./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:05:31,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:05:31,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:05:31,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:05:31,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:05:31,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:05:31,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:05:31,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:05:31,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:05:31,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:05:31,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:05:31,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:05:31,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:05:31,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:05:31,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:05:31,266 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:05:31,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:05:31,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:05:31,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:05:31,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:05:31,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:05:31,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:05:31,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:05:31,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:05:31,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:05:31,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:05:31,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:05:31,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:05:31,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:05:31,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:05:31,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:05:31,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:05:31,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:05:31,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:05:31,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:05:31,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:05:31,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:05:31,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:05:31,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:05:31,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:05:31,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:05:31,295 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:05:31,324 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:05:31,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:05:31,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:05:31,325 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:05:31,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:05:31,326 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:05:31,327 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:05:31,327 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:05:31,327 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:05:31,328 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:05:31,328 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:05:31,328 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:05:31,328 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:05:31,329 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:05:31,329 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:05:31,329 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:05:31,330 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:05:31,330 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:05:31,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:05:31,331 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:05:31,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:05:31,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:05:31,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:05:31,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:05:31,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:05:31,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:05:31,333 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:05:31,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:05:31,334 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:05:31,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:05:31,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:05:31,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:05:31,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:05:31,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:05:31,335 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:05:31,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:05:31,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:05:31,336 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:05:31,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:05:31,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:05:31,337 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:05:31,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 [2022-11-26 00:05:31,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:05:31,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:05:31,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:05:31,726 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:05:31,729 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:05:31,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2022-11-26 00:05:35,504 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:05:35,938 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:05:35,939 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2022-11-26 00:05:35,987 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/data/1b0b21c4e/86d4ce1188d74907897de9d1f03d7cdb/FLAGd39407716 [2022-11-26 00:05:36,008 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/data/1b0b21c4e/86d4ce1188d74907897de9d1f03d7cdb [2022-11-26 00:05:36,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:05:36,017 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:05:36,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:05:36,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:05:36,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:05:36,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:36" (1/1) ... [2022-11-26 00:05:36,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49715009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:36, skipping insertion in model container [2022-11-26 00:05:36,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:36" (1/1) ... [2022-11-26 00:05:36,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:05:36,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:05:36,478 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2022-11-26 00:05:36,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:05:36,862 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:05:36,887 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2022-11-26 00:05:37,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:05:37,142 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:05:37,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:37 WrapperNode [2022-11-26 00:05:37,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:05:37,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:05:37,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:05:37,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:05:37,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:37" (1/1) ... [2022-11-26 00:05:37,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:37" (1/1) ... [2022-11-26 00:05:37,274 INFO L138 Inliner]: procedures = 97, calls = 346, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 925 [2022-11-26 00:05:37,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:05:37,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:05:37,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:05:37,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:05:37,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:37" (1/1) ... [2022-11-26 00:05:37,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:37" (1/1) ... [2022-11-26 00:05:37,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:37" (1/1) ... [2022-11-26 00:05:37,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:37" (1/1) ... [2022-11-26 00:05:37,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:37" (1/1) ... [2022-11-26 00:05:37,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:37" (1/1) ... [2022-11-26 00:05:37,347 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:37" (1/1) ... [2022-11-26 00:05:37,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:37" (1/1) ... [2022-11-26 00:05:37,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:05:37,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:05:37,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:05:37,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:05:37,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:37" (1/1) ... [2022-11-26 00:05:37,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:05:37,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:37,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:05:37,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:05:37,539 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-26 00:05:37,540 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-26 00:05:37,540 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 00:05:37,540 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 00:05:37,541 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 00:05:37,542 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 00:05:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-26 00:05:37,542 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-26 00:05:37,542 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 00:05:37,543 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 00:05:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 00:05:37,543 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 00:05:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 00:05:37,544 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 00:05:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-26 00:05:37,544 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-26 00:05:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-26 00:05:37,545 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-26 00:05:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 00:05:37,545 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 00:05:37,545 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 00:05:37,545 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 00:05:37,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:05:37,547 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-26 00:05:37,547 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-26 00:05:37,548 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-26 00:05:37,549 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-26 00:05:37,549 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-26 00:05:37,549 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-26 00:05:37,549 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 00:05:37,551 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 00:05:37,552 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 00:05:37,552 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 00:05:37,552 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-26 00:05:37,553 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-26 00:05:37,553 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 00:05:37,553 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 00:05:37,553 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 00:05:37,554 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 00:05:37,554 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 00:05:37,554 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 00:05:37,554 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 00:05:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 00:05:37,555 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 00:05:37,555 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 00:05:37,556 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 00:05:37,557 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 00:05:37,557 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-26 00:05:37,558 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-26 00:05:37,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:05:37,559 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 00:05:37,559 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 00:05:37,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:05:37,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:05:37,560 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 00:05:37,561 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 00:05:37,803 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:05:37,807 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:05:39,748 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:05:40,831 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:05:40,832 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:05:40,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:40 BoogieIcfgContainer [2022-11-26 00:05:40,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:05:40,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:05:40,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:05:40,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:05:40,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:05:36" (1/3) ... [2022-11-26 00:05:40,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f8132b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:40, skipping insertion in model container [2022-11-26 00:05:40,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:37" (2/3) ... [2022-11-26 00:05:40,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f8132b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:40, skipping insertion in model container [2022-11-26 00:05:40,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:40" (3/3) ... [2022-11-26 00:05:40,848 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product31.cil.c [2022-11-26 00:05:40,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:05:40,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:05:40,949 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:05:40,959 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@70e0adc5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:05:40,959 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:05:40,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 388 states, 261 states have (on average 1.5747126436781609) internal successors, (411), 282 states have internal predecessors, (411), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-26 00:05:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 00:05:40,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:40,995 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:40,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:41,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:41,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1560275502, now seen corresponding path program 1 times [2022-11-26 00:05:41,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:41,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128279678] [2022-11-26 00:05:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:41,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:41,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:05:41,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:41,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128279678] [2022-11-26 00:05:41,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128279678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:41,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:41,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:05:41,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170912341] [2022-11-26 00:05:41,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:41,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:05:41,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:05:41,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:05:41,742 INFO L87 Difference]: Start difference. First operand has 388 states, 261 states have (on average 1.5747126436781609) internal successors, (411), 282 states have internal predecessors, (411), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-26 00:05:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:42,036 INFO L93 Difference]: Finished difference Result 406 states and 636 transitions. [2022-11-26 00:05:42,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:05:42,043 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 77 [2022-11-26 00:05:42,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:42,079 INFO L225 Difference]: With dead ends: 406 [2022-11-26 00:05:42,080 INFO L226 Difference]: Without dead ends: 384 [2022-11-26 00:05:42,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:05:42,088 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:42,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 562 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:42,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-26 00:05:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2022-11-26 00:05:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 259 states have (on average 1.5637065637065637) internal successors, (405), 278 states have internal predecessors, (405), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-26 00:05:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 598 transitions. [2022-11-26 00:05:42,224 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 598 transitions. Word has length 77 [2022-11-26 00:05:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:42,227 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 598 transitions. [2022-11-26 00:05:42,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-26 00:05:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 598 transitions. [2022-11-26 00:05:42,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-26 00:05:42,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:42,235 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:42,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:05:42,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:42,237 INFO L85 PathProgramCache]: Analyzing trace with hash -538972801, now seen corresponding path program 1 times [2022-11-26 00:05:42,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:42,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138355330] [2022-11-26 00:05:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:42,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:05:42,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:42,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138355330] [2022-11-26 00:05:42,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138355330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:42,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:42,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-26 00:05:42,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549099622] [2022-11-26 00:05:42,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:42,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:05:42,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:42,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:05:42,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:05:42,933 INFO L87 Difference]: Start difference. First operand 384 states and 598 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-26 00:05:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:46,320 INFO L93 Difference]: Finished difference Result 1161 states and 1835 transitions. [2022-11-26 00:05:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:05:46,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 78 [2022-11-26 00:05:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:46,329 INFO L225 Difference]: With dead ends: 1161 [2022-11-26 00:05:46,329 INFO L226 Difference]: Without dead ends: 793 [2022-11-26 00:05:46,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:05:46,335 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 1173 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1248 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 3038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:46,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1248 Valid, 1370 Invalid, 3038 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [436 Valid, 2602 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-26 00:05:46,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-26 00:05:46,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 755. [2022-11-26 00:05:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 518 states have (on average 1.5752895752895753) internal successors, (816), 551 states have internal predecessors, (816), 188 states have call successors, (188), 48 states have call predecessors, (188), 48 states have return successors, (189), 180 states have call predecessors, (189), 183 states have call successors, (189) [2022-11-26 00:05:46,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1193 transitions. [2022-11-26 00:05:46,432 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1193 transitions. Word has length 78 [2022-11-26 00:05:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:46,435 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1193 transitions. [2022-11-26 00:05:46,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-26 00:05:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1193 transitions. [2022-11-26 00:05:46,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-26 00:05:46,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:46,446 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:46,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:05:46,446 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash -173815726, now seen corresponding path program 1 times [2022-11-26 00:05:46,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:46,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625851805] [2022-11-26 00:05:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:46,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:05:46,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:46,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625851805] [2022-11-26 00:05:46,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625851805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:46,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:46,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:05:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329979332] [2022-11-26 00:05:46,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:46,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:05:46,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:46,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:05:46,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:46,823 INFO L87 Difference]: Start difference. First operand 755 states and 1193 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-26 00:05:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:47,755 INFO L93 Difference]: Finished difference Result 826 states and 1305 transitions. [2022-11-26 00:05:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:05:47,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2022-11-26 00:05:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:47,764 INFO L225 Difference]: With dead ends: 826 [2022-11-26 00:05:47,765 INFO L226 Difference]: Without dead ends: 811 [2022-11-26 00:05:47,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:05:47,768 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 662 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:47,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1840 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:05:47,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-11-26 00:05:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 759. [2022-11-26 00:05:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 522 states have (on average 1.5708812260536398) internal successors, (820), 555 states have internal predecessors, (820), 188 states have call successors, (188), 48 states have call predecessors, (188), 48 states have return successors, (189), 180 states have call predecessors, (189), 183 states have call successors, (189) [2022-11-26 00:05:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1197 transitions. [2022-11-26 00:05:47,852 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1197 transitions. Word has length 82 [2022-11-26 00:05:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:47,852 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 1197 transitions. [2022-11-26 00:05:47,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-26 00:05:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1197 transitions. [2022-11-26 00:05:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 00:05:47,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:47,857 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:47,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:05:47,857 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:47,858 INFO L85 PathProgramCache]: Analyzing trace with hash 887501073, now seen corresponding path program 1 times [2022-11-26 00:05:47,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:47,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862553940] [2022-11-26 00:05:47,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:47,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:05:48,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:48,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862553940] [2022-11-26 00:05:48,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862553940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:48,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:48,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:05:48,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445658149] [2022-11-26 00:05:48,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:48,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:05:48,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:48,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:05:48,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:05:48,119 INFO L87 Difference]: Start difference. First operand 759 states and 1197 transitions. Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-26 00:05:48,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:48,385 INFO L93 Difference]: Finished difference Result 778 states and 1221 transitions. [2022-11-26 00:05:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:05:48,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 87 [2022-11-26 00:05:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:48,399 INFO L225 Difference]: With dead ends: 778 [2022-11-26 00:05:48,399 INFO L226 Difference]: Without dead ends: 763 [2022-11-26 00:05:48,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:48,402 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 30 mSDsluCounter, 1645 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:48,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2206 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-11-26 00:05:48,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 759. [2022-11-26 00:05:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 522 states have (on average 1.5670498084291187) internal successors, (818), 555 states have internal predecessors, (818), 188 states have call successors, (188), 48 states have call predecessors, (188), 48 states have return successors, (189), 180 states have call predecessors, (189), 183 states have call successors, (189) [2022-11-26 00:05:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1195 transitions. [2022-11-26 00:05:48,471 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1195 transitions. Word has length 87 [2022-11-26 00:05:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:48,472 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 1195 transitions. [2022-11-26 00:05:48,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-26 00:05:48,473 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1195 transitions. [2022-11-26 00:05:48,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-26 00:05:48,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:48,477 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:48,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:05:48,478 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:48,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:48,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1698869369, now seen corresponding path program 1 times [2022-11-26 00:05:48,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:48,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086103862] [2022-11-26 00:05:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:48,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:05:48,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:48,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086103862] [2022-11-26 00:05:48,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086103862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:48,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:48,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:05:48,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974708164] [2022-11-26 00:05:48,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:48,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:48,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:48,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:48,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:48,661 INFO L87 Difference]: Start difference. First operand 759 states and 1195 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:05:48,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:48,945 INFO L93 Difference]: Finished difference Result 2211 states and 3515 transitions. [2022-11-26 00:05:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:48,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2022-11-26 00:05:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:48,962 INFO L225 Difference]: With dead ends: 2211 [2022-11-26 00:05:48,962 INFO L226 Difference]: Without dead ends: 1468 [2022-11-26 00:05:48,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:48,980 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 553 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:48,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1218 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2022-11-26 00:05:49,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1440. [2022-11-26 00:05:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1010 states have (on average 1.5792079207920793) internal successors, (1595), 1072 states have internal predecessors, (1595), 340 states have call successors, (340), 87 states have call predecessors, (340), 89 states have return successors, (354), 318 states have call predecessors, (354), 335 states have call successors, (354) [2022-11-26 00:05:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2289 transitions. [2022-11-26 00:05:49,205 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2289 transitions. Word has length 94 [2022-11-26 00:05:49,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:49,206 INFO L495 AbstractCegarLoop]: Abstraction has 1440 states and 2289 transitions. [2022-11-26 00:05:49,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:05:49,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2289 transitions. [2022-11-26 00:05:49,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-26 00:05:49,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:49,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:49,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:05:49,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:49,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1125484940, now seen corresponding path program 1 times [2022-11-26 00:05:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:49,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077001158] [2022-11-26 00:05:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:49,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:05:49,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:49,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077001158] [2022-11-26 00:05:49,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077001158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:49,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:49,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:05:49,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470190849] [2022-11-26 00:05:49,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:49,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:49,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:49,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:49,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:49,380 INFO L87 Difference]: Start difference. First operand 1440 states and 2289 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:05:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:49,768 INFO L93 Difference]: Finished difference Result 4253 states and 6820 transitions. [2022-11-26 00:05:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:49,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2022-11-26 00:05:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:49,826 INFO L225 Difference]: With dead ends: 4253 [2022-11-26 00:05:49,828 INFO L226 Difference]: Without dead ends: 2832 [2022-11-26 00:05:49,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:49,844 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 552 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:49,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 1224 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:49,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2022-11-26 00:05:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2803. [2022-11-26 00:05:50,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 1987 states have (on average 1.584297936587821) internal successors, (3148), 2107 states have internal predecessors, (3148), 644 states have call successors, (644), 165 states have call predecessors, (644), 171 states have return successors, (700), 594 states have call predecessors, (700), 639 states have call successors, (700) [2022-11-26 00:05:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 4492 transitions. [2022-11-26 00:05:50,105 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 4492 transitions. Word has length 95 [2022-11-26 00:05:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:50,107 INFO L495 AbstractCegarLoop]: Abstraction has 2803 states and 4492 transitions. [2022-11-26 00:05:50,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:05:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 4492 transitions. [2022-11-26 00:05:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-26 00:05:50,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:50,112 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:50,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:05:50,112 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:50,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:50,113 INFO L85 PathProgramCache]: Analyzing trace with hash -530432919, now seen corresponding path program 1 times [2022-11-26 00:05:50,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:50,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218272210] [2022-11-26 00:05:50,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:50,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:05:50,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:50,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218272210] [2022-11-26 00:05:50,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218272210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:50,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:50,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:05:50,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071065264] [2022-11-26 00:05:50,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:50,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:50,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:50,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:50,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:50,287 INFO L87 Difference]: Start difference. First operand 2803 states and 4492 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:05:50,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:50,849 INFO L93 Difference]: Finished difference Result 8338 states and 13508 transitions. [2022-11-26 00:05:50,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:50,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 96 [2022-11-26 00:05:50,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:50,902 INFO L225 Difference]: With dead ends: 8338 [2022-11-26 00:05:50,903 INFO L226 Difference]: Without dead ends: 5560 [2022-11-26 00:05:50,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:50,924 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 551 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:50,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1230 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:50,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2022-11-26 00:05:51,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 5530. [2022-11-26 00:05:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5530 states, 3942 states have (on average 1.5854895991882294) internal successors, (6250), 4178 states have internal predecessors, (6250), 1252 states have call successors, (1252), 321 states have call predecessors, (1252), 335 states have return successors, (1452), 1146 states have call predecessors, (1452), 1247 states have call successors, (1452) [2022-11-26 00:05:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5530 states to 5530 states and 8954 transitions. [2022-11-26 00:05:51,549 INFO L78 Accepts]: Start accepts. Automaton has 5530 states and 8954 transitions. Word has length 96 [2022-11-26 00:05:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:51,550 INFO L495 AbstractCegarLoop]: Abstraction has 5530 states and 8954 transitions. [2022-11-26 00:05:51,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:05:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 5530 states and 8954 transitions. [2022-11-26 00:05:51,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-26 00:05:51,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:51,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:51,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:05:51,557 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:51,558 INFO L85 PathProgramCache]: Analyzing trace with hash 736314454, now seen corresponding path program 1 times [2022-11-26 00:05:51,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:51,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553114592] [2022-11-26 00:05:51,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:51,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:05:51,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:51,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553114592] [2022-11-26 00:05:51,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553114592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:51,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:51,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:05:51,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480652194] [2022-11-26 00:05:51,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:51,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:51,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:51,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:51,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:51,804 INFO L87 Difference]: Start difference. First operand 5530 states and 8954 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:05:52,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:52,809 INFO L93 Difference]: Finished difference Result 16509 states and 27181 transitions. [2022-11-26 00:05:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:52,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2022-11-26 00:05:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:52,928 INFO L225 Difference]: With dead ends: 16509 [2022-11-26 00:05:52,928 INFO L226 Difference]: Without dead ends: 11016 [2022-11-26 00:05:52,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:52,971 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 550 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:52,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1236 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11016 states. [2022-11-26 00:05:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11016 to 10985. [2022-11-26 00:05:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10985 states, 7853 states have (on average 1.5846173436903095) internal successors, (12444), 8321 states have internal predecessors, (12444), 2468 states have call successors, (2468), 633 states have call predecessors, (2468), 663 states have return successors, (3184), 2250 states have call predecessors, (3184), 2463 states have call successors, (3184) [2022-11-26 00:05:54,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10985 states to 10985 states and 18096 transitions. [2022-11-26 00:05:54,164 INFO L78 Accepts]: Start accepts. Automaton has 10985 states and 18096 transitions. Word has length 97 [2022-11-26 00:05:54,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:54,165 INFO L495 AbstractCegarLoop]: Abstraction has 10985 states and 18096 transitions. [2022-11-26 00:05:54,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:05:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 10985 states and 18096 transitions. [2022-11-26 00:05:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-26 00:05:54,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:54,170 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:54,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:05:54,170 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1350781259, now seen corresponding path program 1 times [2022-11-26 00:05:54,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:54,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547071431] [2022-11-26 00:05:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:54,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:05:54,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:54,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547071431] [2022-11-26 00:05:54,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547071431] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:54,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:54,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:05:54,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361414019] [2022-11-26 00:05:54,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:54,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:54,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:54,317 INFO L87 Difference]: Start difference. First operand 10985 states and 18096 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:05:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:55,612 INFO L93 Difference]: Finished difference Result 11699 states and 19315 transitions. [2022-11-26 00:05:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:55,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 98 [2022-11-26 00:05:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:55,716 INFO L225 Difference]: With dead ends: 11699 [2022-11-26 00:05:55,716 INFO L226 Difference]: Without dead ends: 11688 [2022-11-26 00:05:55,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:55,727 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 536 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:55,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 1234 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11688 states. [2022-11-26 00:05:56,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11688 to 11658. [2022-11-26 00:05:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11658 states, 8334 states have (on average 1.583993280537557) internal successors, (13201), 8831 states have internal predecessors, (13201), 2620 states have call successors, (2620), 672 states have call predecessors, (2620), 703 states have return successors, (3438), 2387 states have call predecessors, (3438), 2615 states have call successors, (3438) [2022-11-26 00:05:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11658 states to 11658 states and 19259 transitions. [2022-11-26 00:05:56,844 INFO L78 Accepts]: Start accepts. Automaton has 11658 states and 19259 transitions. Word has length 98 [2022-11-26 00:05:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:56,845 INFO L495 AbstractCegarLoop]: Abstraction has 11658 states and 19259 transitions. [2022-11-26 00:05:56,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-26 00:05:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 11658 states and 19259 transitions. [2022-11-26 00:05:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-26 00:05:56,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:56,855 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:56,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:05:56,855 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:56,856 INFO L85 PathProgramCache]: Analyzing trace with hash 882062043, now seen corresponding path program 1 times [2022-11-26 00:05:56,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:56,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053658533] [2022-11-26 00:05:56,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:56,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-26 00:05:57,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:57,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053658533] [2022-11-26 00:05:57,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053658533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:57,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:57,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:05:57,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924941469] [2022-11-26 00:05:57,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:57,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:05:57,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:57,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:05:57,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:05:57,140 INFO L87 Difference]: Start difference. First operand 11658 states and 19259 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-26 00:05:58,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:58,534 INFO L93 Difference]: Finished difference Result 24693 states and 41692 transitions. [2022-11-26 00:05:58,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:05:58,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 147 [2022-11-26 00:05:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:58,634 INFO L225 Difference]: With dead ends: 24693 [2022-11-26 00:05:58,635 INFO L226 Difference]: Without dead ends: 13052 [2022-11-26 00:05:58,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:05:58,837 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 77 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:58,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1711 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13052 states. [2022-11-26 00:06:00,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13052 to 12014. [2022-11-26 00:06:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 8642 states have (on average 1.577991205739412) internal successors, (13637), 9139 states have internal predecessors, (13637), 2652 states have call successors, (2652), 672 states have call predecessors, (2652), 719 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-26 00:06:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 19840 transitions. [2022-11-26 00:06:00,262 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 19840 transitions. Word has length 147 [2022-11-26 00:06:00,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:00,265 INFO L495 AbstractCegarLoop]: Abstraction has 12014 states and 19840 transitions. [2022-11-26 00:06:00,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-26 00:06:00,265 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 19840 transitions. [2022-11-26 00:06:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-26 00:06:00,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:00,274 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:00,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-26 00:06:00,275 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:00,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash -61041865, now seen corresponding path program 1 times [2022-11-26 00:06:00,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:00,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902756257] [2022-11-26 00:06:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:00,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-26 00:06:01,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:01,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902756257] [2022-11-26 00:06:01,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902756257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:01,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162560554] [2022-11-26 00:06:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:01,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:01,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:01,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:01,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:06:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:01,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:06:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 00:06:01,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:01,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162560554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:01,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:06:01,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-11-26 00:06:01,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130343318] [2022-11-26 00:06:01,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:01,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:01,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:01,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:01,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:06:01,777 INFO L87 Difference]: Start difference. First operand 12014 states and 19840 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-26 00:06:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:03,234 INFO L93 Difference]: Finished difference Result 25337 states and 42892 transitions. [2022-11-26 00:06:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:06:03,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 154 [2022-11-26 00:06:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:03,343 INFO L225 Difference]: With dead ends: 25337 [2022-11-26 00:06:03,343 INFO L226 Difference]: Without dead ends: 13340 [2022-11-26 00:06:03,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:06:03,408 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 213 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:03,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1452 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:06:03,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13340 states. [2022-11-26 00:06:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13340 to 13340. [2022-11-26 00:06:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13340 states, 9934 states have (on average 1.6226092208576606) internal successors, (16119), 10431 states have internal predecessors, (16119), 2652 states have call successors, (2652), 706 states have call predecessors, (2652), 753 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-26 00:06:05,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13340 states to 13340 states and 22322 transitions. [2022-11-26 00:06:05,069 INFO L78 Accepts]: Start accepts. Automaton has 13340 states and 22322 transitions. Word has length 154 [2022-11-26 00:06:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:05,070 INFO L495 AbstractCegarLoop]: Abstraction has 13340 states and 22322 transitions. [2022-11-26 00:06:05,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-26 00:06:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 13340 states and 22322 transitions. [2022-11-26 00:06:05,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-26 00:06:05,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:05,083 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:05,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:05,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:05,305 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:05,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1560640415, now seen corresponding path program 1 times [2022-11-26 00:06:05,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:05,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869181169] [2022-11-26 00:06:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:05,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-26 00:06:05,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:05,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869181169] [2022-11-26 00:06:05,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869181169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:05,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993672853] [2022-11-26 00:06:05,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:05,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:05,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:05,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:05,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:06:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:06,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:06:06,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-26 00:06:06,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:06,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993672853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:06,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:06:06,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:06:06,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734597128] [2022-11-26 00:06:06,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:06,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:06,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:06,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:06,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:06:06,340 INFO L87 Difference]: Start difference. First operand 13340 states and 22322 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-26 00:06:07,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:07,768 INFO L93 Difference]: Finished difference Result 27989 states and 47822 transitions. [2022-11-26 00:06:07,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:06:07,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 159 [2022-11-26 00:06:07,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:07,874 INFO L225 Difference]: With dead ends: 27989 [2022-11-26 00:06:07,875 INFO L226 Difference]: Without dead ends: 14666 [2022-11-26 00:06:08,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:06:08,114 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 211 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:08,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1452 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:06:08,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14666 states. [2022-11-26 00:06:09,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14666 to 14666. [2022-11-26 00:06:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14666 states, 11226 states have (on average 1.6569570639586675) internal successors, (18601), 11723 states have internal predecessors, (18601), 2652 states have call successors, (2652), 740 states have call predecessors, (2652), 787 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-26 00:06:09,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14666 states to 14666 states and 24804 transitions. [2022-11-26 00:06:09,196 INFO L78 Accepts]: Start accepts. Automaton has 14666 states and 24804 transitions. Word has length 159 [2022-11-26 00:06:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:09,197 INFO L495 AbstractCegarLoop]: Abstraction has 14666 states and 24804 transitions. [2022-11-26 00:06:09,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-26 00:06:09,197 INFO L276 IsEmpty]: Start isEmpty. Operand 14666 states and 24804 transitions. [2022-11-26 00:06:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-26 00:06:09,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:09,208 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:09,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:09,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:06:09,429 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:09,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:09,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1628656001, now seen corresponding path program 1 times [2022-11-26 00:06:09,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:09,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235065974] [2022-11-26 00:06:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:09,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-26 00:06:09,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:09,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235065974] [2022-11-26 00:06:09,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235065974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:09,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758596967] [2022-11-26 00:06:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:09,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:09,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:09,706 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:09,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:06:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:10,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 1896 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:06:10,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-26 00:06:10,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:10,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758596967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:10,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:06:10,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:06:10,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724975139] [2022-11-26 00:06:10,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:10,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:10,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:10,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:10,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:06:10,326 INFO L87 Difference]: Start difference. First operand 14666 states and 24804 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-26 00:06:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:12,080 INFO L93 Difference]: Finished difference Result 30641 states and 52752 transitions. [2022-11-26 00:06:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:06:12,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 163 [2022-11-26 00:06:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:12,181 INFO L225 Difference]: With dead ends: 30641 [2022-11-26 00:06:12,181 INFO L226 Difference]: Without dead ends: 15992 [2022-11-26 00:06:12,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:06:12,237 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 209 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:12,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1452 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:06:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15992 states. [2022-11-26 00:06:13,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15992 to 15992. [2022-11-26 00:06:13,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15992 states, 12518 states have (on average 1.6842147307876658) internal successors, (21083), 13015 states have internal predecessors, (21083), 2652 states have call successors, (2652), 774 states have call predecessors, (2652), 821 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-26 00:06:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15992 states to 15992 states and 27286 transitions. [2022-11-26 00:06:13,219 INFO L78 Accepts]: Start accepts. Automaton has 15992 states and 27286 transitions. Word has length 163 [2022-11-26 00:06:13,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:13,219 INFO L495 AbstractCegarLoop]: Abstraction has 15992 states and 27286 transitions. [2022-11-26 00:06:13,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-26 00:06:13,220 INFO L276 IsEmpty]: Start isEmpty. Operand 15992 states and 27286 transitions. [2022-11-26 00:06:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-26 00:06:13,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:13,229 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:13,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:13,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:06:13,446 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:13,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:13,447 INFO L85 PathProgramCache]: Analyzing trace with hash 908791093, now seen corresponding path program 1 times [2022-11-26 00:06:13,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:13,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911760640] [2022-11-26 00:06:13,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:13,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-26 00:06:13,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:13,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911760640] [2022-11-26 00:06:13,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911760640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:13,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883643039] [2022-11-26 00:06:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:13,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:13,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:13,706 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:13,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:06:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:14,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1899 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:06:14,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-26 00:06:14,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:14,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883643039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:14,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:06:14,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:06:14,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128867213] [2022-11-26 00:06:14,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:14,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:14,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:06:14,323 INFO L87 Difference]: Start difference. First operand 15992 states and 27286 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-26 00:06:15,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:15,658 INFO L93 Difference]: Finished difference Result 33293 states and 57682 transitions. [2022-11-26 00:06:15,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:06:15,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 166 [2022-11-26 00:06:15,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:15,770 INFO L225 Difference]: With dead ends: 33293 [2022-11-26 00:06:15,770 INFO L226 Difference]: Without dead ends: 17318 [2022-11-26 00:06:15,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:06:15,982 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 207 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:15,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1452 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:06:16,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17318 states. [2022-11-26 00:06:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17318 to 17318. [2022-11-26 00:06:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17318 states, 13810 states have (on average 1.7063721940622738) internal successors, (23565), 14307 states have internal predecessors, (23565), 2652 states have call successors, (2652), 808 states have call predecessors, (2652), 855 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-26 00:06:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17318 states to 17318 states and 29768 transitions. [2022-11-26 00:06:17,360 INFO L78 Accepts]: Start accepts. Automaton has 17318 states and 29768 transitions. Word has length 166 [2022-11-26 00:06:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:17,361 INFO L495 AbstractCegarLoop]: Abstraction has 17318 states and 29768 transitions. [2022-11-26 00:06:17,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-26 00:06:17,362 INFO L276 IsEmpty]: Start isEmpty. Operand 17318 states and 29768 transitions. [2022-11-26 00:06:17,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-26 00:06:17,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:17,371 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:17,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:17,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:17,580 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:17,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1331330039, now seen corresponding path program 1 times [2022-11-26 00:06:17,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:17,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983634440] [2022-11-26 00:06:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:17,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:06:24,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:24,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983634440] [2022-11-26 00:06:24,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983634440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:24,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700677751] [2022-11-26 00:06:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:24,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:24,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:24,111 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:24,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:06:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:24,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 1901 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:06:24,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-26 00:06:24,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:24,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700677751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:24,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:06:24,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [37] total 39 [2022-11-26 00:06:24,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538162280] [2022-11-26 00:06:24,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:24,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:24,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:24,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:24,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:06:24,842 INFO L87 Difference]: Start difference. First operand 17318 states and 29768 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-26 00:06:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:26,013 INFO L93 Difference]: Finished difference Result 35945 states and 62612 transitions. [2022-11-26 00:06:26,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:06:26,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 168 [2022-11-26 00:06:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:26,119 INFO L225 Difference]: With dead ends: 35945 [2022-11-26 00:06:26,120 INFO L226 Difference]: Without dead ends: 18644 [2022-11-26 00:06:26,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=89, Invalid=1471, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:06:26,178 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 205 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:26,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1452 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:06:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18644 states. [2022-11-26 00:06:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18644 to 18644. [2022-11-26 00:06:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18644 states, 15102 states have (on average 1.7247384452390413) internal successors, (26047), 15599 states have internal predecessors, (26047), 2652 states have call successors, (2652), 842 states have call predecessors, (2652), 889 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-26 00:06:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18644 states to 18644 states and 32250 transitions. [2022-11-26 00:06:27,427 INFO L78 Accepts]: Start accepts. Automaton has 18644 states and 32250 transitions. Word has length 168 [2022-11-26 00:06:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:27,428 INFO L495 AbstractCegarLoop]: Abstraction has 18644 states and 32250 transitions. [2022-11-26 00:06:27,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-26 00:06:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 18644 states and 32250 transitions. [2022-11-26 00:06:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-26 00:06:27,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:27,441 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:27,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:27,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:06:27,652 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:27,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2021768024, now seen corresponding path program 1 times [2022-11-26 00:06:27,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:27,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474517051] [2022-11-26 00:06:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:27,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-26 00:06:33,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:33,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474517051] [2022-11-26 00:06:33,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474517051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:33,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734254806] [2022-11-26 00:06:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:33,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:33,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:33,721 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:33,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:06:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:34,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:06:34,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-26 00:06:34,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:34,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734254806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:34,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:06:34,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [37] total 39 [2022-11-26 00:06:34,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345998029] [2022-11-26 00:06:34,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:34,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:34,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:34,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:34,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:06:34,568 INFO L87 Difference]: Start difference. First operand 18644 states and 32250 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-26 00:06:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:35,451 INFO L93 Difference]: Finished difference Result 38660 states and 66835 transitions. [2022-11-26 00:06:35,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:06:35,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 168 [2022-11-26 00:06:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:35,521 INFO L225 Difference]: With dead ends: 38660 [2022-11-26 00:06:35,521 INFO L226 Difference]: Without dead ends: 20078 [2022-11-26 00:06:35,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=1471, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:06:35,578 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 325 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:35,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1574 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:06:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20078 states. [2022-11-26 00:06:36,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20078 to 19890. [2022-11-26 00:06:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19890 states, 15884 states have (on average 1.7021531100478469) internal successors, (27037), 16400 states have internal predecessors, (27037), 2943 states have call successors, (2943), 1029 states have call predecessors, (2943), 1062 states have return successors, (4331), 2676 states have call predecessors, (4331), 2938 states have call successors, (4331) [2022-11-26 00:06:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19890 states to 19890 states and 34311 transitions. [2022-11-26 00:06:36,597 INFO L78 Accepts]: Start accepts. Automaton has 19890 states and 34311 transitions. Word has length 168 [2022-11-26 00:06:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:36,598 INFO L495 AbstractCegarLoop]: Abstraction has 19890 states and 34311 transitions. [2022-11-26 00:06:36,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-26 00:06:36,598 INFO L276 IsEmpty]: Start isEmpty. Operand 19890 states and 34311 transitions. [2022-11-26 00:06:36,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-26 00:06:36,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:36,610 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:36,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:36,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:06:36,821 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:36,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:36,822 INFO L85 PathProgramCache]: Analyzing trace with hash 717778979, now seen corresponding path program 1 times [2022-11-26 00:06:36,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:36,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663267801] [2022-11-26 00:06:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:36,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-26 00:06:41,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:41,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663267801] [2022-11-26 00:06:41,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663267801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:41,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275579493] [2022-11-26 00:06:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:41,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:41,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:41,855 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:41,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:06:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:42,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:06:42,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-26 00:06:43,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:43,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275579493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:43,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:06:43,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [37] total 44 [2022-11-26 00:06:43,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525793819] [2022-11-26 00:06:43,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:43,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:06:43,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:43,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:06:43,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1763, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:06:43,051 INFO L87 Difference]: Start difference. First operand 19890 states and 34311 transitions. Second operand has 9 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-26 00:06:49,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:49,073 INFO L93 Difference]: Finished difference Result 41907 states and 72917 transitions. [2022-11-26 00:06:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:06:49,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) Word has length 171 [2022-11-26 00:06:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:49,171 INFO L225 Difference]: With dead ends: 41907 [2022-11-26 00:06:49,171 INFO L226 Difference]: Without dead ends: 22039 [2022-11-26 00:06:49,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=244, Invalid=2408, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:06:49,238 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 1229 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 5415 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 5923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 5415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:49,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1369 Valid, 1868 Invalid, 5923 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [508 Valid, 5415 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-26 00:06:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22039 states. [2022-11-26 00:06:50,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22039 to 21457. [2022-11-26 00:06:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21457 states, 16982 states have (on average 1.6668236956777764) internal successors, (28306), 17541 states have internal predecessors, (28306), 3195 states have call successors, (3195), 1237 states have call predecessors, (3195), 1279 states have return successors, (4924), 2918 states have call predecessors, (4924), 3190 states have call successors, (4924) [2022-11-26 00:06:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21457 states to 21457 states and 36425 transitions. [2022-11-26 00:06:51,008 INFO L78 Accepts]: Start accepts. Automaton has 21457 states and 36425 transitions. Word has length 171 [2022-11-26 00:06:51,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:51,009 INFO L495 AbstractCegarLoop]: Abstraction has 21457 states and 36425 transitions. [2022-11-26 00:06:51,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-26 00:06:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 21457 states and 36425 transitions. [2022-11-26 00:06:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-26 00:06:51,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:51,020 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:51,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:51,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 00:06:51,231 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:51,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:51,232 INFO L85 PathProgramCache]: Analyzing trace with hash -810272456, now seen corresponding path program 1 times [2022-11-26 00:06:51,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:51,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811178158] [2022-11-26 00:06:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:51,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-26 00:06:55,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:06:55,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811178158] [2022-11-26 00:06:55,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811178158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:06:55,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136231016] [2022-11-26 00:06:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:55,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:55,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:55,771 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:55,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:06:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:06:56,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:06:56,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-26 00:06:56,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:06:56,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136231016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:06:56,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:06:56,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [37] total 39 [2022-11-26 00:06:56,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806699814] [2022-11-26 00:06:56,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:06:56,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:06:56,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:06:56,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:06:56,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 00:06:56,469 INFO L87 Difference]: Start difference. First operand 21457 states and 36425 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2022-11-26 00:06:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:57,453 INFO L93 Difference]: Finished difference Result 22189 states and 38920 transitions. [2022-11-26 00:06:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:06:57,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) Word has length 171 [2022-11-26 00:06:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:57,585 INFO L225 Difference]: With dead ends: 22189 [2022-11-26 00:06:57,585 INFO L226 Difference]: Without dead ends: 22103 [2022-11-26 00:06:57,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=1471, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:06:57,603 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 44 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:57,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1731 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:06:57,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22103 states. [2022-11-26 00:06:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22103 to 21557. [2022-11-26 00:06:58,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21557 states, 17082 states have (on average 1.6629200327830465) internal successors, (28406), 17641 states have internal predecessors, (28406), 3195 states have call successors, (3195), 1237 states have call predecessors, (3195), 1279 states have return successors, (4924), 2918 states have call predecessors, (4924), 3190 states have call successors, (4924) [2022-11-26 00:06:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21557 states to 21557 states and 36525 transitions. [2022-11-26 00:06:58,897 INFO L78 Accepts]: Start accepts. Automaton has 21557 states and 36525 transitions. Word has length 171 [2022-11-26 00:06:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:58,898 INFO L495 AbstractCegarLoop]: Abstraction has 21557 states and 36525 transitions. [2022-11-26 00:06:58,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2022-11-26 00:06:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 21557 states and 36525 transitions. [2022-11-26 00:06:58,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-26 00:06:58,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:58,909 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:58,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-26 00:06:59,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:06:59,119 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:06:59,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:59,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1561524590, now seen corresponding path program 1 times [2022-11-26 00:06:59,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:06:59,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61741934] [2022-11-26 00:06:59,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:06:59,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:06:59,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-26 00:07:03,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:07:03,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61741934] [2022-11-26 00:07:03,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61741934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:07:03,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142119850] [2022-11-26 00:07:03,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:07:03,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:03,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:07:03,560 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:07:03,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d47cbb2-1a8a-4c7e-8d64-b11e6114035f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:07:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:07:04,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 1968 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-26 00:07:04,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:07:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-26 00:07:05,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:09,600 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-26 00:07:21,092 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-26 00:07:21,568 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-26 00:07:32,889 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-26 00:07:33,343 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-26 00:07:48,318 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-26 00:07:48,504 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-11-26 00:12:12,657 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions. [2022-11-26 00:12:13,399 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-26 00:12:24,595 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions.