./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product33.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI --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 4e977513fd5d8adeea8c73d7c4eeb6cb821e6c768a15a7e6394764a4355fc74d --- 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-5e519f3 [2022-11-03 02:25:03,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:25:03,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:25:03,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:25:03,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:25:03,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:25:03,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:25:03,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:25:03,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:25:03,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:25:03,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:25:03,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:25:03,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:25:03,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:25:03,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:25:03,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:25:03,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:25:03,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:25:03,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:25:03,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:25:03,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:25:03,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:25:03,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:25:03,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:25:03,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:25:03,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:25:03,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:25:03,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:25:03,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:25:03,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:25:03,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:25:03,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:25:03,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:25:03,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:25:03,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:25:03,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:25:03,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:25:03,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:25:03,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:25:03,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:25:03,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:25:03,925 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:25:03,969 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:25:03,970 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:25:03,970 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:25:03,971 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:25:03,972 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:25:03,972 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:25:03,972 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:25:03,973 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:25:03,973 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:25:03,973 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:25:03,974 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:25:03,975 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:25:03,975 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:25:03,975 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:25:03,975 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:25:03,976 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:25:03,976 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:25:03,976 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:25:03,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:25:03,977 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:25:03,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:25:03,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:25:03,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:25:03,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:25:03,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:25:03,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:25:03,979 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:25:03,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:25:03,981 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:25:03,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:25:03,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:25:03,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:25:03,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:25:03,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:25:03,983 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:25:03,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:25:03,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:25:03,984 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:25:03,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:25:03,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:25:03,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:25:03,985 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_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e977513fd5d8adeea8c73d7c4eeb6cb821e6c768a15a7e6394764a4355fc74d [2022-11-03 02:25:04,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:25:04,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:25:04,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:25:04,347 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:25:04,348 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:25:04,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/email_spec11_product33.cil.c [2022-11-03 02:25:04,428 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/data/f039ec9b2/6a3010f1c5e3410fbf96f0022e0d97d6/FLAG24b93e37a [2022-11-03 02:25:05,123 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:25:05,123 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/sv-benchmarks/c/product-lines/email_spec11_product33.cil.c [2022-11-03 02:25:05,151 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/data/f039ec9b2/6a3010f1c5e3410fbf96f0022e0d97d6/FLAG24b93e37a [2022-11-03 02:25:05,314 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/data/f039ec9b2/6a3010f1c5e3410fbf96f0022e0d97d6 [2022-11-03 02:25:05,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:25:05,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:25:05,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:25:05,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:25:05,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:25:05,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:25:05" (1/1) ... [2022-11-03 02:25:05,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2afbe6b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:05, skipping insertion in model container [2022-11-03 02:25:05,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:25:05" (1/1) ... [2022-11-03 02:25:05,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:25:05,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:25:06,165 WARN L230 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_71db0155-6276-4987-a5fa-6d8beb2b4b2e/sv-benchmarks/c/product-lines/email_spec11_product33.cil.c[64763,64776] [2022-11-03 02:25:06,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:25:06,181 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:25:06,265 WARN L230 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_71db0155-6276-4987-a5fa-6d8beb2b4b2e/sv-benchmarks/c/product-lines/email_spec11_product33.cil.c[64763,64776] [2022-11-03 02:25:06,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:25:06,304 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:25:06,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:06 WrapperNode [2022-11-03 02:25:06,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:25:06,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:25:06,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:25:06,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:25:06,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:06" (1/1) ... [2022-11-03 02:25:06,381 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:06" (1/1) ... [2022-11-03 02:25:06,473 INFO L138 Inliner]: procedures = 134, calls = 227, calls flagged for inlining = 65, calls inlined = 60, statements flattened = 1064 [2022-11-03 02:25:06,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:25:06,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:25:06,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:25:06,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:25:06,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:06" (1/1) ... [2022-11-03 02:25:06,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:06" (1/1) ... [2022-11-03 02:25:06,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:06" (1/1) ... [2022-11-03 02:25:06,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:06" (1/1) ... [2022-11-03 02:25:06,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:06" (1/1) ... [2022-11-03 02:25:06,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:06" (1/1) ... [2022-11-03 02:25:06,576 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:06" (1/1) ... [2022-11-03 02:25:06,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:06" (1/1) ... [2022-11-03 02:25:06,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:25:06,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:25:06,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:25:06,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:25:06,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:06" (1/1) ... [2022-11-03 02:25:06,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:25:06,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:06,646 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:25:06,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:25:06,695 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-03 02:25:06,696 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-03 02:25:06,696 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-11-03 02:25:06,696 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-11-03 02:25:06,696 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-11-03 02:25:06,696 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-11-03 02:25:06,697 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-03 02:25:06,697 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-03 02:25:06,697 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-03 02:25:06,697 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-03 02:25:06,697 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-03 02:25:06,698 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-03 02:25:06,698 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-03 02:25:06,698 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-03 02:25:06,698 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-11-03 02:25:06,698 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-11-03 02:25:06,698 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-03 02:25:06,699 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-03 02:25:06,699 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-03 02:25:06,699 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-03 02:25:06,699 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-03 02:25:06,699 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-03 02:25:06,699 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-03 02:25:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2022-11-03 02:25:06,700 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2022-11-03 02:25:06,700 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-03 02:25:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-03 02:25:06,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:25:06,701 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-03 02:25:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-03 02:25:06,701 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-11-03 02:25:06,701 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-11-03 02:25:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-03 02:25:06,702 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-03 02:25:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-03 02:25:06,702 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-03 02:25:06,702 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-03 02:25:06,703 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-03 02:25:06,703 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-11-03 02:25:06,703 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-11-03 02:25:06,703 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-03 02:25:06,703 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-03 02:25:06,704 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-11-03 02:25:06,704 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-11-03 02:25:06,705 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-03 02:25:06,705 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-03 02:25:06,706 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-03 02:25:06,706 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-03 02:25:06,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:25:06,708 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-03 02:25:06,708 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-03 02:25:06,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:25:06,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:25:07,076 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:25:07,079 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:25:08,395 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:25:08,983 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:25:08,984 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:25:08,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:25:08 BoogieIcfgContainer [2022-11-03 02:25:08,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:25:08,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:25:08,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:25:08,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:25:08,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:25:05" (1/3) ... [2022-11-03 02:25:08,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d39e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:25:08, skipping insertion in model container [2022-11-03 02:25:08,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:25:06" (2/3) ... [2022-11-03 02:25:08,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43d39e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:25:08, skipping insertion in model container [2022-11-03 02:25:08,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:25:08" (3/3) ... [2022-11-03 02:25:08,998 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec11_product33.cil.c [2022-11-03 02:25:09,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:25:09,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:25:09,097 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:25:09,109 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;@57916a94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:25:09,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:25:09,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 209 states, 121 states have (on average 1.3057851239669422) internal successors, (158), 125 states have internal predecessors, (158), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-03 02:25:09,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:25:09,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:09,140 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:09,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:09,149 INFO L85 PathProgramCache]: Analyzing trace with hash 772251337, now seen corresponding path program 1 times [2022-11-03 02:25:09,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:09,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152672673] [2022-11-03 02:25:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:09,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:25:09,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:09,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152672673] [2022-11-03 02:25:09,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152672673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:09,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:09,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:25:09,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72001187] [2022-11-03 02:25:09,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:09,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:25:09,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:09,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:25:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:25:09,682 INFO L87 Difference]: Start difference. First operand has 209 states, 121 states have (on average 1.3057851239669422) internal successors, (158), 125 states have internal predecessors, (158), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:25:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:09,848 INFO L93 Difference]: Finished difference Result 335 states and 442 transitions. [2022-11-03 02:25:09,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:25:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 88 [2022-11-03 02:25:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:09,874 INFO L225 Difference]: With dead ends: 335 [2022-11-03 02:25:09,875 INFO L226 Difference]: Without dead ends: 206 [2022-11-03 02:25:09,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:25:09,889 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:09,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 239 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:09,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-03 02:25:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-11-03 02:25:09,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 119 states have (on average 1.2773109243697478) internal successors, (152), 122 states have internal predecessors, (152), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-11-03 02:25:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 275 transitions. [2022-11-03 02:25:09,961 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 275 transitions. Word has length 88 [2022-11-03 02:25:09,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:09,963 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 275 transitions. [2022-11-03 02:25:09,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:25:09,963 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 275 transitions. [2022-11-03 02:25:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 02:25:09,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:09,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:09,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:25:09,969 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:09,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash 158684575, now seen corresponding path program 1 times [2022-11-03 02:25:09,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:09,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129174294] [2022-11-03 02:25:09,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:09,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:25:10,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:10,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129174294] [2022-11-03 02:25:10,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129174294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:10,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:10,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:10,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7587965] [2022-11-03 02:25:10,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:10,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:10,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:10,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:10,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:10,318 INFO L87 Difference]: Start difference. First operand 206 states and 275 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:25:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:10,466 INFO L93 Difference]: Finished difference Result 331 states and 430 transitions. [2022-11-03 02:25:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:10,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 89 [2022-11-03 02:25:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:10,470 INFO L225 Difference]: With dead ends: 331 [2022-11-03 02:25:10,470 INFO L226 Difference]: Without dead ends: 208 [2022-11-03 02:25:10,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:10,473 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 0 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:10,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 471 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-03 02:25:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-11-03 02:25:10,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 121 states have (on average 1.2727272727272727) internal successors, (154), 124 states have internal predecessors, (154), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-11-03 02:25:10,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 277 transitions. [2022-11-03 02:25:10,498 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 277 transitions. Word has length 89 [2022-11-03 02:25:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:10,499 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 277 transitions. [2022-11-03 02:25:10,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:25:10,499 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 277 transitions. [2022-11-03 02:25:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:25:10,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:10,503 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:10,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:25:10,504 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:10,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:10,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1040893683, now seen corresponding path program 1 times [2022-11-03 02:25:10,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:10,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334306245] [2022-11-03 02:25:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:10,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:25:10,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:10,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334306245] [2022-11-03 02:25:10,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334306245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:25:10,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:25:10,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:25:10,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176956322] [2022-11-03 02:25:10,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:25:10,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:25:10,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:25:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:25:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:10,652 INFO L87 Difference]: Start difference. First operand 208 states and 277 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:25:10,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:25:10,798 INFO L93 Difference]: Finished difference Result 446 states and 613 transitions. [2022-11-03 02:25:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:25:10,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2022-11-03 02:25:10,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:25:10,802 INFO L225 Difference]: With dead ends: 446 [2022-11-03 02:25:10,802 INFO L226 Difference]: Without dead ends: 256 [2022-11-03 02:25:10,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:25:10,805 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 57 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:25:10,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 485 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:25:10,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-03 02:25:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 251. [2022-11-03 02:25:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 153 states have (on average 1.3529411764705883) internal successors, (207), 156 states have internal predecessors, (207), 73 states have call successors, (73), 24 states have call predecessors, (73), 24 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-11-03 02:25:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 352 transitions. [2022-11-03 02:25:10,834 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 352 transitions. Word has length 94 [2022-11-03 02:25:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:25:10,835 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 352 transitions. [2022-11-03 02:25:10,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:25:10,836 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 352 transitions. [2022-11-03 02:25:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 02:25:10,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:25:10,839 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:25:10,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:25:10,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:25:10,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:25:10,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1815040580, now seen corresponding path program 1 times [2022-11-03 02:25:10,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:25:10,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117860357] [2022-11-03 02:25:10,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:10,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:25:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:25:11,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:25:11,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117860357] [2022-11-03 02:25:11,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117860357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:25:11,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692265087] [2022-11-03 02:25:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:25:11,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:25:11,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:25:11,166 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:25:11,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:25:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:25:11,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:25:11,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:25:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:25:11,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:25:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:25:11,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692265087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:25:11,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [455410061] [2022-11-03 02:25:11,942 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-03 02:25:11,942 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:25:11,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:25:11,957 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:25:11,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:25:50,263 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 444 for LOIs [2022-11-03 02:25:50,572 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 441 for LOIs [2022-11-03 02:25:50,894 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 477 for LOIs [2022-11-03 02:26:01,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:26:01,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:01,336 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Maybe an infinite loop at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:345) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 02:26:01,339 INFO L158 Benchmark]: Toolchain (without parser) took 56019.37ms. Allocated memory was 98.6MB in the beginning and 509.6MB in the end (delta: 411.0MB). Free memory was 66.1MB in the beginning and 239.3MB in the end (delta: -173.2MB). Peak memory consumption was 315.4MB. Max. memory is 16.1GB. [2022-11-03 02:26:01,340 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory is still 53.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:26:01,340 INFO L158 Benchmark]: CACSL2BoogieTranslator took 981.35ms. Allocated memory is still 98.6MB. Free memory was 65.8MB in the beginning and 45.0MB in the end (delta: 20.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-03 02:26:01,341 INFO L158 Benchmark]: Boogie Procedure Inliner took 174.77ms. Allocated memory was 98.6MB in the beginning and 132.1MB in the end (delta: 33.6MB). Free memory was 45.0MB in the beginning and 101.7MB in the end (delta: -56.7MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. [2022-11-03 02:26:01,341 INFO L158 Benchmark]: Boogie Preprocessor took 124.20ms. Allocated memory is still 132.1MB. Free memory was 101.7MB in the beginning and 97.1MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:26:01,342 INFO L158 Benchmark]: RCFGBuilder took 2381.58ms. Allocated memory was 132.1MB in the beginning and 165.7MB in the end (delta: 33.6MB). Free memory was 97.1MB in the beginning and 85.9MB in the end (delta: 11.2MB). Peak memory consumption was 54.8MB. Max. memory is 16.1GB. [2022-11-03 02:26:01,342 INFO L158 Benchmark]: TraceAbstraction took 52347.64ms. Allocated memory was 165.7MB in the beginning and 509.6MB in the end (delta: 343.9MB). Free memory was 84.8MB in the beginning and 239.3MB in the end (delta: -154.5MB). Peak memory consumption was 267.6MB. Max. memory is 16.1GB. [2022-11-03 02:26:01,346 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 98.6MB. Free memory is still 53.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 981.35ms. Allocated memory is still 98.6MB. Free memory was 65.8MB in the beginning and 45.0MB in the end (delta: 20.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 174.77ms. Allocated memory was 98.6MB in the beginning and 132.1MB in the end (delta: 33.6MB). Free memory was 45.0MB in the beginning and 101.7MB in the end (delta: -56.7MB). Peak memory consumption was 12.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 124.20ms. Allocated memory is still 132.1MB. Free memory was 101.7MB in the beginning and 97.1MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 2381.58ms. Allocated memory was 132.1MB in the beginning and 165.7MB in the end (delta: 33.6MB). Free memory was 97.1MB in the beginning and 85.9MB in the end (delta: 11.2MB). Peak memory consumption was 54.8MB. Max. memory is 16.1GB. * TraceAbstraction took 52347.64ms. Allocated memory was 165.7MB in the beginning and 509.6MB in the end (delta: 343.9MB). Free memory was 84.8MB in the beginning and 239.3MB in the end (delta: -154.5MB). Peak memory consumption was 267.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Maybe an infinite loop de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Maybe an infinite loop: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 02:26:01,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/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_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI --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 4e977513fd5d8adeea8c73d7c4eeb6cb821e6c768a15a7e6394764a4355fc74d --- 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-5e519f3 [2022-11-03 02:26:03,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:26:03,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:26:03,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:26:03,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:26:03,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:26:03,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:26:03,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:26:03,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:26:03,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:26:03,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:26:03,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:26:03,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:26:03,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:26:03,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:26:03,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:26:03,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:26:03,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:26:03,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:26:03,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:26:03,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:26:03,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:26:03,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:26:03,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:26:03,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:26:03,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:26:03,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:26:03,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:26:03,939 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:26:03,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:26:03,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:26:03,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:26:03,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:26:03,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:26:03,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:26:03,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:26:03,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:26:03,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:26:03,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:26:03,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:26:03,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:26:03,974 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:26:04,026 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:26:04,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:26:04,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:26:04,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:26:04,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:26:04,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:26:04,034 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:26:04,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:26:04,034 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:26:04,035 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:26:04,036 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:26:04,037 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:26:04,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:26:04,039 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:26:04,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:26:04,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:26:04,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:26:04,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:26:04,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:26:04,041 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:26:04,041 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:26:04,042 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:26:04,042 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:26:04,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:26:04,042 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:26:04,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:26:04,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:26:04,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:26:04,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:26:04,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:26:04,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:26:04,045 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:26:04,045 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:26:04,045 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:26:04,046 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:26:04,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:26:04,046 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:26:04,047 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:26:04,047 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_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e977513fd5d8adeea8c73d7c4eeb6cb821e6c768a15a7e6394764a4355fc74d [2022-11-03 02:26:04,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:26:04,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:26:04,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:26:04,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:26:04,550 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:26:04,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/email_spec11_product33.cil.c [2022-11-03 02:26:04,647 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/data/b79288fef/1ed624b9c499435396067e1882ed3607/FLAGd68d7f7bf [2022-11-03 02:26:05,479 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:26:05,480 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/sv-benchmarks/c/product-lines/email_spec11_product33.cil.c [2022-11-03 02:26:05,502 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/data/b79288fef/1ed624b9c499435396067e1882ed3607/FLAGd68d7f7bf [2022-11-03 02:26:05,700 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/data/b79288fef/1ed624b9c499435396067e1882ed3607 [2022-11-03 02:26:05,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:26:05,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:26:05,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:26:05,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:26:05,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:26:05,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:26:05" (1/1) ... [2022-11-03 02:26:05,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c9e998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:05, skipping insertion in model container [2022-11-03 02:26:05,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:26:05" (1/1) ... [2022-11-03 02:26:05,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:26:05,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:26:06,478 WARN L230 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_71db0155-6276-4987-a5fa-6d8beb2b4b2e/sv-benchmarks/c/product-lines/email_spec11_product33.cil.c[64763,64776] [2022-11-03 02:26:06,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:26:06,511 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-03 02:26:06,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:26:06,695 WARN L230 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_71db0155-6276-4987-a5fa-6d8beb2b4b2e/sv-benchmarks/c/product-lines/email_spec11_product33.cil.c[64763,64776] [2022-11-03 02:26:06,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:26:06,701 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:26:06,790 WARN L230 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_71db0155-6276-4987-a5fa-6d8beb2b4b2e/sv-benchmarks/c/product-lines/email_spec11_product33.cil.c[64763,64776] [2022-11-03 02:26:06,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:26:06,824 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:26:06,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:06 WrapperNode [2022-11-03 02:26:06,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:26:06,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:26:06,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:26:06,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:26:06,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:06" (1/1) ... [2022-11-03 02:26:06,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:06" (1/1) ... [2022-11-03 02:26:06,941 INFO L138 Inliner]: procedures = 136, calls = 227, calls flagged for inlining = 65, calls inlined = 60, statements flattened = 1005 [2022-11-03 02:26:06,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:26:06,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:26:06,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:26:06,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:26:06,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:06" (1/1) ... [2022-11-03 02:26:06,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:06" (1/1) ... [2022-11-03 02:26:06,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:06" (1/1) ... [2022-11-03 02:26:06,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:06" (1/1) ... [2022-11-03 02:26:07,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:06" (1/1) ... [2022-11-03 02:26:07,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:06" (1/1) ... [2022-11-03 02:26:07,016 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:06" (1/1) ... [2022-11-03 02:26:07,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:06" (1/1) ... [2022-11-03 02:26:07,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:26:07,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:26:07,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:26:07,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:26:07,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:06" (1/1) ... [2022-11-03 02:26:07,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:26:07,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:07,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:26:07,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:26:07,141 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-03 02:26:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-03 02:26:07,141 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-11-03 02:26:07,141 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-11-03 02:26:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-11-03 02:26:07,142 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-11-03 02:26:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-03 02:26:07,142 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-03 02:26:07,142 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-03 02:26:07,143 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-03 02:26:07,143 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-03 02:26:07,143 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-03 02:26:07,143 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-03 02:26:07,143 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-03 02:26:07,143 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-11-03 02:26:07,144 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-11-03 02:26:07,144 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-03 02:26:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-03 02:26:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-03 02:26:07,145 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-03 02:26:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-03 02:26:07,145 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-03 02:26:07,146 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-03 02:26:07,146 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2022-11-03 02:26:07,146 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2022-11-03 02:26:07,147 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-03 02:26:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-03 02:26:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:26:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-03 02:26:07,150 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-03 02:26:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-11-03 02:26:07,150 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-11-03 02:26:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-03 02:26:07,151 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-03 02:26:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-03 02:26:07,151 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-03 02:26:07,151 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-03 02:26:07,152 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-03 02:26:07,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:26:07,152 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-11-03 02:26:07,152 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-11-03 02:26:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-03 02:26:07,153 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-03 02:26:07,153 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-11-03 02:26:07,154 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-11-03 02:26:07,155 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-03 02:26:07,155 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-03 02:26:07,156 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-03 02:26:07,156 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-03 02:26:07,157 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-03 02:26:07,157 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-03 02:26:07,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:26:07,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:26:07,478 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:26:07,480 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:26:08,749 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:26:08,760 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:26:08,760 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:26:08,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:26:08 BoogieIcfgContainer [2022-11-03 02:26:08,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:26:08,766 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:26:08,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:26:08,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:26:08,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:26:05" (1/3) ... [2022-11-03 02:26:08,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e8389b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:26:08, skipping insertion in model container [2022-11-03 02:26:08,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:06" (2/3) ... [2022-11-03 02:26:08,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45e8389b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:26:08, skipping insertion in model container [2022-11-03 02:26:08,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:26:08" (3/3) ... [2022-11-03 02:26:08,773 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec11_product33.cil.c [2022-11-03 02:26:08,794 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:26:08,795 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:26:08,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:26:08,918 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;@3b4781b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:26:08,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:26:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 385 states, 297 states have (on average 1.5016835016835017) internal successors, (446), 301 states have internal predecessors, (446), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-03 02:26:08,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 02:26:08,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:08,970 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:08,971 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:08,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:08,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1565848355, now seen corresponding path program 1 times [2022-11-03 02:26:08,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:08,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597057720] [2022-11-03 02:26:08,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:08,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:08,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:08,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:09,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:26:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:09,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:26:09,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-03 02:26:09,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:09,587 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:09,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597057720] [2022-11-03 02:26:09,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597057720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:09,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:09,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:26:09,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514039073] [2022-11-03 02:26:09,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:09,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:26:09,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:09,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:26:09,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:26:09,630 INFO L87 Difference]: Start difference. First operand has 385 states, 297 states have (on average 1.5016835016835017) internal successors, (446), 301 states have internal predecessors, (446), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) Second operand has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:09,750 INFO L93 Difference]: Finished difference Result 611 states and 886 transitions. [2022-11-03 02:26:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:26:09,752 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 139 [2022-11-03 02:26:09,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:09,769 INFO L225 Difference]: With dead ends: 611 [2022-11-03 02:26:09,770 INFO L226 Difference]: Without dead ends: 378 [2022-11-03 02:26:09,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:26:09,780 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:09,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:09,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-03 02:26:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-11-03 02:26:09,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 291 states have (on average 1.4948453608247423) internal successors, (435), 294 states have internal predecessors, (435), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-11-03 02:26:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 558 transitions. [2022-11-03 02:26:09,869 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 558 transitions. Word has length 139 [2022-11-03 02:26:09,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:09,872 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 558 transitions. [2022-11-03 02:26:09,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.5) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:09,873 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 558 transitions. [2022-11-03 02:26:09,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 02:26:09,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:09,880 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:09,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:10,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:10,106 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:10,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:10,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1479941590, now seen corresponding path program 1 times [2022-11-03 02:26:10,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:10,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168044448] [2022-11-03 02:26:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:10,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:10,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:10,110 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:10,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:26:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:10,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:26:10,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:26:10,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:10,641 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:10,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168044448] [2022-11-03 02:26:10,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168044448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:10,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:10,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:26:10,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550702649] [2022-11-03 02:26:10,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:10,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:26:10,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:10,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:26:10,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:26:10,645 INFO L87 Difference]: Start difference. First operand 378 states and 558 transitions. Second operand has 5 states, 4 states have (on average 20.75) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:10,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:10,806 INFO L93 Difference]: Finished difference Result 747 states and 1106 transitions. [2022-11-03 02:26:10,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 20.75) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 140 [2022-11-03 02:26:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:10,817 INFO L225 Difference]: With dead ends: 747 [2022-11-03 02:26:10,818 INFO L226 Difference]: Without dead ends: 380 [2022-11-03 02:26:10,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:26:10,825 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 133 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:10,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 2043 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:10,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-03 02:26:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-11-03 02:26:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 292 states have (on average 1.4931506849315068) internal successors, (436), 296 states have internal predecessors, (436), 62 states have call successors, (62), 24 states have call predecessors, (62), 25 states have return successors, (63), 61 states have call predecessors, (63), 61 states have call successors, (63) [2022-11-03 02:26:10,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 561 transitions. [2022-11-03 02:26:10,893 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 561 transitions. Word has length 140 [2022-11-03 02:26:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:10,895 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 561 transitions. [2022-11-03 02:26:10,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 20.75) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 561 transitions. [2022-11-03 02:26:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-03 02:26:10,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:10,904 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:10,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:11,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:11,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:11,119 INFO L85 PathProgramCache]: Analyzing trace with hash -824255159, now seen corresponding path program 1 times [2022-11-03 02:26:11,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:11,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842963886] [2022-11-03 02:26:11,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:11,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:11,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:11,127 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:11,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:26:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:11,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:26:11,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-03 02:26:11,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:11,616 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:11,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842963886] [2022-11-03 02:26:11,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842963886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:11,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:11,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:26:11,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132266835] [2022-11-03 02:26:11,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:11,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:26:11,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:11,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:26:11,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:26:11,628 INFO L87 Difference]: Start difference. First operand 380 states and 561 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:11,773 INFO L93 Difference]: Finished difference Result 749 states and 1110 transitions. [2022-11-03 02:26:11,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:11,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 141 [2022-11-03 02:26:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:11,779 INFO L225 Difference]: With dead ends: 749 [2022-11-03 02:26:11,779 INFO L226 Difference]: Without dead ends: 382 [2022-11-03 02:26:11,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:26:11,785 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 132 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:11,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 2032 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-03 02:26:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-11-03 02:26:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 293 states have (on average 1.4914675767918089) internal successors, (437), 298 states have internal predecessors, (437), 62 states have call successors, (62), 24 states have call predecessors, (62), 26 states have return successors, (67), 61 states have call predecessors, (67), 61 states have call successors, (67) [2022-11-03 02:26:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 566 transitions. [2022-11-03 02:26:11,840 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 566 transitions. Word has length 141 [2022-11-03 02:26:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:11,840 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 566 transitions. [2022-11-03 02:26:11,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 566 transitions. [2022-11-03 02:26:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 02:26:11,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:11,852 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:11,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:12,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:12,071 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:12,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:12,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2015273453, now seen corresponding path program 1 times [2022-11-03 02:26:12,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:12,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606160425] [2022-11-03 02:26:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:12,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:12,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:12,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:12,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:26:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:12,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:26:12,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:26:12,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:12,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:12,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606160425] [2022-11-03 02:26:12,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606160425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:12,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:12,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:26:12,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680075793] [2022-11-03 02:26:12,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:12,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:26:12,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:12,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:26:12,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:26:12,517 INFO L87 Difference]: Start difference. First operand 382 states and 566 transitions. Second operand has 5 states, 4 states have (on average 21.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:12,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:12,631 INFO L93 Difference]: Finished difference Result 741 states and 1100 transitions. [2022-11-03 02:26:12,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:12,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 21.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 142 [2022-11-03 02:26:12,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:12,636 INFO L225 Difference]: With dead ends: 741 [2022-11-03 02:26:12,636 INFO L226 Difference]: Without dead ends: 382 [2022-11-03 02:26:12,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:26:12,644 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 131 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:12,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 2046 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:12,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-11-03 02:26:12,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-11-03 02:26:12,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 293 states have (on average 1.4914675767918089) internal successors, (437), 298 states have internal predecessors, (437), 62 states have call successors, (62), 24 states have call predecessors, (62), 26 states have return successors, (66), 61 states have call predecessors, (66), 61 states have call successors, (66) [2022-11-03 02:26:12,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 565 transitions. [2022-11-03 02:26:12,688 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 565 transitions. Word has length 142 [2022-11-03 02:26:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:12,689 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 565 transitions. [2022-11-03 02:26:12,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 21.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:12,690 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 565 transitions. [2022-11-03 02:26:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 02:26:12,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:12,693 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:12,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:12,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:12,911 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:12,911 INFO L85 PathProgramCache]: Analyzing trace with hash 898347668, now seen corresponding path program 2 times [2022-11-03 02:26:12,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:12,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859646391] [2022-11-03 02:26:12,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:26:12,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:12,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:12,913 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:12,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:26:13,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-03 02:26:13,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:26:13,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:26:13,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-03 02:26:13,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:13,240 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:13,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859646391] [2022-11-03 02:26:13,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859646391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:13,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:13,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:13,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496451821] [2022-11-03 02:26:13,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:13,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:13,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:13,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:13,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:13,243 INFO L87 Difference]: Start difference. First operand 382 states and 565 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:13,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:13,283 INFO L93 Difference]: Finished difference Result 605 states and 874 transitions. [2022-11-03 02:26:13,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:13,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 143 [2022-11-03 02:26:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:13,290 INFO L225 Difference]: With dead ends: 605 [2022-11-03 02:26:13,290 INFO L226 Difference]: Without dead ends: 385 [2022-11-03 02:26:13,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:13,292 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 1 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:13,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1110 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-03 02:26:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 384. [2022-11-03 02:26:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 295 states have (on average 1.488135593220339) internal successors, (439), 300 states have internal predecessors, (439), 62 states have call successors, (62), 24 states have call predecessors, (62), 26 states have return successors, (66), 61 states have call predecessors, (66), 61 states have call successors, (66) [2022-11-03 02:26:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 567 transitions. [2022-11-03 02:26:13,333 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 567 transitions. Word has length 143 [2022-11-03 02:26:13,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:13,333 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 567 transitions. [2022-11-03 02:26:13,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 567 transitions. [2022-11-03 02:26:13,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 02:26:13,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:13,339 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:13,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:13,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:13,564 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:13,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1681302114, now seen corresponding path program 1 times [2022-11-03 02:26:13,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:13,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282421912] [2022-11-03 02:26:13,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:13,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:13,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:13,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:26:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:13,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:26:13,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:26:14,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:14,040 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:14,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282421912] [2022-11-03 02:26:14,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282421912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:14,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:14,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:26:14,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44479799] [2022-11-03 02:26:14,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:14,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:26:14,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:14,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:26:14,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:26:14,043 INFO L87 Difference]: Start difference. First operand 384 states and 567 transitions. Second operand has 5 states, 4 states have (on average 23.25) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:14,137 INFO L93 Difference]: Finished difference Result 747 states and 1107 transitions. [2022-11-03 02:26:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 23.25) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 152 [2022-11-03 02:26:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:14,143 INFO L225 Difference]: With dead ends: 747 [2022-11-03 02:26:14,144 INFO L226 Difference]: Without dead ends: 386 [2022-11-03 02:26:14,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:26:14,147 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 129 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:14,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 2048 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-03 02:26:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2022-11-03 02:26:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 296 states have (on average 1.4864864864864864) internal successors, (440), 302 states have internal predecessors, (440), 62 states have call successors, (62), 24 states have call predecessors, (62), 27 states have return successors, (68), 61 states have call predecessors, (68), 61 states have call successors, (68) [2022-11-03 02:26:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 570 transitions. [2022-11-03 02:26:14,183 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 570 transitions. Word has length 152 [2022-11-03 02:26:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:14,185 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 570 transitions. [2022-11-03 02:26:14,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 23.25) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 570 transitions. [2022-11-03 02:26:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 02:26:14,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:14,189 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:14,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:14,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:14,415 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:14,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:14,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1312789604, now seen corresponding path program 1 times [2022-11-03 02:26:14,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:14,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544126253] [2022-11-03 02:26:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:14,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:14,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:14,418 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:14,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:26:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:14,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:26:14,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:26:14,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:14,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:14,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544126253] [2022-11-03 02:26:14,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544126253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:14,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:14,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:26:14,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577388223] [2022-11-03 02:26:14,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:14,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:26:14,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:14,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:26:14,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:26:14,857 INFO L87 Difference]: Start difference. First operand 386 states and 570 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:14,986 INFO L93 Difference]: Finished difference Result 745 states and 1102 transitions. [2022-11-03 02:26:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:14,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 153 [2022-11-03 02:26:14,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:14,992 INFO L225 Difference]: With dead ends: 745 [2022-11-03 02:26:14,992 INFO L226 Difference]: Without dead ends: 386 [2022-11-03 02:26:14,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:26:14,995 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 130 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:14,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 2035 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-03 02:26:15,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2022-11-03 02:26:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 296 states have (on average 1.4864864864864864) internal successors, (440), 302 states have internal predecessors, (440), 62 states have call successors, (62), 24 states have call predecessors, (62), 27 states have return successors, (67), 61 states have call predecessors, (67), 61 states have call successors, (67) [2022-11-03 02:26:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 569 transitions. [2022-11-03 02:26:15,029 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 569 transitions. Word has length 153 [2022-11-03 02:26:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:15,030 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 569 transitions. [2022-11-03 02:26:15,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 569 transitions. [2022-11-03 02:26:15,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-03 02:26:15,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:15,033 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:15,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:15,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:15,247 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:15,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:15,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1444576212, now seen corresponding path program 2 times [2022-11-03 02:26:15,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:15,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628203436] [2022-11-03 02:26:15,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:26:15,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:15,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:15,250 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:15,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:26:15,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:26:15,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:26:15,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:26:15,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:15,972 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:26:15,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:26:16,467 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:16,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628203436] [2022-11-03 02:26:16,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628203436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:16,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [471400474] [2022-11-03 02:26:16,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:26:16,468 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:26:16,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:26:16,472 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:26:16,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 02:26:17,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:26:17,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:26:17,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:26:17,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:26:17,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:17,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [471400474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:17,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:26:17,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 9] total 17 [2022-11-03 02:26:17,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751030732] [2022-11-03 02:26:17,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:17,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:17,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:17,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:17,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:26:17,149 INFO L87 Difference]: Start difference. First operand 386 states and 569 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:17,198 INFO L93 Difference]: Finished difference Result 803 states and 1200 transitions. [2022-11-03 02:26:17,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:17,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 154 [2022-11-03 02:26:17,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:17,202 INFO L225 Difference]: With dead ends: 803 [2022-11-03 02:26:17,202 INFO L226 Difference]: Without dead ends: 448 [2022-11-03 02:26:17,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:26:17,204 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 115 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:17,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1089 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:17,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-03 02:26:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 440. [2022-11-03 02:26:17,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 339 states have (on average 1.5044247787610618) internal successors, (510), 345 states have internal predecessors, (510), 73 states have call successors, (73), 24 states have call predecessors, (73), 27 states have return successors, (79), 72 states have call predecessors, (79), 72 states have call successors, (79) [2022-11-03 02:26:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 662 transitions. [2022-11-03 02:26:17,242 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 662 transitions. Word has length 154 [2022-11-03 02:26:17,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:17,243 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 662 transitions. [2022-11-03 02:26:17,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 662 transitions. [2022-11-03 02:26:17,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 02:26:17,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:17,248 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:17,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:17,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:17,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:26:17,663 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:17,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:17,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2139218771, now seen corresponding path program 1 times [2022-11-03 02:26:17,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:17,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970858988] [2022-11-03 02:26:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:17,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:17,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:17,666 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:17,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:26:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:18,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:26:18,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-03 02:26:18,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:18,120 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970858988] [2022-11-03 02:26:18,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970858988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:18,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:18,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:26:18,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149274496] [2022-11-03 02:26:18,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:18,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:26:18,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:18,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:26:18,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:26:18,123 INFO L87 Difference]: Start difference. First operand 440 states and 662 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:18,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:18,281 INFO L93 Difference]: Finished difference Result 855 states and 1294 transitions. [2022-11-03 02:26:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:18,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 155 [2022-11-03 02:26:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:18,285 INFO L225 Difference]: With dead ends: 855 [2022-11-03 02:26:18,285 INFO L226 Difference]: Without dead ends: 442 [2022-11-03 02:26:18,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:26:18,287 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 128 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:18,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 2037 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-03 02:26:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-11-03 02:26:18,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 340 states have (on average 1.5029411764705882) internal successors, (511), 347 states have internal predecessors, (511), 73 states have call successors, (73), 24 states have call predecessors, (73), 28 states have return successors, (84), 72 states have call predecessors, (84), 72 states have call successors, (84) [2022-11-03 02:26:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 668 transitions. [2022-11-03 02:26:18,327 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 668 transitions. Word has length 155 [2022-11-03 02:26:18,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:18,328 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 668 transitions. [2022-11-03 02:26:18,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:18,328 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 668 transitions. [2022-11-03 02:26:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 02:26:18,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:18,332 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:18,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:18,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:18,547 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:18,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:18,547 INFO L85 PathProgramCache]: Analyzing trace with hash -811085194, now seen corresponding path program 1 times [2022-11-03 02:26:18,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:18,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121321896] [2022-11-03 02:26:18,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:18,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:18,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:18,550 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:18,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:26:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:18,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:26:18,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:26:19,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:19,074 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:19,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121321896] [2022-11-03 02:26:19,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121321896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:19,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:19,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:26:19,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595641798] [2022-11-03 02:26:19,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:19,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:26:19,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:19,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:26:19,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:26:19,077 INFO L87 Difference]: Start difference. First operand 442 states and 668 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:19,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:19,304 INFO L93 Difference]: Finished difference Result 1004 states and 1540 transitions. [2022-11-03 02:26:19,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:26:19,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 156 [2022-11-03 02:26:19,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:19,309 INFO L225 Difference]: With dead ends: 1004 [2022-11-03 02:26:19,310 INFO L226 Difference]: Without dead ends: 591 [2022-11-03 02:26:19,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:26:19,313 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 647 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:19,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1286 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:19,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-11-03 02:26:19,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 450. [2022-11-03 02:26:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 347 states have (on average 1.4899135446685878) internal successors, (517), 353 states have internal predecessors, (517), 73 states have call successors, (73), 26 states have call predecessors, (73), 29 states have return successors, (80), 72 states have call predecessors, (80), 72 states have call successors, (80) [2022-11-03 02:26:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 670 transitions. [2022-11-03 02:26:19,376 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 670 transitions. Word has length 156 [2022-11-03 02:26:19,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:19,389 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 670 transitions. [2022-11-03 02:26:19,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 02:26:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 670 transitions. [2022-11-03 02:26:19,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-03 02:26:19,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:19,393 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:19,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:19,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:19,613 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:19,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1006078272, now seen corresponding path program 1 times [2022-11-03 02:26:19,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:19,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346939154] [2022-11-03 02:26:19,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:19,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:19,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:19,617 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:19,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:26:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:20,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:26:20,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:26:20,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:26:20,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:20,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346939154] [2022-11-03 02:26:20,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346939154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:20,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1232338750] [2022-11-03 02:26:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:20,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:26:20,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:26:20,207 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:26:20,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 02:26:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:20,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:26:20,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:26:21,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:21,478 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:26:21,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1232338750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:21,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955224734] [2022-11-03 02:26:21,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:21,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:21,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:21,486 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:21,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:26:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:21,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:26:21,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:26:21,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:26:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-03 02:26:22,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955224734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:26:22,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:26:22,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 9, 9, 9, 9] total 20 [2022-11-03 02:26:22,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672132246] [2022-11-03 02:26:22,272 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:26:22,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-03 02:26:22,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:22,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-03 02:26:22,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:26:22,274 INFO L87 Difference]: Start difference. First operand 450 states and 670 transitions. Second operand has 20 states, 20 states have (on average 10.75) internal successors, (215), 18 states have internal predecessors, (215), 4 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (44), 6 states have call predecessors, (44), 4 states have call successors, (44) [2022-11-03 02:26:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:34,795 INFO L93 Difference]: Finished difference Result 2577 states and 4090 transitions. [2022-11-03 02:26:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:26:34,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 10.75) internal successors, (215), 18 states have internal predecessors, (215), 4 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (44), 6 states have call predecessors, (44), 4 states have call successors, (44) Word has length 157 [2022-11-03 02:26:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:34,809 INFO L225 Difference]: With dead ends: 2577 [2022-11-03 02:26:34,810 INFO L226 Difference]: Without dead ends: 2357 [2022-11-03 02:26:34,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 964 GetRequests, 924 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=243, Invalid=1479, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:26:34,815 INFO L413 NwaCegarLoop]: 968 mSDtfsCounter, 4120 mSDsluCounter, 3937 mSDsCounter, 0 mSdLazyCounter, 9627 mSolverCounterSat, 1454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4206 SdHoareTripleChecker+Valid, 4905 SdHoareTripleChecker+Invalid, 11081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1454 IncrementalHoareTripleChecker+Valid, 9627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:34,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4206 Valid, 4905 Invalid, 11081 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1454 Valid, 9627 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2022-11-03 02:26:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2022-11-03 02:26:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 1585. [2022-11-03 02:26:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1253 states have (on average 1.5466879489225858) internal successors, (1938), 1264 states have internal predecessors, (1938), 272 states have call successors, (272), 51 states have call predecessors, (272), 59 states have return successors, (336), 273 states have call predecessors, (336), 270 states have call successors, (336) [2022-11-03 02:26:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 2546 transitions. [2022-11-03 02:26:35,094 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 2546 transitions. Word has length 157 [2022-11-03 02:26:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:35,095 INFO L495 AbstractCegarLoop]: Abstraction has 1585 states and 2546 transitions. [2022-11-03 02:26:35,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.75) internal successors, (215), 18 states have internal predecessors, (215), 4 states have call successors, (48), 6 states have call predecessors, (48), 9 states have return successors, (44), 6 states have call predecessors, (44), 4 states have call successors, (44) [2022-11-03 02:26:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 2546 transitions. [2022-11-03 02:26:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:26:35,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:35,104 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:35,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:35,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:35,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:35,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:26:35,731 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:35,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:35,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1668704546, now seen corresponding path program 1 times [2022-11-03 02:26:35,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:35,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772237325] [2022-11-03 02:26:35,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:35,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:35,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:35,734 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:35,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:26:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:36,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:26:36,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:26:36,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:36,050 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:36,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772237325] [2022-11-03 02:26:36,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772237325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:36,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:36,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:36,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010568717] [2022-11-03 02:26:36,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:36,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:36,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:36,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:36,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:36,053 INFO L87 Difference]: Start difference. First operand 1585 states and 2546 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:36,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:36,392 INFO L93 Difference]: Finished difference Result 3683 states and 6045 transitions. [2022-11-03 02:26:36,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:36,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 160 [2022-11-03 02:26:36,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:36,413 INFO L225 Difference]: With dead ends: 3683 [2022-11-03 02:26:36,413 INFO L226 Difference]: Without dead ends: 2251 [2022-11-03 02:26:36,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:36,419 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 109 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:36,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 1117 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2022-11-03 02:26:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 2235. [2022-11-03 02:26:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 1775 states have (on average 1.5707042253521126) internal successors, (2788), 1786 states have internal predecessors, (2788), 400 states have call successors, (400), 51 states have call predecessors, (400), 59 states have return successors, (504), 401 states have call predecessors, (504), 398 states have call successors, (504) [2022-11-03 02:26:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 3692 transitions. [2022-11-03 02:26:36,735 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 3692 transitions. Word has length 160 [2022-11-03 02:26:36,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:36,735 INFO L495 AbstractCegarLoop]: Abstraction has 2235 states and 3692 transitions. [2022-11-03 02:26:36,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:36,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 3692 transitions. [2022-11-03 02:26:36,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-03 02:26:36,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:36,749 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:36,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:36,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:36,966 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:36,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:36,966 INFO L85 PathProgramCache]: Analyzing trace with hash -403382642, now seen corresponding path program 1 times [2022-11-03 02:26:36,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:36,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278404328] [2022-11-03 02:26:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:36,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:36,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:36,968 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:36,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-03 02:26:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:37,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:26:37,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:26:37,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:37,358 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:37,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278404328] [2022-11-03 02:26:37,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278404328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:37,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:37,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:37,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206684229] [2022-11-03 02:26:37,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:37,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:37,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:37,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:37,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:37,361 INFO L87 Difference]: Start difference. First operand 2235 states and 3692 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:37,799 INFO L93 Difference]: Finished difference Result 5283 states and 8803 transitions. [2022-11-03 02:26:37,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:37,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 161 [2022-11-03 02:26:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:37,826 INFO L225 Difference]: With dead ends: 5283 [2022-11-03 02:26:37,826 INFO L226 Difference]: Without dead ends: 3307 [2022-11-03 02:26:37,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:37,836 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 107 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:37,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1122 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:37,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2022-11-03 02:26:38,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 3291. [2022-11-03 02:26:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 2641 states have (on average 1.5789473684210527) internal successors, (4170), 2652 states have internal predecessors, (4170), 590 states have call successors, (590), 51 states have call predecessors, (590), 59 states have return successors, (726), 591 states have call predecessors, (726), 588 states have call successors, (726) [2022-11-03 02:26:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 5486 transitions. [2022-11-03 02:26:38,611 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 5486 transitions. Word has length 161 [2022-11-03 02:26:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:38,612 INFO L495 AbstractCegarLoop]: Abstraction has 3291 states and 5486 transitions. [2022-11-03 02:26:38,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 5486 transitions. [2022-11-03 02:26:38,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-03 02:26:38,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:38,633 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:38,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:38,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:38,851 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:38,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:38,851 INFO L85 PathProgramCache]: Analyzing trace with hash 33950928, now seen corresponding path program 1 times [2022-11-03 02:26:38,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:38,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380167139] [2022-11-03 02:26:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:38,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:38,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:38,852 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:38,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 02:26:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:39,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:26:39,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:26:39,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:39,217 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:39,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380167139] [2022-11-03 02:26:39,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380167139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:39,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:39,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:39,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022816400] [2022-11-03 02:26:39,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:39,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:39,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:39,220 INFO L87 Difference]: Start difference. First operand 3291 states and 5486 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:39,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:39,899 INFO L93 Difference]: Finished difference Result 7675 states and 12925 transitions. [2022-11-03 02:26:39,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:39,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 162 [2022-11-03 02:26:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:39,935 INFO L225 Difference]: With dead ends: 7675 [2022-11-03 02:26:39,935 INFO L226 Difference]: Without dead ends: 4909 [2022-11-03 02:26:39,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:39,949 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 105 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:39,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 1109 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:39,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4909 states. [2022-11-03 02:26:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4909 to 4893. [2022-11-03 02:26:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 3997 states have (on average 1.5851888916687515) internal successors, (6336), 4008 states have internal predecessors, (6336), 836 states have call successors, (836), 51 states have call predecessors, (836), 59 states have return successors, (1056), 837 states have call predecessors, (1056), 834 states have call successors, (1056) [2022-11-03 02:26:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 8228 transitions. [2022-11-03 02:26:40,999 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 8228 transitions. Word has length 162 [2022-11-03 02:26:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:40,999 INFO L495 AbstractCegarLoop]: Abstraction has 4893 states and 8228 transitions. [2022-11-03 02:26:41,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:41,000 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 8228 transitions. [2022-11-03 02:26:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 02:26:41,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:41,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:41,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:41,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:41,252 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:41,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2051395981, now seen corresponding path program 1 times [2022-11-03 02:26:41,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:41,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291792830] [2022-11-03 02:26:41,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:41,253 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:41,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:41,254 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:41,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:26:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:41,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:26:41,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:26:41,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:41,634 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:41,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291792830] [2022-11-03 02:26:41,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291792830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:41,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:41,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:41,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864835669] [2022-11-03 02:26:41,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:41,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:41,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:41,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:41,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:41,637 INFO L87 Difference]: Start difference. First operand 4893 states and 8228 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:42,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:42,797 INFO L93 Difference]: Finished difference Result 11407 states and 19363 transitions. [2022-11-03 02:26:42,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:42,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 163 [2022-11-03 02:26:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:42,845 INFO L225 Difference]: With dead ends: 11407 [2022-11-03 02:26:42,845 INFO L226 Difference]: Without dead ends: 7471 [2022-11-03 02:26:42,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:42,864 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 103 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:42,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1109 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7471 states. [2022-11-03 02:26:43,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7471 to 7455. [2022-11-03 02:26:43,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 6201 states have (on average 1.5890985324947589) internal successors, (9854), 6212 states have internal predecessors, (9854), 1194 states have call successors, (1194), 51 states have call predecessors, (1194), 59 states have return successors, (1554), 1195 states have call predecessors, (1554), 1192 states have call successors, (1554) [2022-11-03 02:26:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 12602 transitions. [2022-11-03 02:26:44,003 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 12602 transitions. Word has length 163 [2022-11-03 02:26:44,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:44,004 INFO L495 AbstractCegarLoop]: Abstraction has 7455 states and 12602 transitions. [2022-11-03 02:26:44,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:44,004 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 12602 transitions. [2022-11-03 02:26:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-03 02:26:44,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:44,047 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:44,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:44,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:44,261 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:44,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:44,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1828024620, now seen corresponding path program 1 times [2022-11-03 02:26:44,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:44,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854257376] [2022-11-03 02:26:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:44,262 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:44,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:44,264 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:44,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:26:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:44,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:26:44,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:26:44,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:44,620 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:44,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854257376] [2022-11-03 02:26:44,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854257376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:44,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:44,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:44,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797588950] [2022-11-03 02:26:44,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:44,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:44,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:44,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:44,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:44,625 INFO L87 Difference]: Start difference. First operand 7455 states and 12602 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:46,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:46,046 INFO L93 Difference]: Finished difference Result 17551 states and 29949 transitions. [2022-11-03 02:26:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:46,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 164 [2022-11-03 02:26:46,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:46,107 INFO L225 Difference]: With dead ends: 17551 [2022-11-03 02:26:46,107 INFO L226 Difference]: Without dead ends: 11709 [2022-11-03 02:26:46,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:46,131 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 101 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:46,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1116 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:46,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2022-11-03 02:26:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11693. [2022-11-03 02:26:48,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11693 states, 9687 states have (on average 1.58294621657892) internal successors, (15334), 9698 states have internal predecessors, (15334), 1946 states have call successors, (1946), 51 states have call predecessors, (1946), 59 states have return successors, (2550), 1947 states have call predecessors, (2550), 1944 states have call successors, (2550) [2022-11-03 02:26:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11693 states to 11693 states and 19830 transitions. [2022-11-03 02:26:48,190 INFO L78 Accepts]: Start accepts. Automaton has 11693 states and 19830 transitions. Word has length 164 [2022-11-03 02:26:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:48,191 INFO L495 AbstractCegarLoop]: Abstraction has 11693 states and 19830 transitions. [2022-11-03 02:26:48,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 11693 states and 19830 transitions. [2022-11-03 02:26:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-03 02:26:48,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:48,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:48,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:48,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:48,463 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:48,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:48,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1429779337, now seen corresponding path program 1 times [2022-11-03 02:26:48,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:48,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376690342] [2022-11-03 02:26:48,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:48,464 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:48,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:48,467 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:48,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:26:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:48,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:26:48,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:48,897 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:26:48,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:48,897 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:48,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376690342] [2022-11-03 02:26:48,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376690342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:48,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:48,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:48,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438793842] [2022-11-03 02:26:48,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:48,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:48,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:48,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:48,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:48,901 INFO L87 Difference]: Start difference. First operand 11693 states and 19830 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:51,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:51,536 INFO L93 Difference]: Finished difference Result 28673 states and 48873 transitions. [2022-11-03 02:26:51,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:26:51,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 165 [2022-11-03 02:26:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:51,624 INFO L225 Difference]: With dead ends: 28673 [2022-11-03 02:26:51,624 INFO L226 Difference]: Without dead ends: 19387 [2022-11-03 02:26:51,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:51,655 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 99 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:51,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1122 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:26:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19387 states. [2022-11-03 02:26:55,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19387 to 19371. [2022-11-03 02:26:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19371 states, 16153 states have (on average 1.5810066241565035) internal successors, (25538), 16164 states have internal predecessors, (25538), 3158 states have call successors, (3158), 51 states have call predecessors, (3158), 59 states have return successors, (4062), 3159 states have call predecessors, (4062), 3156 states have call successors, (4062) [2022-11-03 02:26:55,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19371 states to 19371 states and 32758 transitions. [2022-11-03 02:26:55,153 INFO L78 Accepts]: Start accepts. Automaton has 19371 states and 32758 transitions. Word has length 165 [2022-11-03 02:26:55,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:55,154 INFO L495 AbstractCegarLoop]: Abstraction has 19371 states and 32758 transitions. [2022-11-03 02:26:55,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:26:55,154 INFO L276 IsEmpty]: Start isEmpty. Operand 19371 states and 32758 transitions. [2022-11-03 02:26:55,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-03 02:26:55,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:55,232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:55,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:55,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:26:55,449 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION === [outgoingErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:55,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:55,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1485541786, now seen corresponding path program 1 times [2022-11-03 02:26:55,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:26:55,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625056046] [2022-11-03 02:26:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:55,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:26:55,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:26:55,452 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:26:55,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71db0155-6276-4987-a5fa-6d8beb2b4b2e/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:26:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:55,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:26:55,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-03 02:26:55,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:26:55,873 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:26:55,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625056046] [2022-11-03 02:26:55,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625056046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:55,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:55,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:26:55,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151222420] [2022-11-03 02:26:55,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:55,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:26:55,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:26:55,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:26:55,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:26:55,876 INFO L87 Difference]: Start difference. First operand 19371 states and 32758 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:27:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:00,861 INFO L93 Difference]: Finished difference Result 49881 states and 84805 transitions. [2022-11-03 02:27:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:27:00,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 166 [2022-11-03 02:27:00,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:01,031 INFO L225 Difference]: With dead ends: 49881 [2022-11-03 02:27:01,031 INFO L226 Difference]: Without dead ends: 33869 [2022-11-03 02:27:01,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:01,080 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 97 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:01,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1131 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:27:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33869 states.