./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8 --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 44c406d67793fa594ef7527f23acdb47ae14bddc8229fabdd71855d9e982ff07 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:13:44,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:13:44,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:13:44,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:13:44,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:13:44,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:13:44,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:13:44,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:13:44,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:13:44,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:13:44,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:13:44,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:13:44,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:13:44,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:13:44,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:13:44,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:13:44,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:13:44,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:13:44,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:13:44,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:13:44,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:13:44,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:13:44,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:13:44,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:13:44,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:13:44,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:13:44,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:13:44,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:13:44,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:13:44,378 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:13:44,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:13:44,381 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:13:44,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:13:44,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:13:44,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:13:44,388 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:13:44,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:13:44,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:13:44,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:13:44,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:13:44,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:13:44,393 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:13:44,446 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:13:44,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:13:44,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:13:44,450 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:13:44,450 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:13:44,450 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:13:44,451 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:13:44,451 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:13:44,451 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:13:44,452 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:13:44,453 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:13:44,453 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:13:44,454 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:13:44,454 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:13:44,454 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:13:44,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:13:44,456 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:13:44,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:13:44,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:13:44,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:13:44,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:13:44,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:13:44,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:13:44,458 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:13:44,458 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:13:44,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:13:44,459 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:13:44,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:13:44,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:13:44,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:13:44,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:13:44,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:13:44,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:13:44,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:13:44,462 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:13:44,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:13:44,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:13:44,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:13:44,463 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:13:44,463 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_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44c406d67793fa594ef7527f23acdb47ae14bddc8229fabdd71855d9e982ff07 [2021-11-07 02:13:44,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:13:44,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:13:44,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:13:44,873 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:13:44,874 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:13:44,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-07 02:13:44,954 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/data/2ee410402/9c8c699466cc462b82348f4caf182fb6/FLAG839291983 [2021-11-07 02:13:45,786 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:13:45,787 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-07 02:13:45,816 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/data/2ee410402/9c8c699466cc462b82348f4caf182fb6/FLAG839291983 [2021-11-07 02:13:45,881 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/data/2ee410402/9c8c699466cc462b82348f4caf182fb6 [2021-11-07 02:13:45,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:13:45,886 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:13:45,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:45,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:13:45,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:13:45,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:45" (1/1) ... [2021-11-07 02:13:45,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b1f835f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:45, skipping insertion in model container [2021-11-07 02:13:45,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:45" (1/1) ... [2021-11-07 02:13:45,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:13:46,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:13:46,897 WARN L228 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_c3659064-1cef-4b87-9f5e-5047bcffa4bc/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[35223,35236] [2021-11-07 02:13:47,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:47,158 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:13:47,635 WARN L228 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_c3659064-1cef-4b87-9f5e-5047bcffa4bc/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[35223,35236] [2021-11-07 02:13:47,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:47,868 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:13:47,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:47 WrapperNode [2021-11-07 02:13:47,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:47,870 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:13:47,870 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:13:47,871 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:13:47,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:47" (1/1) ... [2021-11-07 02:13:47,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:47" (1/1) ... [2021-11-07 02:13:48,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:13:48,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:13:48,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:13:48,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:13:48,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:47" (1/1) ... [2021-11-07 02:13:48,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:47" (1/1) ... [2021-11-07 02:13:48,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:47" (1/1) ... [2021-11-07 02:13:48,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:47" (1/1) ... [2021-11-07 02:13:48,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:47" (1/1) ... [2021-11-07 02:13:48,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:47" (1/1) ... [2021-11-07 02:13:48,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:47" (1/1) ... [2021-11-07 02:13:48,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:13:48,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:13:48,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:13:48,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:13:48,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:47" (1/1) ... [2021-11-07 02:13:48,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:13:48,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:13:48,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:13:48,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3659064-1cef-4b87-9f5e-5047bcffa4bc/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:13:48,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:13:48,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:13:48,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:13:48,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:13:53,305 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:13:53,305 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 02:13:53,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:13:53 BoogieIcfgContainer [2021-11-07 02:13:53,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:13:53,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:13:53,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:13:53,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:13:53,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:13:45" (1/3) ... [2021-11-07 02:13:53,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2327626d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:13:53, skipping insertion in model container [2021-11-07 02:13:53,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:47" (2/3) ... [2021-11-07 02:13:53,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2327626d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:13:53, skipping insertion in model container [2021-11-07 02:13:53,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:13:53" (3/3) ... [2021-11-07 02:13:53,325 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-07 02:13:53,332 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:13:53,333 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:13:53,408 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:13:53,418 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 [2021-11-07 02:13:53,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:13:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand has 630 states, 628 states have (on average 1.7277070063694266) internal successors, (1085), 629 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-07 02:13:53,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:53,525 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:53,526 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:53,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:53,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1087873451, now seen corresponding path program 1 times [2021-11-07 02:13:53,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:13:53,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061302061] [2021-11-07 02:13:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:53,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:13:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:55,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:13:55,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061302061] [2021-11-07 02:13:55,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061302061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:55,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:55,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:13:55,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560938075] [2021-11-07 02:13:55,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:13:55,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:13:55,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:13:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:13:55,517 INFO L87 Difference]: Start difference. First operand has 630 states, 628 states have (on average 1.7277070063694266) internal successors, (1085), 629 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:55,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:55,865 INFO L93 Difference]: Finished difference Result 1854 states and 3196 transitions. [2021-11-07 02:13:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:13:55,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-11-07 02:13:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:55,898 INFO L225 Difference]: With dead ends: 1854 [2021-11-07 02:13:55,898 INFO L226 Difference]: Without dead ends: 1229 [2021-11-07 02:13:55,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:13:55,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-11-07 02:13:56,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1227. [2021-11-07 02:13:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 1.4477977161500815) internal successors, (1775), 1226 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:56,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1775 transitions. [2021-11-07 02:13:56,086 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1775 transitions. Word has length 263 [2021-11-07 02:13:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:56,089 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 1775 transitions. [2021-11-07 02:13:56,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1775 transitions. [2021-11-07 02:13:56,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-07 02:13:56,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:56,098 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:56,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:13:56,099 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:56,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash 148266175, now seen corresponding path program 1 times [2021-11-07 02:13:56,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:13:56,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856591337] [2021-11-07 02:13:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:56,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:13:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:56,363 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:13:56,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856591337] [2021-11-07 02:13:56,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856591337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:56,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:56,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:13:56,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731931780] [2021-11-07 02:13:56,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:13:56,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:13:56,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:13:56,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:13:56,369 INFO L87 Difference]: Start difference. First operand 1227 states and 1775 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:56,603 INFO L93 Difference]: Finished difference Result 3512 states and 5059 transitions. [2021-11-07 02:13:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:13:56,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-11-07 02:13:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:56,627 INFO L225 Difference]: With dead ends: 3512 [2021-11-07 02:13:56,628 INFO L226 Difference]: Without dead ends: 2406 [2021-11-07 02:13:56,632 INFO L786 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 [2021-11-07 02:13:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-11-07 02:13:56,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2404. [2021-11-07 02:13:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 2403 states have (on average 1.4411152725759466) internal successors, (3463), 2403 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 3463 transitions. [2021-11-07 02:13:56,808 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 3463 transitions. Word has length 265 [2021-11-07 02:13:56,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:56,811 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 3463 transitions. [2021-11-07 02:13:56,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 3463 transitions. [2021-11-07 02:13:56,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-07 02:13:56,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:56,823 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:56,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 02:13:56,824 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:56,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:56,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1745834533, now seen corresponding path program 1 times [2021-11-07 02:13:56,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:13:56,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274891469] [2021-11-07 02:13:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:56,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:13:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:56,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:13:56,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274891469] [2021-11-07 02:13:56,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274891469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:56,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:57,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:13:57,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587750556] [2021-11-07 02:13:57,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:13:57,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:13:57,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:13:57,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:13:57,009 INFO L87 Difference]: Start difference. First operand 2404 states and 3463 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:57,303 INFO L93 Difference]: Finished difference Result 7060 states and 10156 transitions. [2021-11-07 02:13:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:13:57,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 265 [2021-11-07 02:13:57,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:57,338 INFO L225 Difference]: With dead ends: 7060 [2021-11-07 02:13:57,339 INFO L226 Difference]: Without dead ends: 4788 [2021-11-07 02:13:57,344 INFO L786 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 [2021-11-07 02:13:57,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2021-11-07 02:13:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 2407. [2021-11-07 02:13:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 2406 states have (on average 1.4405652535328346) internal successors, (3466), 2406 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3466 transitions. [2021-11-07 02:13:57,556 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3466 transitions. Word has length 265 [2021-11-07 02:13:57,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:57,556 INFO L470 AbstractCegarLoop]: Abstraction has 2407 states and 3466 transitions. [2021-11-07 02:13:57,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:57,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3466 transitions. [2021-11-07 02:13:57,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-07 02:13:57,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:57,566 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:57,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 02:13:57,566 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:57,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:57,567 INFO L85 PathProgramCache]: Analyzing trace with hash -299658672, now seen corresponding path program 1 times [2021-11-07 02:13:57,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:13:57,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174383934] [2021-11-07 02:13:57,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:57,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:13:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:57,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:13:57,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174383934] [2021-11-07 02:13:57,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174383934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:57,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:57,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:13:57,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010363485] [2021-11-07 02:13:57,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:13:57,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:13:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:13:57,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:13:57,713 INFO L87 Difference]: Start difference. First operand 2407 states and 3466 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:58,017 INFO L93 Difference]: Finished difference Result 5109 states and 7482 transitions. [2021-11-07 02:13:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:13:58,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2021-11-07 02:13:58,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:58,040 INFO L225 Difference]: With dead ends: 5109 [2021-11-07 02:13:58,040 INFO L226 Difference]: Without dead ends: 3393 [2021-11-07 02:13:58,044 INFO L786 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 [2021-11-07 02:13:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2021-11-07 02:13:58,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 2787. [2021-11-07 02:13:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 1.4623115577889447) internal successors, (4074), 2786 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4074 transitions. [2021-11-07 02:13:58,277 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4074 transitions. Word has length 266 [2021-11-07 02:13:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:58,278 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 4074 transitions. [2021-11-07 02:13:58,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4074 transitions. [2021-11-07 02:13:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-07 02:13:58,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:58,288 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:58,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 02:13:58,289 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash -69839574, now seen corresponding path program 1 times [2021-11-07 02:13:58,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:13:58,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476822565] [2021-11-07 02:13:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:58,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:13:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:58,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:13:58,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476822565] [2021-11-07 02:13:58,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476822565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:58,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:58,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:13:58,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560562796] [2021-11-07 02:13:58,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:13:58,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:13:58,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:13:58,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:13:58,808 INFO L87 Difference]: Start difference. First operand 2787 states and 4074 transitions. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:59,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:59,318 INFO L93 Difference]: Finished difference Result 8111 states and 11845 transitions. [2021-11-07 02:13:59,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:13:59,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2021-11-07 02:13:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:59,354 INFO L225 Difference]: With dead ends: 8111 [2021-11-07 02:13:59,355 INFO L226 Difference]: Without dead ends: 5339 [2021-11-07 02:13:59,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:13:59,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2021-11-07 02:13:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 5337. [2021-11-07 02:13:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5337 states, 5336 states have (on average 1.4522113943028485) internal successors, (7749), 5336 states have internal predecessors, (7749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 7749 transitions. [2021-11-07 02:13:59,855 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 7749 transitions. Word has length 266 [2021-11-07 02:13:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:59,856 INFO L470 AbstractCegarLoop]: Abstraction has 5337 states and 7749 transitions. [2021-11-07 02:13:59,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 7749 transitions. [2021-11-07 02:13:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-07 02:13:59,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:59,870 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:59,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 02:13:59,870 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:59,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:59,871 INFO L85 PathProgramCache]: Analyzing trace with hash 219834257, now seen corresponding path program 1 times [2021-11-07 02:13:59,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:13:59,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115770014] [2021-11-07 02:13:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:59,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:14:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:00,425 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:14:00,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115770014] [2021-11-07 02:14:00,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115770014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:00,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:00,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:14:00,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024246607] [2021-11-07 02:14:00,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:00,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:14:00,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:00,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:00,432 INFO L87 Difference]: Start difference. First operand 5337 states and 7749 transitions. Second operand has 4 states, 4 states have (on average 66.75) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:01,340 INFO L93 Difference]: Finished difference Result 15462 states and 22399 transitions. [2021-11-07 02:14:01,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:01,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-11-07 02:14:01,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:01,421 INFO L225 Difference]: With dead ends: 15462 [2021-11-07 02:14:01,422 INFO L226 Difference]: Without dead ends: 10263 [2021-11-07 02:14:01,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:14:01,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10263 states. [2021-11-07 02:14:02,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10263 to 10261. [2021-11-07 02:14:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10261 states, 10260 states have (on average 1.4405458089668617) internal successors, (14780), 10260 states have internal predecessors, (14780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10261 states to 10261 states and 14780 transitions. [2021-11-07 02:14:02,381 INFO L78 Accepts]: Start accepts. Automaton has 10261 states and 14780 transitions. Word has length 267 [2021-11-07 02:14:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:02,382 INFO L470 AbstractCegarLoop]: Abstraction has 10261 states and 14780 transitions. [2021-11-07 02:14:02,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.75) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 10261 states and 14780 transitions. [2021-11-07 02:14:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-07 02:14:02,417 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:02,417 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:02,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 02:14:02,418 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:02,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:02,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1808654190, now seen corresponding path program 1 times [2021-11-07 02:14:02,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:14:02,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144515644] [2021-11-07 02:14:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:02,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:14:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:02,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:14:02,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144515644] [2021-11-07 02:14:02,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144515644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:02,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:02,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:14:02,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118472607] [2021-11-07 02:14:02,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:02,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:14:02,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:02,918 INFO L87 Difference]: Start difference. First operand 10261 states and 14780 transitions. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:04,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:04,407 INFO L93 Difference]: Finished difference Result 30109 states and 43291 transitions. [2021-11-07 02:14:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:04,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-11-07 02:14:04,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:04,464 INFO L225 Difference]: With dead ends: 30109 [2021-11-07 02:14:04,464 INFO L226 Difference]: Without dead ends: 19990 [2021-11-07 02:14:04,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:14:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19990 states. [2021-11-07 02:14:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19990 to 19988. [2021-11-07 02:14:06,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19988 states, 19987 states have (on average 1.4295291939760844) internal successors, (28572), 19987 states have internal predecessors, (28572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:06,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19988 states to 19988 states and 28572 transitions. [2021-11-07 02:14:06,176 INFO L78 Accepts]: Start accepts. Automaton has 19988 states and 28572 transitions. Word has length 269 [2021-11-07 02:14:06,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:06,177 INFO L470 AbstractCegarLoop]: Abstraction has 19988 states and 28572 transitions. [2021-11-07 02:14:06,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 19988 states and 28572 transitions. [2021-11-07 02:14:06,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-07 02:14:06,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:06,229 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:06,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 02:14:06,230 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:06,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1071167537, now seen corresponding path program 1 times [2021-11-07 02:14:06,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:14:06,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750876149] [2021-11-07 02:14:06,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:06,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:14:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:06,382 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:14:06,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750876149] [2021-11-07 02:14:06,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750876149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:06,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:06,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:14:06,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455584987] [2021-11-07 02:14:06,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:06,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:14:06,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:06,386 INFO L87 Difference]: Start difference. First operand 19988 states and 28572 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:09,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:09,020 INFO L93 Difference]: Finished difference Result 57491 states and 81885 transitions. [2021-11-07 02:14:09,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:09,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2021-11-07 02:14:09,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:09,140 INFO L225 Difference]: With dead ends: 57491 [2021-11-07 02:14:09,140 INFO L226 Difference]: Without dead ends: 39065 [2021-11-07 02:14:09,173 INFO L786 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 [2021-11-07 02:14:09,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39065 states. [2021-11-07 02:14:11,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39065 to 39063. [2021-11-07 02:14:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39063 states, 39062 states have (on average 1.4212021913880497) internal successors, (55515), 39062 states have internal predecessors, (55515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39063 states to 39063 states and 55515 transitions. [2021-11-07 02:14:11,666 INFO L78 Accepts]: Start accepts. Automaton has 39063 states and 55515 transitions. Word has length 271 [2021-11-07 02:14:11,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:11,666 INFO L470 AbstractCegarLoop]: Abstraction has 39063 states and 55515 transitions. [2021-11-07 02:14:11,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 39063 states and 55515 transitions. [2021-11-07 02:14:11,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-07 02:14:11,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:11,771 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:11,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 02:14:11,772 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:11,773 INFO L85 PathProgramCache]: Analyzing trace with hash -18380819, now seen corresponding path program 1 times [2021-11-07 02:14:11,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:14:11,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516027305] [2021-11-07 02:14:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:11,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:14:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:11,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:14:11,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516027305] [2021-11-07 02:14:11,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516027305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:11,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:11,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:14:11,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073995789] [2021-11-07 02:14:11,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:11,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:14:11,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:11,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:11,901 INFO L87 Difference]: Start difference. First operand 39063 states and 55515 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:15,335 INFO L93 Difference]: Finished difference Result 115254 states and 163663 transitions. [2021-11-07 02:14:15,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:14:15,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2021-11-07 02:14:15,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:15,513 INFO L225 Difference]: With dead ends: 115254 [2021-11-07 02:14:15,513 INFO L226 Difference]: Without dead ends: 77877 [2021-11-07 02:14:15,575 INFO L786 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 [2021-11-07 02:14:15,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77877 states. [2021-11-07 02:14:18,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77877 to 39096. [2021-11-07 02:14:18,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39096 states, 39095 states have (on average 1.4208466555825554) internal successors, (55548), 39095 states have internal predecessors, (55548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39096 states to 39096 states and 55548 transitions. [2021-11-07 02:14:18,485 INFO L78 Accepts]: Start accepts. Automaton has 39096 states and 55548 transitions. Word has length 271 [2021-11-07 02:14:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:18,485 INFO L470 AbstractCegarLoop]: Abstraction has 39096 states and 55548 transitions. [2021-11-07 02:14:18,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 39096 states and 55548 transitions. [2021-11-07 02:14:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-07 02:14:18,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:18,536 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:18,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 02:14:18,537 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:18,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1083911540, now seen corresponding path program 1 times [2021-11-07 02:14:18,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:14:18,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274916804] [2021-11-07 02:14:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:18,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:14:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:18,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:18,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:14:18,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274916804] [2021-11-07 02:14:18,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274916804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:18,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:18,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:14:18,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14903646] [2021-11-07 02:14:18,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:14:18,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:14:18,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:14:18,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:14:19,000 INFO L87 Difference]: Start difference. First operand 39096 states and 55548 transitions. Second operand has 5 states, 5 states have (on average 54.4) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:23,405 INFO L93 Difference]: Finished difference Result 113787 states and 161283 transitions. [2021-11-07 02:14:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:23,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 54.4) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2021-11-07 02:14:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:23,548 INFO L225 Difference]: With dead ends: 113787 [2021-11-07 02:14:23,549 INFO L226 Difference]: Without dead ends: 74891 [2021-11-07 02:14:23,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:14:23,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74891 states. [2021-11-07 02:14:28,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74891 to 74889. [2021-11-07 02:14:28,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74889 states, 74888 states have (on average 1.4103060570451875) internal successors, (105615), 74888 states have internal predecessors, (105615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74889 states to 74889 states and 105615 transitions. [2021-11-07 02:14:28,687 INFO L78 Accepts]: Start accepts. Automaton has 74889 states and 105615 transitions. Word has length 272 [2021-11-07 02:14:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:28,687 INFO L470 AbstractCegarLoop]: Abstraction has 74889 states and 105615 transitions. [2021-11-07 02:14:28,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.4) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:28,688 INFO L276 IsEmpty]: Start isEmpty. Operand 74889 states and 105615 transitions. [2021-11-07 02:14:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-07 02:14:28,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:28,795 INFO L513 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:28,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 02:14:28,795 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:28,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:28,796 INFO L85 PathProgramCache]: Analyzing trace with hash 145083143, now seen corresponding path program 1 times [2021-11-07 02:14:28,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:14:28,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278902975] [2021-11-07 02:14:28,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:28,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:14:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:29,250 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:14:29,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278902975] [2021-11-07 02:14:29,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278902975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:29,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:29,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:14:29,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832739777] [2021-11-07 02:14:29,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:29,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:14:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:29,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:29,254 INFO L87 Difference]: Start difference. First operand 74889 states and 105615 transitions. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:37,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:37,438 INFO L93 Difference]: Finished difference Result 218779 states and 307759 transitions. [2021-11-07 02:14:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:37,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2021-11-07 02:14:37,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:37,812 INFO L225 Difference]: With dead ends: 218779 [2021-11-07 02:14:37,813 INFO L226 Difference]: Without dead ends: 146154 [2021-11-07 02:14:37,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:14:38,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146154 states.