./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P --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 ef0a7247f371c06426a6fd229da0de853cef924cb960a979813f84bccc63d5fc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:10:14,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:10:14,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:10:14,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:10:14,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:10:14,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:10:14,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:10:14,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:10:14,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:10:14,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:10:14,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:10:14,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:10:14,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:10:14,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:10:14,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:10:14,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:10:14,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:10:14,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:10:14,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:10:14,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:10:14,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:10:14,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:10:14,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:10:14,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:10:14,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:10:14,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:10:14,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:10:14,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:10:14,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:10:14,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:10:14,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:10:14,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:10:14,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:10:14,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:10:14,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:10:14,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:10:14,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:10:14,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:10:14,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:10:14,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:10:14,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:10:14,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:10:14,332 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:10:14,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:10:14,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:10:14,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:10:14,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:10:14,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:10:14,341 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:10:14,341 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:10:14,341 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:10:14,341 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:10:14,342 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:10:14,343 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:10:14,343 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:10:14,343 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:10:14,343 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:10:14,344 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:10:14,344 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:10:14,344 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:10:14,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:10:14,346 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:10:14,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:10:14,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:10:14,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:10:14,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:10:14,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:10:14,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:10:14,349 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:10:14,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:10:14,349 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:10:14,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:10:14,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:10:14,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:10:14,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:10:14,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:10:14,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:10:14,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:10:14,352 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:10:14,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:10:14,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:10:14,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:10:14,353 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:10:14,353 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef0a7247f371c06426a6fd229da0de853cef924cb960a979813f84bccc63d5fc [2021-11-21 01:10:14,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:10:14,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:10:14,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:10:14,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:10:14,636 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:10:14,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-1.c [2021-11-21 01:10:14,695 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/data/884f3b4f1/5341414d1d2247129e089a3309416fe8/FLAG39e876fa0 [2021-11-21 01:10:15,210 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:10:15,212 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-1.c [2021-11-21 01:10:15,226 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/data/884f3b4f1/5341414d1d2247129e089a3309416fe8/FLAG39e876fa0 [2021-11-21 01:10:15,558 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/data/884f3b4f1/5341414d1d2247129e089a3309416fe8 [2021-11-21 01:10:15,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:10:15,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:10:15,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:10:15,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:10:15,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:10:15,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:10:15" (1/1) ... [2021-11-21 01:10:15,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df6a16b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:15, skipping insertion in model container [2021-11-21 01:10:15,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:10:15" (1/1) ... [2021-11-21 01:10:15,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:10:15,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:10:15,913 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_f487529b-061a-47f6-901b-978ebe0f8ad8/sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-1.c[35886,35899] [2021-11-21 01:10:15,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:10:15,937 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:10:16,014 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_f487529b-061a-47f6-901b-978ebe0f8ad8/sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-1.c[35886,35899] [2021-11-21 01:10:16,016 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:10:16,029 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:10:16,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:16 WrapperNode [2021-11-21 01:10:16,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:10:16,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:10:16,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:10:16,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:10:16,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:16" (1/1) ... [2021-11-21 01:10:16,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:16" (1/1) ... [2021-11-21 01:10:16,102 INFO L137 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 508 [2021-11-21 01:10:16,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:10:16,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:10:16,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:10:16,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:10:16,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:16" (1/1) ... [2021-11-21 01:10:16,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:16" (1/1) ... [2021-11-21 01:10:16,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:16" (1/1) ... [2021-11-21 01:10:16,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:16" (1/1) ... [2021-11-21 01:10:16,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:16" (1/1) ... [2021-11-21 01:10:16,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:16" (1/1) ... [2021-11-21 01:10:16,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:16" (1/1) ... [2021-11-21 01:10:16,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:10:16,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:10:16,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:10:16,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:10:16,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:16" (1/1) ... [2021-11-21 01:10:16,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:10:16,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:10:16,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:10:16,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:10:16,256 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:10:16,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:10:16,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:10:16,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:10:16,348 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:10:16,350 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:10:16,379 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-21 01:10:16,894 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-11-21 01:10:16,894 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-11-21 01:10:16,894 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:10:17,042 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:10:17,042 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:10:17,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:10:17 BoogieIcfgContainer [2021-11-21 01:10:17,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:10:17,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:10:17,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:10:17,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:10:17,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:10:15" (1/3) ... [2021-11-21 01:10:17,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f15cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:10:17, skipping insertion in model container [2021-11-21 01:10:17,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:10:16" (2/3) ... [2021-11-21 01:10:17,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56f15cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:10:17, skipping insertion in model container [2021-11-21 01:10:17,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:10:17" (3/3) ... [2021-11-21 01:10:17,054 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_4.cil-1.c [2021-11-21 01:10:17,059 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:10:17,059 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:10:17,113 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:10:17,119 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:10:17,120 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:10:17,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 84 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:10:17,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:17,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:17,142 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:17,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:17,148 INFO L85 PathProgramCache]: Analyzing trace with hash 602199862, now seen corresponding path program 1 times [2021-11-21 01:10:17,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:10:17,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106867057] [2021-11-21 01:10:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:17,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:10:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:10:17,406 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:10:17,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106867057] [2021-11-21 01:10:17,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106867057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:10:17,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:10:17,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:10:17,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428882062] [2021-11-21 01:10:17,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:10:17,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:10:17,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:10:17,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:10:17,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:10:17,453 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 84 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:10:17,672 INFO L93 Difference]: Finished difference Result 171 states and 295 transitions. [2021-11-21 01:10:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:10:17,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-21 01:10:17,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:10:17,685 INFO L225 Difference]: With dead ends: 171 [2021-11-21 01:10:17,686 INFO L226 Difference]: Without dead ends: 84 [2021-11-21 01:10:17,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:10:17,692 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:10:17,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 180 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:10:17,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-21 01:10:17,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-21 01:10:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 83 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 121 transitions. [2021-11-21 01:10:17,731 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 121 transitions. Word has length 19 [2021-11-21 01:10:17,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:10:17,732 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 121 transitions. [2021-11-21 01:10:17,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 121 transitions. [2021-11-21 01:10:17,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 01:10:17,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:17,734 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:17,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:10:17,735 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:17,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:17,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2014871544, now seen corresponding path program 1 times [2021-11-21 01:10:17,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:10:17,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715605061] [2021-11-21 01:10:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:17,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:10:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:10:17,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:10:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715605061] [2021-11-21 01:10:17,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715605061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:10:17,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:10:17,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:10:17,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415258805] [2021-11-21 01:10:17,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:10:17,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:10:17,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:10:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:10:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:10:17,838 INFO L87 Difference]: Start difference. First operand 84 states and 121 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:10:18,000 INFO L93 Difference]: Finished difference Result 180 states and 263 transitions. [2021-11-21 01:10:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:10:18,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-21 01:10:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:10:18,007 INFO L225 Difference]: With dead ends: 180 [2021-11-21 01:10:18,007 INFO L226 Difference]: Without dead ends: 99 [2021-11-21 01:10:18,013 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:10:18,015 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:10:18,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 130 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:10:18,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-21 01:10:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-11-21 01:10:18,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.4270833333333333) internal successors, (137), 96 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 137 transitions. [2021-11-21 01:10:18,040 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 137 transitions. Word has length 28 [2021-11-21 01:10:18,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:10:18,041 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 137 transitions. [2021-11-21 01:10:18,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 137 transitions. [2021-11-21 01:10:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 01:10:18,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:18,050 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-21 01:10:18,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:10:18,051 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1098351399, now seen corresponding path program 1 times [2021-11-21 01:10:18,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:10:18,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507881432] [2021-11-21 01:10:18,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:18,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:10:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:10:18,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:10:18,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507881432] [2021-11-21 01:10:18,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507881432] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:10:18,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:10:18,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:10:18,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605347568] [2021-11-21 01:10:18,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:10:18,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:10:18,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:10:18,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:10:18,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:10:18,188 INFO L87 Difference]: Start difference. First operand 97 states and 137 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:18,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:10:18,335 INFO L93 Difference]: Finished difference Result 208 states and 299 transitions. [2021-11-21 01:10:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:10:18,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-21 01:10:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:10:18,339 INFO L225 Difference]: With dead ends: 208 [2021-11-21 01:10:18,339 INFO L226 Difference]: Without dead ends: 114 [2021-11-21 01:10:18,342 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:10:18,350 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:10:18,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 141 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:10:18,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-21 01:10:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2021-11-21 01:10:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.3963963963963963) internal successors, (155), 111 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:18,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 155 transitions. [2021-11-21 01:10:18,372 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 155 transitions. Word has length 39 [2021-11-21 01:10:18,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:10:18,372 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 155 transitions. [2021-11-21 01:10:18,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 155 transitions. [2021-11-21 01:10:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:10:18,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:18,378 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:18,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:10:18,379 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:18,382 INFO L85 PathProgramCache]: Analyzing trace with hash -212303819, now seen corresponding path program 1 times [2021-11-21 01:10:18,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:10:18,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354294770] [2021-11-21 01:10:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:18,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:10:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:10:18,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:10:18,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354294770] [2021-11-21 01:10:18,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354294770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:10:18,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43512950] [2021-11-21 01:10:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:18,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:10:18,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:10:18,492 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:10:18,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:10:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:18,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:10:18,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:10:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 01:10:18,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:10:18,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43512950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:10:18,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:10:18,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-11-21 01:10:18,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621299248] [2021-11-21 01:10:18,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:10:18,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:10:18,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:10:18,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:10:18,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:10:18,887 INFO L87 Difference]: Start difference. First operand 112 states and 155 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:19,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:10:19,109 INFO L93 Difference]: Finished difference Result 264 states and 384 transitions. [2021-11-21 01:10:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:10:19,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-21 01:10:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:10:19,111 INFO L225 Difference]: With dead ends: 264 [2021-11-21 01:10:19,111 INFO L226 Difference]: Without dead ends: 155 [2021-11-21 01:10:19,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:10:19,113 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 33 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:10:19,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 162 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:10:19,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-21 01:10:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 149. [2021-11-21 01:10:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.3243243243243243) internal successors, (196), 148 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:19,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 196 transitions. [2021-11-21 01:10:19,124 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 196 transitions. Word has length 52 [2021-11-21 01:10:19,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:10:19,125 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 196 transitions. [2021-11-21 01:10:19,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:19,125 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 196 transitions. [2021-11-21 01:10:19,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 01:10:19,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:19,127 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:19,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:10:19,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:10:19,353 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:19,354 INFO L85 PathProgramCache]: Analyzing trace with hash 204490708, now seen corresponding path program 1 times [2021-11-21 01:10:19,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:10:19,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517485733] [2021-11-21 01:10:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:19,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:10:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:10:19,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:10:19,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517485733] [2021-11-21 01:10:19,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517485733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:10:19,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:10:19,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:10:19,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138067899] [2021-11-21 01:10:19,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:10:19,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:10:19,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:10:19,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:10:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:10:19,425 INFO L87 Difference]: Start difference. First operand 149 states and 196 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:10:19,531 INFO L93 Difference]: Finished difference Result 316 states and 425 transitions. [2021-11-21 01:10:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:10:19,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-21 01:10:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:10:19,538 INFO L225 Difference]: With dead ends: 316 [2021-11-21 01:10:19,538 INFO L226 Difference]: Without dead ends: 170 [2021-11-21 01:10:19,539 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:10:19,540 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:10:19,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 143 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:10:19,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-21 01:10:19,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2021-11-21 01:10:19,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.3053892215568863) internal successors, (218), 167 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:19,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 218 transitions. [2021-11-21 01:10:19,565 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 218 transitions. Word has length 68 [2021-11-21 01:10:19,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:10:19,566 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 218 transitions. [2021-11-21 01:10:19,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 218 transitions. [2021-11-21 01:10:19,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-21 01:10:19,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:19,568 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:19,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:10:19,568 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:19,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:19,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2115836599, now seen corresponding path program 1 times [2021-11-21 01:10:19,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:10:19,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489846881] [2021-11-21 01:10:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:19,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:10:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:10:19,751 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:10:19,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489846881] [2021-11-21 01:10:19,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489846881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:10:19,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491238619] [2021-11-21 01:10:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:19,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:10:19,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:10:19,753 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:10:19,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:10:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:19,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:10:19,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:10:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-21 01:10:20,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:10:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-21 01:10:20,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491238619] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:10:20,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:10:20,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 6 [2021-11-21 01:10:20,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637843680] [2021-11-21 01:10:20,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:10:20,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:10:20,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:10:20,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:10:20,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:10:20,346 INFO L87 Difference]: Start difference. First operand 168 states and 218 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:20,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:10:20,391 INFO L93 Difference]: Finished difference Result 332 states and 432 transitions. [2021-11-21 01:10:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:10:20,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-21 01:10:20,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:10:20,394 INFO L225 Difference]: With dead ends: 332 [2021-11-21 01:10:20,394 INFO L226 Difference]: Without dead ends: 330 [2021-11-21 01:10:20,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:10:20,395 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 76 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:10:20,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 201 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:10:20,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-21 01:10:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2021-11-21 01:10:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.3069908814589666) internal successors, (430), 329 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 430 transitions. [2021-11-21 01:10:20,409 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 430 transitions. Word has length 86 [2021-11-21 01:10:20,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:10:20,409 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 430 transitions. [2021-11-21 01:10:20,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:10:20,409 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 430 transitions. [2021-11-21 01:10:20,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 01:10:20,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:10:20,419 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:10:20,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 01:10:20,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:10:20,633 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:10:20,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:10:20,633 INFO L85 PathProgramCache]: Analyzing trace with hash -897175903, now seen corresponding path program 1 times [2021-11-21 01:10:20,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:10:20,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652890919] [2021-11-21 01:10:20,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:20,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:10:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:10:20,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:10:20,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652890919] [2021-11-21 01:10:20,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652890919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:10:20,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409595784] [2021-11-21 01:10:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:10:20,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:10:20,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:10:20,749 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:10:20,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:10:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:10:20,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:10:20,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:10:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:10:21,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:10:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-21 01:10:21,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409595784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:10:21,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [456538230] [2021-11-21 01:10:21,500 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2021-11-21 01:10:21,501 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:10:21,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:10:21,511 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:10:21,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:14:29,415 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:14:45,260 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:14:45,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:14:45,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 3] total 8 [2021-11-21 01:14:45,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215064332] [2021-11-21 01:14:45,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:14:45,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:14:45,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:45,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:14:45,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 01:14:45,262 INFO L87 Difference]: Start difference. First operand 330 states and 430 transitions. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:45,465 INFO L93 Difference]: Finished difference Result 715 states and 926 transitions. [2021-11-21 01:14:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:14:45,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-21 01:14:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:45,472 INFO L225 Difference]: With dead ends: 715 [2021-11-21 01:14:45,472 INFO L226 Difference]: Without dead ends: 713 [2021-11-21 01:14:45,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 01:14:45,476 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 602 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:45,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 1279 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:14:45,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-11-21 01:14:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 492. [2021-11-21 01:14:45,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.3075356415478616) internal successors, (642), 491 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 642 transitions. [2021-11-21 01:14:45,500 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 642 transitions. Word has length 87 [2021-11-21 01:14:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:45,502 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 642 transitions. [2021-11-21 01:14:45,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 642 transitions. [2021-11-21 01:14:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 01:14:45,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:45,506 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 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] [2021-11-21 01:14:45,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:45,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:14:45,733 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:45,734 INFO L85 PathProgramCache]: Analyzing trace with hash 2134214837, now seen corresponding path program 2 times [2021-11-21 01:14:45,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:45,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274709683] [2021-11-21 01:14:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:45,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-21 01:14:45,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:45,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274709683] [2021-11-21 01:14:45,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274709683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:45,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:45,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:14:45,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920668234] [2021-11-21 01:14:45,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:45,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:14:45,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:45,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:14:45,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:14:45,818 INFO L87 Difference]: Start difference. First operand 492 states and 642 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:45,983 INFO L93 Difference]: Finished difference Result 1119 states and 1524 transitions. [2021-11-21 01:14:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:14:45,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-21 01:14:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:45,990 INFO L225 Difference]: With dead ends: 1119 [2021-11-21 01:14:45,990 INFO L226 Difference]: Without dead ends: 627 [2021-11-21 01:14:45,991 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:14:45,992 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 67 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:45,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 116 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:14:45,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-11-21 01:14:46,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 606. [2021-11-21 01:14:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 1.3636363636363635) internal successors, (825), 605 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 825 transitions. [2021-11-21 01:14:46,018 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 825 transitions. Word has length 122 [2021-11-21 01:14:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:46,018 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 825 transitions. [2021-11-21 01:14:46,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 825 transitions. [2021-11-21 01:14:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-21 01:14:46,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:46,022 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 4, 4, 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] [2021-11-21 01:14:46,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:14:46,022 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:46,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1951013804, now seen corresponding path program 1 times [2021-11-21 01:14:46,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:46,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566480287] [2021-11-21 01:14:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:46,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-21 01:14:46,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:46,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566480287] [2021-11-21 01:14:46,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566480287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:46,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:46,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:14:46,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187539453] [2021-11-21 01:14:46,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:46,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:14:46,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:46,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:14:46,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:14:46,103 INFO L87 Difference]: Start difference. First operand 606 states and 825 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:46,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:46,223 INFO L93 Difference]: Finished difference Result 1104 states and 1493 transitions. [2021-11-21 01:14:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:14:46,223 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-21 01:14:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:46,227 INFO L225 Difference]: With dead ends: 1104 [2021-11-21 01:14:46,227 INFO L226 Difference]: Without dead ends: 501 [2021-11-21 01:14:46,228 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:14:46,231 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 11 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:46,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:14:46,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-21 01:14:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 495. [2021-11-21 01:14:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.3218623481781377) internal successors, (653), 494 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:46,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 653 transitions. [2021-11-21 01:14:46,250 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 653 transitions. Word has length 155 [2021-11-21 01:14:46,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:46,251 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 653 transitions. [2021-11-21 01:14:46,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:46,251 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 653 transitions. [2021-11-21 01:14:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-21 01:14:46,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:46,255 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 5, 5, 3, 3, 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] [2021-11-21 01:14:46,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:14:46,255 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:46,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:46,256 INFO L85 PathProgramCache]: Analyzing trace with hash -320390595, now seen corresponding path program 1 times [2021-11-21 01:14:46,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:46,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909969811] [2021-11-21 01:14:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:46,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-21 01:14:46,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:46,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909969811] [2021-11-21 01:14:46,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909969811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:46,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:46,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:14:46,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589671963] [2021-11-21 01:14:46,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:46,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:14:46,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:46,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:14:46,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:14:46,320 INFO L87 Difference]: Start difference. First operand 495 states and 653 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:46,434 INFO L93 Difference]: Finished difference Result 1037 states and 1371 transitions. [2021-11-21 01:14:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:14:46,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-11-21 01:14:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:46,438 INFO L225 Difference]: With dead ends: 1037 [2021-11-21 01:14:46,439 INFO L226 Difference]: Without dead ends: 545 [2021-11-21 01:14:46,439 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:14:46,440 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:46,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 144 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:14:46,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-21 01:14:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 541. [2021-11-21 01:14:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.3055555555555556) internal successors, (705), 540 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 705 transitions. [2021-11-21 01:14:46,459 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 705 transitions. Word has length 175 [2021-11-21 01:14:46,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:46,459 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 705 transitions. [2021-11-21 01:14:46,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 705 transitions. [2021-11-21 01:14:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-21 01:14:46,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:46,463 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 6, 6, 4, 4, 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] [2021-11-21 01:14:46,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:14:46,464 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:46,465 INFO L85 PathProgramCache]: Analyzing trace with hash 104944256, now seen corresponding path program 1 times [2021-11-21 01:14:46,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:46,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936571066] [2021-11-21 01:14:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:46,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 415 proven. 65 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-21 01:14:46,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:46,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936571066] [2021-11-21 01:14:46,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936571066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:14:46,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31029307] [2021-11-21 01:14:46,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:46,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:14:46,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:46,577 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:14:46,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:14:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:46,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:14:46,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-11-21 01:14:47,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:14:47,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31029307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:47,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:14:47,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-21 01:14:47,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805577880] [2021-11-21 01:14:47,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:47,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:14:47,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:14:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:47,069 INFO L87 Difference]: Start difference. First operand 541 states and 705 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:47,222 INFO L93 Difference]: Finished difference Result 1195 states and 1575 transitions. [2021-11-21 01:14:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:14:47,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-21 01:14:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:47,227 INFO L225 Difference]: With dead ends: 1195 [2021-11-21 01:14:47,227 INFO L226 Difference]: Without dead ends: 657 [2021-11-21 01:14:47,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:47,229 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 39 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:47,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 161 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:14:47,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-11-21 01:14:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 649. [2021-11-21 01:14:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.2762345679012346) internal successors, (827), 648 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:47,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 827 transitions. [2021-11-21 01:14:47,249 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 827 transitions. Word has length 196 [2021-11-21 01:14:47,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:47,250 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 827 transitions. [2021-11-21 01:14:47,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:47,250 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 827 transitions. [2021-11-21 01:14:47,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-21 01:14:47,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:47,254 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 7, 7, 5, 5, 3, 3, 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] [2021-11-21 01:14:47,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-21 01:14:47,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:14:47,469 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:47,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2089624731, now seen corresponding path program 1 times [2021-11-21 01:14:47,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:47,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350854957] [2021-11-21 01:14:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:47,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 482 proven. 78 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-11-21 01:14:47,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:47,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350854957] [2021-11-21 01:14:47,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350854957] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:14:47,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108291984] [2021-11-21 01:14:47,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:47,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:14:47,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:47,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:14:47,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:14:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:47,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:14:47,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 448 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-11-21 01:14:48,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:14:48,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108291984] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:48,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:14:48,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-21 01:14:48,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927655068] [2021-11-21 01:14:48,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:48,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:14:48,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:48,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:14:48,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:48,093 INFO L87 Difference]: Start difference. First operand 649 states and 827 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:48,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:48,279 INFO L93 Difference]: Finished difference Result 1431 states and 1859 transitions. [2021-11-21 01:14:48,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:14:48,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2021-11-21 01:14:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:48,287 INFO L225 Difference]: With dead ends: 1431 [2021-11-21 01:14:48,287 INFO L226 Difference]: Without dead ends: 785 [2021-11-21 01:14:48,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:14:48,289 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 43 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:48,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 161 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:14:48,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-11-21 01:14:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 777. [2021-11-21 01:14:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.2487113402061856) internal successors, (969), 776 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 969 transitions. [2021-11-21 01:14:48,315 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 969 transitions. Word has length 223 [2021-11-21 01:14:48,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:48,316 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 969 transitions. [2021-11-21 01:14:48,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 969 transitions. [2021-11-21 01:14:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-21 01:14:48,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:48,321 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:48,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:48,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:14:48,541 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:48,541 INFO L85 PathProgramCache]: Analyzing trace with hash 462227647, now seen corresponding path program 1 times [2021-11-21 01:14:48,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:48,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693455136] [2021-11-21 01:14:48,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:48,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 549 proven. 91 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-21 01:14:48,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:48,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693455136] [2021-11-21 01:14:48,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693455136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:14:48,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783848616] [2021-11-21 01:14:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:48,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:14:48,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:48,668 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:14:48,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:14:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:48,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:14:48,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 471 proven. 169 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-21 01:14:49,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-11-21 01:14:49,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783848616] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:14:49,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:14:49,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 8 [2021-11-21 01:14:49,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739164494] [2021-11-21 01:14:49,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:49,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:14:49,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:49,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:14:49,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:14:49,830 INFO L87 Difference]: Start difference. First operand 777 states and 969 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:49,959 INFO L93 Difference]: Finished difference Result 1594 states and 2006 transitions. [2021-11-21 01:14:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:14:49,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 256 [2021-11-21 01:14:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:49,965 INFO L225 Difference]: With dead ends: 1594 [2021-11-21 01:14:49,965 INFO L226 Difference]: Without dead ends: 820 [2021-11-21 01:14:49,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:14:49,967 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 88 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:49,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 60 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:14:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-11-21 01:14:49,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 811. [2021-11-21 01:14:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 1.2679012345679013) internal successors, (1027), 810 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:49,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1027 transitions. [2021-11-21 01:14:49,994 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1027 transitions. Word has length 256 [2021-11-21 01:14:49,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:49,995 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1027 transitions. [2021-11-21 01:14:49,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1027 transitions. [2021-11-21 01:14:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-21 01:14:50,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:50,000 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 01:14:50,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:50,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 01:14:50,221 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash -322572897, now seen corresponding path program 1 times [2021-11-21 01:14:50,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:50,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735483470] [2021-11-21 01:14:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:50,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 562 proven. 0 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2021-11-21 01:14:50,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:50,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735483470] [2021-11-21 01:14:50,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735483470] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:50,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:14:50,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:14:50,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610587883] [2021-11-21 01:14:50,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:50,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:14:50,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:50,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:14:50,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:14:50,298 INFO L87 Difference]: Start difference. First operand 811 states and 1027 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:50,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:50,463 INFO L93 Difference]: Finished difference Result 1681 states and 2157 transitions. [2021-11-21 01:14:50,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:14:50,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 256 [2021-11-21 01:14:50,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:50,469 INFO L225 Difference]: With dead ends: 1681 [2021-11-21 01:14:50,469 INFO L226 Difference]: Without dead ends: 867 [2021-11-21 01:14:50,470 INFO L932 BasicCegarLoop]: 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 [2021-11-21 01:14:50,472 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 90 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:50,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 85 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:14:50,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-11-21 01:14:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 847. [2021-11-21 01:14:50,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.2777777777777777) internal successors, (1081), 846 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1081 transitions. [2021-11-21 01:14:50,500 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1081 transitions. Word has length 256 [2021-11-21 01:14:50,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:50,501 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1081 transitions. [2021-11-21 01:14:50,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:50,501 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1081 transitions. [2021-11-21 01:14:50,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-21 01:14:50,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:50,524 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:14:50,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:14:50,524 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:50,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash 422727252, now seen corresponding path program 1 times [2021-11-21 01:14:50,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:50,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075513126] [2021-11-21 01:14:50,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:50,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 551 proven. 97 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-21 01:14:50,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:50,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075513126] [2021-11-21 01:14:50,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075513126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:14:50,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530608628] [2021-11-21 01:14:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:50,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:14:50,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:50,629 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:14:50,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:14:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:50,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:14:50,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 473 proven. 175 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-21 01:14:51,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-11-21 01:14:51,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530608628] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 01:14:51,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:14:51,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 8 [2021-11-21 01:14:51,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362279017] [2021-11-21 01:14:51,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:51,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:14:51,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:51,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:14:51,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:14:51,653 INFO L87 Difference]: Start difference. First operand 847 states and 1081 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:51,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:51,769 INFO L93 Difference]: Finished difference Result 1700 states and 2170 transitions. [2021-11-21 01:14:51,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:14:51,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 257 [2021-11-21 01:14:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:51,775 INFO L225 Difference]: With dead ends: 1700 [2021-11-21 01:14:51,775 INFO L226 Difference]: Without dead ends: 856 [2021-11-21 01:14:51,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:14:51,782 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:51,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 55 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:14:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-11-21 01:14:51,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 847. [2021-11-21 01:14:51,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.2754137115839244) internal successors, (1079), 846 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1079 transitions. [2021-11-21 01:14:51,811 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1079 transitions. Word has length 257 [2021-11-21 01:14:51,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:51,811 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1079 transitions. [2021-11-21 01:14:51,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:51,812 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1079 transitions. [2021-11-21 01:14:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-21 01:14:51,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:51,817 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 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] [2021-11-21 01:14:51,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:52,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 01:14:52,033 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:52,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1853317551, now seen corresponding path program 2 times [2021-11-21 01:14:52,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:52,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512132139] [2021-11-21 01:14:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:52,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 671 proven. 77 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-11-21 01:14:52,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:52,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512132139] [2021-11-21 01:14:52,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512132139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:14:52,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245693820] [2021-11-21 01:14:52,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:14:52,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:14:52,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:52,153 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:14:52,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:14:52,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-21 01:14:52,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:14:52,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:14:52,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 516 proven. 0 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2021-11-21 01:14:52,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:14:52,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245693820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:14:52,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:14:52,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-21 01:14:52,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468957588] [2021-11-21 01:14:52,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:14:52,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:14:52,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:14:52,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:14:52,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:14:52,677 INFO L87 Difference]: Start difference. First operand 847 states and 1079 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:52,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:14:52,839 INFO L93 Difference]: Finished difference Result 1769 states and 2285 transitions. [2021-11-21 01:14:52,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:14:52,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-11-21 01:14:52,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:14:52,846 INFO L225 Difference]: With dead ends: 1769 [2021-11-21 01:14:52,846 INFO L226 Difference]: Without dead ends: 925 [2021-11-21 01:14:52,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:14:52,848 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 33 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:14:52,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 141 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:14:52,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-11-21 01:14:52,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 917. [2021-11-21 01:14:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 1.2609170305676856) internal successors, (1155), 916 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1155 transitions. [2021-11-21 01:14:52,881 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1155 transitions. Word has length 269 [2021-11-21 01:14:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:14:52,881 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 1155 transitions. [2021-11-21 01:14:52,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:14:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1155 transitions. [2021-11-21 01:14:52,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-11-21 01:14:52,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:14:52,888 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 9, 9, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-21 01:14:52,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:14:53,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:14:53,101 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:14:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:14:53,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1567671545, now seen corresponding path program 1 times [2021-11-21 01:14:53,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:14:53,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432919201] [2021-11-21 01:14:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:53,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:14:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 616 proven. 240 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-21 01:14:53,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:14:53,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432919201] [2021-11-21 01:14:53,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432919201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:14:53,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037534042] [2021-11-21 01:14:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:14:53,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:14:53,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:14:53,222 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:14:53,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f487529b-061a-47f6-901b-978ebe0f8ad8/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:14:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:14:53,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:14:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:14:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 611 proven. 13 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-11-21 01:14:53,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:14:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 611 proven. 13 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-11-21 01:14:54,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037534042] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:14:54,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1677972086] [2021-11-21 01:14:54,464 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2021-11-21 01:14:54,464 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:14:54,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:14:54,465 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:14:54,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs