21), 14 states have call successors, (21) [2022-11-25 23:51:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-11-25 23:51:47,767 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 82 [2022-11-25 23:51:47,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:47,767 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-11-25 23:51:47,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 8 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-25 23:51:47,767 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-11-25 23:51:47,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-25 23:51:47,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:47,768 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:47,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:47,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:48,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-25 23:51:48,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:51:48,375 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:51:48,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:48,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1357497146, now seen corresponding path program 1 times [2022-11-25 23:51:48,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:51:48,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781743405] [2022-11-25 23:51:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:51:48,376 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 [2022-11-25 23:51:48,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:51:48,377 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:51:48,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-25 23:51:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:51:49,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 23:51:49,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:51:53,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:52:06,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:52:06,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781743405] [2022-11-25 23:52:06,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781743405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:06,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [342236246] [2022-11-25 23:52:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:06,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:06,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:52:06,382 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:52:06,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-25 23:52:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:06,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 23:52:06,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:52:07,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:52:10,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [342236246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:10,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504736081] [2022-11-25 23:52:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:52:10,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:52:10,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:52:10,436 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:52:10,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-11-25 23:52:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:52:11,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 23:52:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:52:12,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:52:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-25 23:52:19,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504736081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:52:19,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:52:19,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24, 23, 26, 25] total 52 [2022-11-25 23:52:19,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077976984] [2022-11-25 23:52:19,032 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:52:19,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-25 23:52:19,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:52:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-25 23:52:19,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=2405, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 23:52:19,034 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-25 23:52:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:52:53,148 INFO L93 Difference]: Finished difference Result 111 states and 133 transitions. [2022-11-25 23:52:53,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 23:52:53,151 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) Word has length 84 [2022-11-25 23:52:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:52:53,151 INFO L225 Difference]: With dead ends: 111 [2022-11-25 23:52:53,151 INFO L226 Difference]: Without dead ends: 104 [2022-11-25 23:52:53,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 446 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=709, Invalid=5770, Unknown=1, NotChecked=0, Total=6480 [2022-11-25 23:52:53,153 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 141 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:52:53,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1114 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-11-25 23:52:53,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-25 23:52:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2022-11-25 23:52:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (20), 15 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-25 23:52:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-11-25 23:52:53,176 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 84 [2022-11-25 23:52:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:52:53,176 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-11-25 23:52:53,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-25 23:52:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-11-25 23:52:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-25 23:52:53,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:52:53,177 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:52:53,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-25 23:52:53,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:53,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (78)] Forceful destruction successful, exit code 0 [2022-11-25 23:52:53,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:52:53,786 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:52:53,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:52:53,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1014343994, now seen corresponding path program 2 times [2022-11-25 23:52:53,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:52:53,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445511056] [2022-11-25 23:52:53,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:52:53,787 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 [2022-11-25 23:52:53,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:52:53,788 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:52:53,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-25 23:52:54,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:52:54,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:52:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 23:52:54,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:52:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:52:57,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:53:10,212 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:53:10,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445511056] [2022-11-25 23:53:10,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445511056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:10,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1046471703] [2022-11-25 23:53:10,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:53:10,212 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:53:10,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:53:10,213 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:53:10,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (81)] Waiting until timeout for monitored process [2022-11-25 23:53:10,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:53:10,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:53:10,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 23:53:10,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:53:11,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:53:14,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1046471703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:14,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89639530] [2022-11-25 23:53:14,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:53:14,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:53:14,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:53:14,202 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:53:14,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-11-25 23:53:15,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:53:15,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:53:15,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 23:53:15,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:53:16,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:53:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-25 23:53:22,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89639530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:53:22,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:53:22,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24, 23, 26, 25] total 52 [2022-11-25 23:53:22,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508191118] [2022-11-25 23:53:22,486 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:53:22,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-25 23:53:22,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:53:22,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-25 23:53:22,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 23:53:22,488 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-25 23:53:41,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:53:54,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:53:54,916 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2022-11-25 23:53:54,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 23:53:54,918 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) Word has length 84 [2022-11-25 23:53:54,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:53:54,919 INFO L225 Difference]: With dead ends: 108 [2022-11-25 23:53:54,919 INFO L226 Difference]: Without dead ends: 101 [2022-11-25 23:53:54,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 447 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=655, Invalid=5507, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 23:53:54,921 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 180 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:53:54,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1105 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2022-11-25 23:53:54,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-25 23:53:54,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2022-11-25 23:53:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 70 states have internal predecessors, (78), 15 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (19), 14 states have call predecessors, (19), 14 states have call successors, (19) [2022-11-25 23:53:54,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2022-11-25 23:53:54,968 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 84 [2022-11-25 23:53:54,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:53:54,968 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2022-11-25 23:53:54,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.6) internal successors, (80), 48 states have internal predecessors, (80), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-25 23:53:54,968 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2022-11-25 23:53:54,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-25 23:53:54,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:53:54,970 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:53:54,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-25 23:53:55,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (81)] Ended with exit code 0 [2022-11-25 23:53:55,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-11-25 23:53:55,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:53:55,584 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:53:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:53:55,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1930237036, now seen corresponding path program 1 times [2022-11-25 23:53:55,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:53:55,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614904031] [2022-11-25 23:53:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:53:55,585 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 [2022-11-25 23:53:55,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:53:55,586 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:53:55,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-25 23:53:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:53:55,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 23:53:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:53:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:53:57,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:54:01,245 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:01,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614904031] [2022-11-25 23:54:01,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614904031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:01,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [71972073] [2022-11-25 23:54:01,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:01,245 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:01,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:54:01,246 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:54:01,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-25 23:54:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:01,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 23:54:01,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:54:02,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:54:04,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [71972073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:04,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600095418] [2022-11-25 23:54:04,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:04,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:04,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:04,639 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:04,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-11-25 23:54:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:04,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 23:54:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:09,870 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:54:09,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:54:11,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600095418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:11,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:54:11,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 17, 22, 16] total 50 [2022-11-25 23:54:11,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928722035] [2022-11-25 23:54:11,788 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:54:11,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-25 23:54:11,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:11,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-25 23:54:11,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2171, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 23:54:11,791 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (19), 15 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-25 23:54:23,931 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] [2022-11-25 23:54:25,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:25,717 INFO L93 Difference]: Finished difference Result 119 states and 142 transitions. [2022-11-25 23:54:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 23:54:25,720 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (19), 15 states have call predecessors, (19), 13 states have call successors, (19) Word has length 85 [2022-11-25 23:54:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:25,721 INFO L225 Difference]: With dead ends: 119 [2022-11-25 23:54:25,721 INFO L226 Difference]: Without dead ends: 88 [2022-11-25 23:54:25,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=798, Invalid=5364, Unknown=0, NotChecked=0, Total=6162 [2022-11-25 23:54:25,723 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 105 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 81 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:25,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 710 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 864 Invalid, 1 Unknown, 0 Unchecked, 7.5s Time] [2022-11-25 23:54:25,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-25 23:54:25,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-11-25 23:54:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 64 states have internal predecessors, (71), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2022-11-25 23:54:25,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2022-11-25 23:54:25,755 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 85 [2022-11-25 23:54:25,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:25,755 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2022-11-25 23:54:25,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 14 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (19), 15 states have call predecessors, (19), 13 states have call successors, (19) [2022-11-25 23:54:25,756 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2022-11-25 23:54:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-25 23:54:25,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:25,757 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:25,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (84)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:25,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-25 23:54:26,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-11-25 23:54:26,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:26,361 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:26,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:26,361 INFO L85 PathProgramCache]: Analyzing trace with hash 117576084, now seen corresponding path program 2 times [2022-11-25 23:54:26,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:26,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358813768] [2022-11-25 23:54:26,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:54:26,362 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 [2022-11-25 23:54:26,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:26,363 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:54:26,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-25 23:54:26,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:54:26,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:54:26,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 23:54:26,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:54:28,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:54:32,424 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:32,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358813768] [2022-11-25 23:54:32,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358813768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:32,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [885416672] [2022-11-25 23:54:32,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:54:32,425 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:32,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:54:32,426 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:54:32,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-25 23:54:32,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:54:32,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:54:32,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 23:54:32,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:54:33,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:54:35,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [885416672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:35,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456802117] [2022-11-25 23:54:35,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:54:35,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:54:35,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:54:35,883 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:54:35,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-11-25 23:54:36,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:54:36,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:54:36,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 23:54:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:54:36,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:54:37,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456802117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:37,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:54:37,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 17, 17, 16] total 35 [2022-11-25 23:54:37,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206633245] [2022-11-25 23:54:37,782 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:54:37,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 23:54:37,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:54:37,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 23:54:37,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 23:54:37,783 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-25 23:54:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:48,102 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2022-11-25 23:54:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 23:54:48,104 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) Word has length 85 [2022-11-25 23:54:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:48,104 INFO L225 Difference]: With dead ends: 105 [2022-11-25 23:54:48,105 INFO L226 Difference]: Without dead ends: 74 [2022-11-25 23:54:48,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=546, Invalid=2994, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 23:54:48,106 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 91 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:48,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 879 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-25 23:54:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-25 23:54:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-25 23:54:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 58 states have internal predecessors, (64), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2022-11-25 23:54:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2022-11-25 23:54:48,125 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 85 [2022-11-25 23:54:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:48,125 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2022-11-25 23:54:48,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-25 23:54:48,126 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2022-11-25 23:54:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-25 23:54:48,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:48,127 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:48,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:48,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-25 23:54:48,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (87)] Ended with exit code 0 [2022-11-25 23:54:48,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:48,728 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:54:48,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:48,728 INFO L85 PathProgramCache]: Analyzing trace with hash 608590994, now seen corresponding path program 1 times [2022-11-25 23:54:48,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:48,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091163517] [2022-11-25 23:54:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:54:48,729 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 [2022-11-25 23:54:48,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:48,729 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:54:48,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-25 23:54:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:54:49,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 23:54:49,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:54:53,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:55:06,918 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:55:06,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091163517] [2022-11-25 23:55:06,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091163517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:06,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [704589605] [2022-11-25 23:55:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:06,919 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:55:06,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:55:06,920 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:55:06,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-25 23:55:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:07,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 23:55:07,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:55:11,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:55:19,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [704589605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:19,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716186801] [2022-11-25 23:55:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:55:19,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:19,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:19,053 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:19,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-25 23:55:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:55:19,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 23:55:19,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:55:22,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-25 23:55:43,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716186801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:43,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:55:43,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26, 25, 28, 28] total 91 [2022-11-25 23:55:43,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407687484] [2022-11-25 23:55:43,881 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:55:43,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-25 23:55:43,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:55:43,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-25 23:55:43,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=7722, Unknown=0, NotChecked=0, Total=8190 [2022-11-25 23:55:43,883 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 91 states, 86 states have (on average 1.430232558139535) internal successors, (123), 83 states have internal predecessors, (123), 21 states have call successors, (24), 2 states have call predecessors, (24), 10 states have return successors, (28), 23 states have call predecessors, (28), 20 states have call successors, (28) [2022-11-25 23:56:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:56:29,473 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2022-11-25 23:56:29,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 23:56:29,475 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 86 states have (on average 1.430232558139535) internal successors, (123), 83 states have internal predecessors, (123), 21 states have call successors, (24), 2 states have call predecessors, (24), 10 states have return successors, (28), 23 states have call predecessors, (28), 20 states have call successors, (28) Word has length 86 [2022-11-25 23:56:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:56:29,475 INFO L225 Difference]: With dead ends: 86 [2022-11-25 23:56:29,475 INFO L226 Difference]: Without dead ends: 75 [2022-11-25 23:56:29,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 420 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3030 ImplicationChecksByTransitivity, 74.9s TimeCoverageRelationStatistics Valid=1060, Invalid=12050, Unknown=0, NotChecked=0, Total=13110 [2022-11-25 23:56:29,476 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 162 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 2016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:56:29,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1777 Invalid, 2016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2022-11-25 23:56:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-25 23:56:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-11-25 23:56:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 58 states have internal predecessors, (65), 10 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2022-11-25 23:56:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2022-11-25 23:56:29,488 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 86 [2022-11-25 23:56:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:56:29,488 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2022-11-25 23:56:29,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 86 states have (on average 1.430232558139535) internal successors, (123), 83 states have internal predecessors, (123), 21 states have call successors, (24), 2 states have call predecessors, (24), 10 states have return successors, (28), 23 states have call predecessors, (28), 20 states have call successors, (28) [2022-11-25 23:56:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2022-11-25 23:56:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-25 23:56:29,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:56:29,489 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:56:29,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-11-25 23:56:29,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-25 23:56:29,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (90)] Ended with exit code 0 [2022-11-25 23:56:30,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:56:30,091 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:56:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:56:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1561964758, now seen corresponding path program 2 times [2022-11-25 23:56:30,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:56:30,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456446895] [2022-11-25 23:56:30,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:56:30,092 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 [2022-11-25 23:56:30,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:56:30,093 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -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) [2022-11-25 23:56:30,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-25 23:56:30,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:56:30,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:56:30,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 23:56:30,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:56:35,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:56:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:56:50,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:56:50,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456446895] [2022-11-25 23:56:50,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456446895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:56:50,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [120526937] [2022-11-25 23:56:50,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:56:50,125 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:56:50,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:56:50,126 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:56:50,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-25 23:56:50,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:56:50,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:56:50,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 23:56:50,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:56:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 23:56:55,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-25 23:57:03,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [120526937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:03,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728963576] [2022-11-25 23:57:03,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:57:03,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:57:03,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:57:03,215 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:57:03,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0874911a-cfaa-446c-800f-c5f24b397b8d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-25 23:57:04,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:57:04,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:57:04,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 23:57:04,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:57:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 23:57:05,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:57:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-25 23:57:14,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728963576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:57:14,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:57:14,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26, 25, 28, 28] total 71 [2022-11-25 23:57:14,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150535990] [2022-11-25 23:57:14,582 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:57:14,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-25 23:57:14,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:57:14,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-25 23:57:14,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=4624, Unknown=0, NotChecked=0, Total=4970 [2022-11-25 23:57:14,585 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 71 states, 67 states have (on average 1.507462686567164) internal successors, (101), 65 states have internal predecessors, (101), 17 states have call successors, (20), 2 states have call predecessors, (20), 7 states have return successors, (22), 18 states have call predecessors, (22), 16 states have call successors, (22)