./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/kundu.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/kundu.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 941010afb19994aa6e2e07f5c4b80f87a4c5e60b4e0ef3217e91339d9dc3aacb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:01:42,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:01:42,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:01:42,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:01:42,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:01:42,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:01:42,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:01:42,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:01:42,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:01:42,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:01:42,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:01:42,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:01:42,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:01:42,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:01:42,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:01:42,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:01:42,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:01:42,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:01:42,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:01:42,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:01:42,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:01:42,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:01:42,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:01:42,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:01:42,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:01:42,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:01:42,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:01:42,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:01:42,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:01:42,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:01:42,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:01:42,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:01:42,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:01:42,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:01:42,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:01:42,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:01:42,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:01:42,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:01:42,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:01:42,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:01:42,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:01:42,267 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:01:42,316 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:01:42,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:01:42,319 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:01:42,319 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:01:42,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:01:42,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:01:42,327 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:01:42,327 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:01:42,327 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:01:42,327 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:01:42,329 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:01:42,329 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:01:42,329 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:01:42,329 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:01:42,330 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:01:42,330 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:01:42,330 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:01:42,330 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:01:42,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:01:42,331 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:01:42,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:01:42,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:01:42,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:01:42,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:01:42,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:01:42,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:01:42,335 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:01:42,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:01:42,335 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:01:42,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:01:42,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:01:42,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:01:42,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:01:42,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:01:42,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:01:42,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:01:42,337 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:01:42,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:01:42,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:01:42,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:01:42,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:01:42,338 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 941010afb19994aa6e2e07f5c4b80f87a4c5e60b4e0ef3217e91339d9dc3aacb [2021-11-21 00:01:42,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:01:42,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:01:42,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:01:42,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:01:42,626 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:01:42,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/systemc/kundu.cil.c [2021-11-21 00:01:42,709 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/data/539c377d6/a6cce30106fa4c2fb65b230eb455acb1/FLAGe47fc30e5 [2021-11-21 00:01:43,288 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:01:43,288 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/sv-benchmarks/c/systemc/kundu.cil.c [2021-11-21 00:01:43,308 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/data/539c377d6/a6cce30106fa4c2fb65b230eb455acb1/FLAGe47fc30e5 [2021-11-21 00:01:43,612 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/data/539c377d6/a6cce30106fa4c2fb65b230eb455acb1 [2021-11-21 00:01:43,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:01:43,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:01:43,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:01:43,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:01:43,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:01:43,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:01:43" (1/1) ... [2021-11-21 00:01:43,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3375b0ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:43, skipping insertion in model container [2021-11-21 00:01:43,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:01:43" (1/1) ... [2021-11-21 00:01:43,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:01:43,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:01:43,847 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/sv-benchmarks/c/systemc/kundu.cil.c[635,648] [2021-11-21 00:01:43,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:01:43,919 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:01:43,931 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/sv-benchmarks/c/systemc/kundu.cil.c[635,648] [2021-11-21 00:01:43,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:01:43,979 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:01:43,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:43 WrapperNode [2021-11-21 00:01:43,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:01:43,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:01:43,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:01:43,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:01:43,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:43" (1/1) ... [2021-11-21 00:01:43,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:43" (1/1) ... [2021-11-21 00:01:44,024 INFO L137 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 315 [2021-11-21 00:01:44,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:01:44,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:01:44,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:01:44,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:01:44,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:43" (1/1) ... [2021-11-21 00:01:44,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:43" (1/1) ... [2021-11-21 00:01:44,035 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:43" (1/1) ... [2021-11-21 00:01:44,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:43" (1/1) ... [2021-11-21 00:01:44,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:43" (1/1) ... [2021-11-21 00:01:44,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:43" (1/1) ... [2021-11-21 00:01:44,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:43" (1/1) ... [2021-11-21 00:01:44,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:01:44,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:01:44,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:01:44,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:01:44,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:43" (1/1) ... [2021-11-21 00:01:44,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:01:44,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:44,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:01:44,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82cf8cf8-9377-4977-800b-65863c72a1ba/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:01:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:01:44,153 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2021-11-21 00:01:44,153 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2021-11-21 00:01:44,154 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-21 00:01:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-21 00:01:44,154 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-21 00:01:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-21 00:01:44,154 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-21 00:01:44,154 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-21 00:01:44,155 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-21 00:01:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-21 00:01:44,155 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-21 00:01:44,155 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-21 00:01:44,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:01:44,156 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-21 00:01:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-21 00:01:44,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:01:44,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:01:44,234 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:01:44,236 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:01:44,629 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:01:44,780 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:01:44,780 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-21 00:01:44,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:01:44 BoogieIcfgContainer [2021-11-21 00:01:44,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:01:44,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:01:44,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:01:44,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:01:44,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:01:43" (1/3) ... [2021-11-21 00:01:44,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c63e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:01:44, skipping insertion in model container [2021-11-21 00:01:44,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:43" (2/3) ... [2021-11-21 00:01:44,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c63e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:01:44, skipping insertion in model container [2021-11-21 00:01:44,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:01:44" (3/3) ... [2021-11-21 00:01:44,794 INFO L111 eAbstractionObserver]: Analyzing ICFG kundu.cil.c [2021-11-21 00:01:44,802 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:01:44,802 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:01:44,867 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:01:44,878 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:01:44,878 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:01:44,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-21 00:01:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 00:01:44,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:44,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:44,932 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:44,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:44,938 INFO L85 PathProgramCache]: Analyzing trace with hash 515396759, now seen corresponding path program 1 times [2021-11-21 00:01:44,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:44,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526216642] [2021-11-21 00:01:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:44,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:01:45,218 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:45,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526216642] [2021-11-21 00:01:45,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526216642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:45,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:45,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:01:45,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719279369] [2021-11-21 00:01:45,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:45,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:01:45,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:45,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:01:45,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:01:45,275 INFO L87 Difference]: Start difference. First operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 70 states have internal predecessors, (98), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:01:45,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:45,659 INFO L93 Difference]: Finished difference Result 263 states and 391 transitions. [2021-11-21 00:01:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:01:45,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-11-21 00:01:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:45,676 INFO L225 Difference]: With dead ends: 263 [2021-11-21 00:01:45,676 INFO L226 Difference]: Without dead ends: 171 [2021-11-21 00:01:45,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:01:45,690 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 225 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:45,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 348 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:01:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-21 00:01:45,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2021-11-21 00:01:45,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 123 states have (on average 1.4308943089430894) internal successors, (176), 127 states have internal predecessors, (176), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-21 00:01:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 231 transitions. [2021-11-21 00:01:45,753 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 231 transitions. Word has length 39 [2021-11-21 00:01:45,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:45,754 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 231 transitions. [2021-11-21 00:01:45,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:01:45,754 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 231 transitions. [2021-11-21 00:01:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 00:01:45,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:45,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:45,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:01:45,757 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:45,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:45,758 INFO L85 PathProgramCache]: Analyzing trace with hash -456277928, now seen corresponding path program 1 times [2021-11-21 00:01:45,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:45,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680180066] [2021-11-21 00:01:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:45,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:01:45,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:45,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680180066] [2021-11-21 00:01:45,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680180066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:45,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:45,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:01:45,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582582597] [2021-11-21 00:01:45,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:45,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:01:45,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:45,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:01:45,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:01:45,883 INFO L87 Difference]: Start difference. First operand 165 states and 231 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:01:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:46,346 INFO L93 Difference]: Finished difference Result 693 states and 969 transitions. [2021-11-21 00:01:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:01:46,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-11-21 00:01:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:46,359 INFO L225 Difference]: With dead ends: 693 [2021-11-21 00:01:46,360 INFO L226 Difference]: Without dead ends: 508 [2021-11-21 00:01:46,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:01:46,371 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 474 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:46,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 533 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:01:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-21 00:01:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 389. [2021-11-21 00:01:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 298 states have (on average 1.4261744966442953) internal successors, (425), 303 states have internal predecessors, (425), 60 states have call successors, (60), 30 states have call predecessors, (60), 30 states have return successors, (60), 56 states have call predecessors, (60), 57 states have call successors, (60) [2021-11-21 00:01:46,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 545 transitions. [2021-11-21 00:01:46,449 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 545 transitions. Word has length 39 [2021-11-21 00:01:46,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:46,450 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 545 transitions. [2021-11-21 00:01:46,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:01:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 545 transitions. [2021-11-21 00:01:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 00:01:46,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:46,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:46,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:01:46,453 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:46,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2056247895, now seen corresponding path program 1 times [2021-11-21 00:01:46,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:46,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086220990] [2021-11-21 00:01:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:46,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:01:46,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:46,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086220990] [2021-11-21 00:01:46,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086220990] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:46,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:46,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:01:46,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751084622] [2021-11-21 00:01:46,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:46,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:01:46,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:46,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:01:46,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:01:46,527 INFO L87 Difference]: Start difference. First operand 389 states and 545 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 00:01:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:46,681 INFO L93 Difference]: Finished difference Result 1011 states and 1419 transitions. [2021-11-21 00:01:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:01:46,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 40 [2021-11-21 00:01:46,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:46,687 INFO L225 Difference]: With dead ends: 1011 [2021-11-21 00:01:46,687 INFO L226 Difference]: Without dead ends: 628 [2021-11-21 00:01:46,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:01:46,690 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 90 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:46,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 445 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:01:46,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-11-21 00:01:46,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 607. [2021-11-21 00:01:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 463 states have (on average 1.4168466522678185) internal successors, (656), 476 states have internal predecessors, (656), 93 states have call successors, (93), 50 states have call predecessors, (93), 50 states have return successors, (93), 81 states have call predecessors, (93), 90 states have call successors, (93) [2021-11-21 00:01:46,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 842 transitions. [2021-11-21 00:01:46,747 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 842 transitions. Word has length 40 [2021-11-21 00:01:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:46,748 INFO L470 AbstractCegarLoop]: Abstraction has 607 states and 842 transitions. [2021-11-21 00:01:46,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 00:01:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 842 transitions. [2021-11-21 00:01:46,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 00:01:46,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:46,751 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:46,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:01:46,752 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:46,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:46,752 INFO L85 PathProgramCache]: Analyzing trace with hash -422160077, now seen corresponding path program 1 times [2021-11-21 00:01:46,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:46,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237534542] [2021-11-21 00:01:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:46,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:01:46,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:46,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237534542] [2021-11-21 00:01:46,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237534542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:46,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:46,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:01:46,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793456106] [2021-11-21 00:01:46,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:46,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:01:46,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:46,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:01:46,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:01:46,861 INFO L87 Difference]: Start difference. First operand 607 states and 842 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 00:01:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:47,147 INFO L93 Difference]: Finished difference Result 1710 states and 2394 transitions. [2021-11-21 00:01:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:01:47,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 50 [2021-11-21 00:01:47,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:47,156 INFO L225 Difference]: With dead ends: 1710 [2021-11-21 00:01:47,157 INFO L226 Difference]: Without dead ends: 1171 [2021-11-21 00:01:47,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:01:47,160 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 197 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:47,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 778 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:01:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-11-21 00:01:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1135. [2021-11-21 00:01:47,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 872 states have (on average 1.4094036697247707) internal successors, (1229), 895 states have internal predecessors, (1229), 168 states have call successors, (168), 93 states have call predecessors, (168), 94 states have return successors, (170), 147 states have call predecessors, (170), 165 states have call successors, (170) [2021-11-21 00:01:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1567 transitions. [2021-11-21 00:01:47,264 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1567 transitions. Word has length 50 [2021-11-21 00:01:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:47,265 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1567 transitions. [2021-11-21 00:01:47,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 00:01:47,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1567 transitions. [2021-11-21 00:01:47,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-21 00:01:47,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:47,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:47,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:01:47,270 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:47,271 INFO L85 PathProgramCache]: Analyzing trace with hash 705776509, now seen corresponding path program 1 times [2021-11-21 00:01:47,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:47,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105890002] [2021-11-21 00:01:47,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:47,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:01:47,349 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:47,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105890002] [2021-11-21 00:01:47,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105890002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:47,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:47,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:01:47,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586810719] [2021-11-21 00:01:47,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:47,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:01:47,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:47,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:01:47,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:01:47,352 INFO L87 Difference]: Start difference. First operand 1135 states and 1567 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 00:01:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:47,701 INFO L93 Difference]: Finished difference Result 3491 states and 4846 transitions. [2021-11-21 00:01:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:01:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2021-11-21 00:01:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:47,723 INFO L225 Difference]: With dead ends: 3491 [2021-11-21 00:01:47,724 INFO L226 Difference]: Without dead ends: 2362 [2021-11-21 00:01:47,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:01:47,733 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 333 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:47,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 264 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:01:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-11-21 00:01:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2065. [2021-11-21 00:01:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 1597 states have (on average 1.3994990607388853) internal successors, (2235), 1621 states have internal predecessors, (2235), 291 states have call successors, (291), 173 states have call predecessors, (291), 176 states have return successors, (297), 271 states have call predecessors, (297), 288 states have call successors, (297) [2021-11-21 00:01:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 2823 transitions. [2021-11-21 00:01:47,923 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 2823 transitions. Word has length 53 [2021-11-21 00:01:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:47,923 INFO L470 AbstractCegarLoop]: Abstraction has 2065 states and 2823 transitions. [2021-11-21 00:01:47,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-21 00:01:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 2823 transitions. [2021-11-21 00:01:47,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 00:01:47,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:47,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:47,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:01:47,931 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2102794554, now seen corresponding path program 1 times [2021-11-21 00:01:47,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:47,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102664055] [2021-11-21 00:01:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:47,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:01:47,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:47,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102664055] [2021-11-21 00:01:47,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102664055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:47,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:47,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:01:47,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006393233] [2021-11-21 00:01:47,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:47,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:01:47,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:47,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:01:47,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:01:47,995 INFO L87 Difference]: Start difference. First operand 2065 states and 2823 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 00:01:48,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:48,252 INFO L93 Difference]: Finished difference Result 4741 states and 6485 transitions. [2021-11-21 00:01:48,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:01:48,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 54 [2021-11-21 00:01:48,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:48,271 INFO L225 Difference]: With dead ends: 4741 [2021-11-21 00:01:48,272 INFO L226 Difference]: Without dead ends: 2681 [2021-11-21 00:01:48,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:01:48,282 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 93 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:48,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 212 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:01:48,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-11-21 00:01:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2242. [2021-11-21 00:01:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1689 states have (on average 1.3457667258732977) internal successors, (2273), 1717 states have internal predecessors, (2273), 346 states have call successors, (346), 207 states have call predecessors, (346), 206 states have return successors, (343), 318 states have call predecessors, (343), 343 states have call successors, (343) [2021-11-21 00:01:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 2962 transitions. [2021-11-21 00:01:48,477 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 2962 transitions. Word has length 54 [2021-11-21 00:01:48,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:48,480 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 2962 transitions. [2021-11-21 00:01:48,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 00:01:48,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 2962 transitions. [2021-11-21 00:01:48,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-21 00:01:48,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:48,483 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:48,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:01:48,483 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:48,484 INFO L85 PathProgramCache]: Analyzing trace with hash 493560610, now seen corresponding path program 1 times [2021-11-21 00:01:48,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:48,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210466209] [2021-11-21 00:01:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:48,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:01:48,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:48,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210466209] [2021-11-21 00:01:48,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210466209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:48,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:48,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:01:48,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329243639] [2021-11-21 00:01:48,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:48,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:01:48,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:48,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:01:48,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:01:48,608 INFO L87 Difference]: Start difference. First operand 2242 states and 2962 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 00:01:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:49,191 INFO L93 Difference]: Finished difference Result 6180 states and 8394 transitions. [2021-11-21 00:01:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:01:49,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2021-11-21 00:01:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:49,222 INFO L225 Difference]: With dead ends: 6180 [2021-11-21 00:01:49,222 INFO L226 Difference]: Without dead ends: 4169 [2021-11-21 00:01:49,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:01:49,230 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 404 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:49,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 623 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:01:49,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-11-21 00:01:49,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3198. [2021-11-21 00:01:49,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 2417 states have (on average 1.3475382705833678) internal successors, (3257), 2447 states have internal predecessors, (3257), 488 states have call successors, (488), 293 states have call predecessors, (488), 292 states have return successors, (485), 458 states have call predecessors, (485), 485 states have call successors, (485) [2021-11-21 00:01:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 4230 transitions. [2021-11-21 00:01:49,542 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 4230 transitions. Word has length 55 [2021-11-21 00:01:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:49,543 INFO L470 AbstractCegarLoop]: Abstraction has 3198 states and 4230 transitions. [2021-11-21 00:01:49,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 00:01:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 4230 transitions. [2021-11-21 00:01:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-21 00:01:49,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:49,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:49,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:01:49,546 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:49,546 INFO L85 PathProgramCache]: Analyzing trace with hash 432913418, now seen corresponding path program 1 times [2021-11-21 00:01:49,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:49,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790463313] [2021-11-21 00:01:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:49,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:01:49,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:49,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790463313] [2021-11-21 00:01:49,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790463313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:49,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:49,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:01:49,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850042508] [2021-11-21 00:01:49,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:49,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:01:49,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:01:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:01:49,605 INFO L87 Difference]: Start difference. First operand 3198 states and 4230 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 00:01:50,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:50,265 INFO L93 Difference]: Finished difference Result 9896 states and 13111 transitions. [2021-11-21 00:01:50,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:01:50,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57 [2021-11-21 00:01:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:50,309 INFO L225 Difference]: With dead ends: 9896 [2021-11-21 00:01:50,309 INFO L226 Difference]: Without dead ends: 6704 [2021-11-21 00:01:50,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:01:50,320 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 360 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:50,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 279 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:01:50,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6704 states. [2021-11-21 00:01:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6704 to 6126. [2021-11-21 00:01:50,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6126 states, 4617 states have (on average 1.327485380116959) internal successors, (6129), 4655 states have internal predecessors, (6129), 936 states have call successors, (936), 573 states have call predecessors, (936), 572 states have return successors, (933), 898 states have call predecessors, (933), 933 states have call successors, (933) [2021-11-21 00:01:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6126 states to 6126 states and 7998 transitions. [2021-11-21 00:01:50,880 INFO L78 Accepts]: Start accepts. Automaton has 6126 states and 7998 transitions. Word has length 57 [2021-11-21 00:01:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:50,880 INFO L470 AbstractCegarLoop]: Abstraction has 6126 states and 7998 transitions. [2021-11-21 00:01:50,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 00:01:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6126 states and 7998 transitions. [2021-11-21 00:01:50,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-21 00:01:50,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:50,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:50,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:01:50,886 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:50,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:50,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2052776908, now seen corresponding path program 1 times [2021-11-21 00:01:50,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:50,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305661726] [2021-11-21 00:01:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:50,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:01:50,961 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:50,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305661726] [2021-11-21 00:01:50,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305661726] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:50,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:50,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:01:50,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044012255] [2021-11-21 00:01:50,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:50,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:01:50,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:50,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:01:50,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:01:50,964 INFO L87 Difference]: Start difference. First operand 6126 states and 7998 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 00:01:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:52,033 INFO L93 Difference]: Finished difference Result 20396 states and 27116 transitions. [2021-11-21 00:01:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:01:52,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2021-11-21 00:01:52,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:52,141 INFO L225 Difference]: With dead ends: 20396 [2021-11-21 00:01:52,141 INFO L226 Difference]: Without dead ends: 14276 [2021-11-21 00:01:52,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:01:52,164 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 471 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:52,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 493 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:01:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14276 states. [2021-11-21 00:01:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14276 to 10725. [2021-11-21 00:01:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10725 states, 8171 states have (on average 1.3402276343164852) internal successors, (10951), 8265 states have internal predecessors, (10951), 1543 states have call successors, (1543), 1011 states have call predecessors, (1543), 1010 states have return successors, (1632), 1449 states have call predecessors, (1632), 1540 states have call successors, (1632) [2021-11-21 00:01:53,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10725 states to 10725 states and 14126 transitions. [2021-11-21 00:01:53,193 INFO L78 Accepts]: Start accepts. Automaton has 10725 states and 14126 transitions. Word has length 59 [2021-11-21 00:01:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:53,194 INFO L470 AbstractCegarLoop]: Abstraction has 10725 states and 14126 transitions. [2021-11-21 00:01:53,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 00:01:53,194 INFO L276 IsEmpty]: Start isEmpty. Operand 10725 states and 14126 transitions. [2021-11-21 00:01:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 00:01:53,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:53,198 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:01:53,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:01:53,199 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:53,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:53,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1805023809, now seen corresponding path program 1 times [2021-11-21 00:01:53,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:53,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099210415] [2021-11-21 00:01:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:53,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:01:53,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:53,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099210415] [2021-11-21 00:01:53,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099210415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:53,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:53,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:01:53,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821824887] [2021-11-21 00:01:53,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:53,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:01:53,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:01:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:01:53,251 INFO L87 Difference]: Start difference. First operand 10725 states and 14126 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:01:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:54,502 INFO L93 Difference]: Finished difference Result 25885 states and 34123 transitions. [2021-11-21 00:01:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:01:54,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2021-11-21 00:01:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:54,565 INFO L225 Difference]: With dead ends: 25885 [2021-11-21 00:01:54,566 INFO L226 Difference]: Without dead ends: 15708 [2021-11-21 00:01:54,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:01:54,595 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 284 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:54,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 576 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:01:54,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15708 states. [2021-11-21 00:01:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15708 to 15433. [2021-11-21 00:01:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15433 states, 11779 states have (on average 1.3395874013074114) internal successors, (15779), 11883 states have internal predecessors, (15779), 2209 states have call successors, (2209), 1445 states have call predecessors, (2209), 1444 states have return successors, (2334), 2105 states have call predecessors, (2334), 2206 states have call successors, (2334) [2021-11-21 00:01:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15433 states to 15433 states and 20322 transitions. [2021-11-21 00:01:55,673 INFO L78 Accepts]: Start accepts. Automaton has 15433 states and 20322 transitions. Word has length 63 [2021-11-21 00:01:55,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:55,673 INFO L470 AbstractCegarLoop]: Abstraction has 15433 states and 20322 transitions. [2021-11-21 00:01:55,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:01:55,675 INFO L276 IsEmpty]: Start isEmpty. Operand 15433 states and 20322 transitions. [2021-11-21 00:01:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 00:01:55,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:55,679 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-21 00:01:55,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:01:55,679 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:55,680 INFO L85 PathProgramCache]: Analyzing trace with hash -505922541, now seen corresponding path program 1 times [2021-11-21 00:01:55,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:55,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112338912] [2021-11-21 00:01:55,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:55,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:01:55,749 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:55,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112338912] [2021-11-21 00:01:55,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112338912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:55,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:55,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:01:55,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247556032] [2021-11-21 00:01:55,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:55,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:01:55,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:55,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:01:55,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:01:55,752 INFO L87 Difference]: Start difference. First operand 15433 states and 20322 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:01:58,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:58,305 INFO L93 Difference]: Finished difference Result 48675 states and 66346 transitions. [2021-11-21 00:01:58,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:01:58,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-11-21 00:01:58,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:58,446 INFO L225 Difference]: With dead ends: 48675 [2021-11-21 00:01:58,446 INFO L226 Difference]: Without dead ends: 33790 [2021-11-21 00:01:58,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:01:58,484 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 449 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:58,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 1382 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:01:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33790 states. [2021-11-21 00:02:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33790 to 24281. [2021-11-21 00:02:00,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24281 states, 18575 states have (on average 1.3428263795423956) internal successors, (24943), 18697 states have internal predecessors, (24943), 3451 states have call successors, (3451), 2255 states have call predecessors, (3451), 2254 states have return successors, (3668), 3329 states have call predecessors, (3668), 3448 states have call successors, (3668) [2021-11-21 00:02:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24281 states to 24281 states and 32062 transitions. [2021-11-21 00:02:00,230 INFO L78 Accepts]: Start accepts. Automaton has 24281 states and 32062 transitions. Word has length 66 [2021-11-21 00:02:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:00,230 INFO L470 AbstractCegarLoop]: Abstraction has 24281 states and 32062 transitions. [2021-11-21 00:02:00,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:02:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 24281 states and 32062 transitions. [2021-11-21 00:02:00,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 00:02:00,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:00,241 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:00,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:02:00,241 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:00,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:00,242 INFO L85 PathProgramCache]: Analyzing trace with hash -349305876, now seen corresponding path program 1 times [2021-11-21 00:02:00,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:00,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063438284] [2021-11-21 00:02:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:00,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:02:00,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:00,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063438284] [2021-11-21 00:02:00,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063438284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:02:00,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:02:00,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:02:00,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691134354] [2021-11-21 00:02:00,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:02:00,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:02:00,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:00,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:02:00,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:02:00,331 INFO L87 Difference]: Start difference. First operand 24281 states and 32062 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 00:02:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:03,032 INFO L93 Difference]: Finished difference Result 66584 states and 88072 transitions. [2021-11-21 00:02:03,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:02:03,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 70 [2021-11-21 00:02:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:03,265 INFO L225 Difference]: With dead ends: 66584 [2021-11-21 00:02:03,265 INFO L226 Difference]: Without dead ends: 42309 [2021-11-21 00:02:03,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:02:03,315 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 251 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:03,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 314 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:02:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42309 states. [2021-11-21 00:02:05,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42309 to 41466. [2021-11-21 00:02:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41466 states, 31067 states have (on average 1.3103614768081888) internal successors, (40709), 31247 states have internal predecessors, (40709), 6364 states have call successors, (6364), 4035 states have call predecessors, (6364), 4034 states have return successors, (6801), 6184 states have call predecessors, (6801), 6361 states have call successors, (6801) [2021-11-21 00:02:06,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41466 states to 41466 states and 53874 transitions. [2021-11-21 00:02:06,039 INFO L78 Accepts]: Start accepts. Automaton has 41466 states and 53874 transitions. Word has length 70 [2021-11-21 00:02:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:06,040 INFO L470 AbstractCegarLoop]: Abstraction has 41466 states and 53874 transitions. [2021-11-21 00:02:06,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 00:02:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 41466 states and 53874 transitions. [2021-11-21 00:02:06,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-21 00:02:06,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:06,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:06,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:02:06,045 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash -693378895, now seen corresponding path program 1 times [2021-11-21 00:02:06,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:06,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087701553] [2021-11-21 00:02:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:06,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:02:06,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:06,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087701553] [2021-11-21 00:02:06,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087701553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:02:06,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:02:06,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:02:06,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311732971] [2021-11-21 00:02:06,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:02:06,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:02:06,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:06,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:02:06,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:02:06,108 INFO L87 Difference]: Start difference. First operand 41466 states and 53874 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 00:02:09,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:09,118 INFO L93 Difference]: Finished difference Result 90501 states and 116758 transitions. [2021-11-21 00:02:09,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:02:09,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2021-11-21 00:02:09,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:09,313 INFO L225 Difference]: With dead ends: 90501 [2021-11-21 00:02:09,313 INFO L226 Difference]: Without dead ends: 49041 [2021-11-21 00:02:09,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:02:09,384 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 478 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:09,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 501 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:02:09,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49041 states. [2021-11-21 00:02:12,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49041 to 43616. [2021-11-21 00:02:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43616 states, 32773 states have (on average 1.3043969120922712) internal successors, (42749), 32953 states have internal predecessors, (42749), 6586 states have call successors, (6586), 4257 states have call predecessors, (6586), 4256 states have return successors, (7023), 6406 states have call predecessors, (7023), 6583 states have call successors, (7023) [2021-11-21 00:02:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43616 states to 43616 states and 56358 transitions. [2021-11-21 00:02:12,543 INFO L78 Accepts]: Start accepts. Automaton has 43616 states and 56358 transitions. Word has length 69 [2021-11-21 00:02:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:12,544 INFO L470 AbstractCegarLoop]: Abstraction has 43616 states and 56358 transitions. [2021-11-21 00:02:12,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-21 00:02:12,544 INFO L276 IsEmpty]: Start isEmpty. Operand 43616 states and 56358 transitions. [2021-11-21 00:02:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 00:02:12,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:12,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:12,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 00:02:12,549 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:12,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:12,550 INFO L85 PathProgramCache]: Analyzing trace with hash -716216935, now seen corresponding path program 1 times [2021-11-21 00:02:12,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:12,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870230324] [2021-11-21 00:02:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:12,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:02:12,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:12,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870230324] [2021-11-21 00:02:12,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870230324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:02:12,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:02:12,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:02:12,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174279597] [2021-11-21 00:02:12,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:02:12,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:02:12,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:12,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:02:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:02:12,594 INFO L87 Difference]: Start difference. First operand 43616 states and 56358 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:02:15,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:15,813 INFO L93 Difference]: Finished difference Result 100989 states and 132006 transitions. [2021-11-21 00:02:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:02:15,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-11-21 00:02:15,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:16,008 INFO L225 Difference]: With dead ends: 100989 [2021-11-21 00:02:16,008 INFO L226 Difference]: Without dead ends: 58326 [2021-11-21 00:02:16,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:02:16,096 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 189 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:16,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 685 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:02:16,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58326 states. [2021-11-21 00:02:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58326 to 52721. [2021-11-21 00:02:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52721 states, 39454 states have (on average 1.2966492624321995) internal successors, (51158), 39823 states have internal predecessors, (51158), 8041 states have call successors, (8041), 5226 states have call predecessors, (8041), 5225 states have return successors, (8574), 7672 states have call predecessors, (8574), 8038 states have call successors, (8574) [2021-11-21 00:02:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52721 states to 52721 states and 67773 transitions. [2021-11-21 00:02:19,414 INFO L78 Accepts]: Start accepts. Automaton has 52721 states and 67773 transitions. Word has length 70 [2021-11-21 00:02:19,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:19,415 INFO L470 AbstractCegarLoop]: Abstraction has 52721 states and 67773 transitions. [2021-11-21 00:02:19,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:02:19,416 INFO L276 IsEmpty]: Start isEmpty. Operand 52721 states and 67773 transitions. [2021-11-21 00:02:19,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 00:02:19,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:19,421 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:19,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 00:02:19,421 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:19,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:19,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1786998237, now seen corresponding path program 1 times [2021-11-21 00:02:19,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:19,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164147239] [2021-11-21 00:02:19,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:19,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:02:19,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:19,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164147239] [2021-11-21 00:02:19,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164147239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:02:19,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:02:19,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 00:02:19,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853605674] [2021-11-21 00:02:19,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:02:19,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:02:19,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:19,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:02:19,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:02:19,461 INFO L87 Difference]: Start difference. First operand 52721 states and 67773 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 00:02:23,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:23,030 INFO L93 Difference]: Finished difference Result 115886 states and 148338 transitions. [2021-11-21 00:02:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:02:23,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 72 [2021-11-21 00:02:23,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:23,202 INFO L225 Difference]: With dead ends: 115886 [2021-11-21 00:02:23,202 INFO L226 Difference]: Without dead ends: 63171 [2021-11-21 00:02:23,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:02:23,273 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 521 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:23,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 505 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:02:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63171 states. [2021-11-21 00:02:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63171 to 54607. [2021-11-21 00:02:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54607 states, 40973 states have (on average 1.2918019183364655) internal successors, (52929), 41318 states have internal predecessors, (52929), 8187 states have call successors, (8187), 5447 states have call predecessors, (8187), 5446 states have return successors, (8720), 7842 states have call predecessors, (8720), 8184 states have call successors, (8720) [2021-11-21 00:02:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54607 states to 54607 states and 69836 transitions. [2021-11-21 00:02:26,814 INFO L78 Accepts]: Start accepts. Automaton has 54607 states and 69836 transitions. Word has length 72 [2021-11-21 00:02:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:26,815 INFO L470 AbstractCegarLoop]: Abstraction has 54607 states and 69836 transitions. [2021-11-21 00:02:26,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 00:02:26,815 INFO L276 IsEmpty]: Start isEmpty. Operand 54607 states and 69836 transitions. [2021-11-21 00:02:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-21 00:02:26,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:26,821 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:26,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:02:26,821 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:26,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:26,821 INFO L85 PathProgramCache]: Analyzing trace with hash -602360157, now seen corresponding path program 1 times [2021-11-21 00:02:26,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:26,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327759907] [2021-11-21 00:02:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:26,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:02:26,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:26,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327759907] [2021-11-21 00:02:26,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327759907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:02:26,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:02:26,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:02:26,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105507492] [2021-11-21 00:02:26,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:02:26,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:02:26,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:26,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:02:26,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:02:26,858 INFO L87 Difference]: Start difference. First operand 54607 states and 69836 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9)