./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH --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 992eccb3e17c03b79bbfcd5b581118b39f3d8c6120d28ea0a469a0cfaace3f55 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:08:29,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:08:29,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:08:29,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:08:29,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:08:29,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:08:29,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:08:29,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:08:29,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:08:29,876 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:08:29,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:08:29,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:08:29,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:08:29,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:08:29,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:08:29,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:08:29,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:08:29,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:08:29,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:08:29,892 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:08:29,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:08:29,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:08:29,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:08:29,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:08:29,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:08:29,903 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:08:29,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:08:29,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:08:29,911 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:08:29,912 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:08:29,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:08:29,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:08:29,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:08:29,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:08:29,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:08:29,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:08:29,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:08:29,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:08:29,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:08:29,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:08:29,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:08:29,926 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:08:29,975 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:08:29,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:08:29,977 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:08:29,977 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:08:29,977 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:08:29,977 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:08:29,978 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:08:29,978 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:08:29,984 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:08:29,985 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:08:29,986 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:08:29,986 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:08:29,986 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:08:29,986 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:08:29,986 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:08:29,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:08:29,987 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:08:29,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:08:29,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:08:29,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:08:29,988 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:08:29,988 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:08:29,988 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:08:29,989 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:08:29,989 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:08:29,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:08:29,989 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:08:29,989 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:08:29,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:08:29,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:08:29,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:08:29,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:08:29,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:08:29,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:08:29,992 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:08:29,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:08:29,993 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:08:29,993 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:08:29,993 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:08:29,993 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_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 992eccb3e17c03b79bbfcd5b581118b39f3d8c6120d28ea0a469a0cfaace3f55 [2021-11-03 05:08:30,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:08:30,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:08:30,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:08:30,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:08:30,273 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:08:30,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-03 05:08:30,362 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/data/f204bf91a/192c8b20a92746969fbce520f37a130d/FLAG8a70a1cb5 [2021-11-03 05:08:31,020 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:08:31,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-03 05:08:31,056 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/data/f204bf91a/192c8b20a92746969fbce520f37a130d/FLAG8a70a1cb5 [2021-11-03 05:08:31,196 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/data/f204bf91a/192c8b20a92746969fbce520f37a130d [2021-11-03 05:08:31,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:08:31,203 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:08:31,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:08:31,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:08:31,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:08:31,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:08:31" (1/1) ... [2021-11-03 05:08:31,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b12cc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:31, skipping insertion in model container [2021-11-03 05:08:31,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:08:31" (1/1) ... [2021-11-03 05:08:31,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:08:31,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:08:32,081 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_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[35225,35238] [2021-11-03 05:08:32,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:08:32,321 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:08:32,655 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_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[35225,35238] [2021-11-03 05:08:32,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:08:32,871 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:08:32,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:32 WrapperNode [2021-11-03 05:08:32,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:08:32,873 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:08:32,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:08:32,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:08:32,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:32" (1/1) ... [2021-11-03 05:08:32,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:32" (1/1) ... [2021-11-03 05:08:33,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:08:33,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:08:33,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:08:33,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:08:33,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:32" (1/1) ... [2021-11-03 05:08:33,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:32" (1/1) ... [2021-11-03 05:08:33,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:32" (1/1) ... [2021-11-03 05:08:33,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:32" (1/1) ... [2021-11-03 05:08:33,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:32" (1/1) ... [2021-11-03 05:08:33,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:32" (1/1) ... [2021-11-03 05:08:33,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:32" (1/1) ... [2021-11-03 05:08:33,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:08:33,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:08:33,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:08:33,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:08:33,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:32" (1/1) ... [2021-11-03 05:08:33,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:08:33,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:08:33,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:08:33,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_850e46f0-37cc-45cc-bb16-b1c1ec60b03f/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:08:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:08:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:08:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:08:33,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:08:37,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:08:37,531 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 05:08:37,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:08:37 BoogieIcfgContainer [2021-11-03 05:08:37,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:08:37,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:08:37,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:08:37,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:08:37,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:08:31" (1/3) ... [2021-11-03 05:08:37,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7218adff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:08:37, skipping insertion in model container [2021-11-03 05:08:37,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:08:32" (2/3) ... [2021-11-03 05:08:37,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7218adff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:08:37, skipping insertion in model container [2021-11-03 05:08:37,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:08:37" (3/3) ... [2021-11-03 05:08:37,545 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-03 05:08:37,555 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:08:37,555 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:08:37,646 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:08:37,656 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 [2021-11-03 05:08:37,657 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:08:37,695 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) [2021-11-03 05:08:37,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-03 05:08:37,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:37,735 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] [2021-11-03 05:08:37,736 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:37,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:37,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1087873451, now seen corresponding path program 1 times [2021-11-03 05:08:37,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:37,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426216566] [2021-11-03 05:08:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:37,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:39,142 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:39,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426216566] [2021-11-03 05:08:39,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426216566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:39,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:39,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:08:39,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28874115] [2021-11-03 05:08:39,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:08:39,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:39,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:08:39,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:08:39,214 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) [2021-11-03 05:08:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:39,445 INFO L93 Difference]: Finished difference Result 1854 states and 3196 transitions. [2021-11-03 05:08:39,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:08:39,448 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 [2021-11-03 05:08:39,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:39,469 INFO L225 Difference]: With dead ends: 1854 [2021-11-03 05:08:39,469 INFO L226 Difference]: Without dead ends: 1229 [2021-11-03 05:08:39,475 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 [2021-11-03 05:08:39,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-11-03 05:08:39,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1227. [2021-11-03 05:08:39,585 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) [2021-11-03 05:08:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1775 transitions. [2021-11-03 05:08:39,591 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1775 transitions. Word has length 263 [2021-11-03 05:08:39,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:39,592 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 1775 transitions. [2021-11-03 05:08:39,593 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) [2021-11-03 05:08:39,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1775 transitions. [2021-11-03 05:08:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-03 05:08:39,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:39,599 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] [2021-11-03 05:08:39,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:08:39,600 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:39,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:39,601 INFO L85 PathProgramCache]: Analyzing trace with hash 148266175, now seen corresponding path program 1 times [2021-11-03 05:08:39,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:39,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083847900] [2021-11-03 05:08:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:39,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:39,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:39,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083847900] [2021-11-03 05:08:39,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083847900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:39,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:39,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:08:39,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729148492] [2021-11-03 05:08:39,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:08:39,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:39,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:08:39,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:08:39,758 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) [2021-11-03 05:08:39,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:39,910 INFO L93 Difference]: Finished difference Result 3512 states and 5059 transitions. [2021-11-03 05:08:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:08:39,911 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 [2021-11-03 05:08:39,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:39,925 INFO L225 Difference]: With dead ends: 3512 [2021-11-03 05:08:39,926 INFO L226 Difference]: Without dead ends: 2406 [2021-11-03 05:08:39,929 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 [2021-11-03 05:08:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-11-03 05:08:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2404. [2021-11-03 05:08:40,088 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) [2021-11-03 05:08:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 3463 transitions. [2021-11-03 05:08:40,098 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 3463 transitions. Word has length 265 [2021-11-03 05:08:40,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:40,099 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 3463 transitions. [2021-11-03 05:08:40,099 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) [2021-11-03 05:08:40,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 3463 transitions. [2021-11-03 05:08:40,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-03 05:08:40,107 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:40,108 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] [2021-11-03 05:08:40,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:08:40,108 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:40,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1745834533, now seen corresponding path program 1 times [2021-11-03 05:08:40,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:40,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373187676] [2021-11-03 05:08:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:40,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:40,204 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:40,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373187676] [2021-11-03 05:08:40,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373187676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:40,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:40,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:08:40,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286283920] [2021-11-03 05:08:40,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:08:40,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:40,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:08:40,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:08:40,208 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) [2021-11-03 05:08:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:40,449 INFO L93 Difference]: Finished difference Result 7060 states and 10156 transitions. [2021-11-03 05:08:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:08:40,449 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 [2021-11-03 05:08:40,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:40,476 INFO L225 Difference]: With dead ends: 7060 [2021-11-03 05:08:40,477 INFO L226 Difference]: Without dead ends: 4788 [2021-11-03 05:08:40,481 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 [2021-11-03 05:08:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2021-11-03 05:08:40,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 2407. [2021-11-03 05:08:40,709 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) [2021-11-03 05:08:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3466 transitions. [2021-11-03 05:08:40,718 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3466 transitions. Word has length 265 [2021-11-03 05:08:40,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:40,719 INFO L470 AbstractCegarLoop]: Abstraction has 2407 states and 3466 transitions. [2021-11-03 05:08:40,719 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) [2021-11-03 05:08:40,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3466 transitions. [2021-11-03 05:08:40,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-03 05:08:40,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:40,728 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] [2021-11-03 05:08:40,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:08:40,728 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:40,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash -299658672, now seen corresponding path program 1 times [2021-11-03 05:08:40,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:40,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016477857] [2021-11-03 05:08:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:40,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:40,832 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:40,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016477857] [2021-11-03 05:08:40,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016477857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:40,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:40,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:08:40,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161470363] [2021-11-03 05:08:40,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:08:40,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:08:40,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:08:40,836 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) [2021-11-03 05:08:41,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:41,110 INFO L93 Difference]: Finished difference Result 5109 states and 7482 transitions. [2021-11-03 05:08:41,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:08:41,111 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 [2021-11-03 05:08:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:41,131 INFO L225 Difference]: With dead ends: 5109 [2021-11-03 05:08:41,131 INFO L226 Difference]: Without dead ends: 3393 [2021-11-03 05:08:41,136 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 [2021-11-03 05:08:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3393 states. [2021-11-03 05:08:41,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3393 to 2787. [2021-11-03 05:08:41,387 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) [2021-11-03 05:08:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4074 transitions. [2021-11-03 05:08:41,401 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4074 transitions. Word has length 266 [2021-11-03 05:08:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:41,402 INFO L470 AbstractCegarLoop]: Abstraction has 2787 states and 4074 transitions. [2021-11-03 05:08:41,402 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) [2021-11-03 05:08:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4074 transitions. [2021-11-03 05:08:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-03 05:08:41,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:41,412 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] [2021-11-03 05:08:41,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:08:41,413 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:41,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:41,414 INFO L85 PathProgramCache]: Analyzing trace with hash -69839574, now seen corresponding path program 1 times [2021-11-03 05:08:41,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:41,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349371522] [2021-11-03 05:08:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:41,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:42,003 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:42,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349371522] [2021-11-03 05:08:42,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349371522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:42,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:42,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:08:42,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524468056] [2021-11-03 05:08:42,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:08:42,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:42,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:08:42,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:08:42,007 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) [2021-11-03 05:08:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:42,508 INFO L93 Difference]: Finished difference Result 8111 states and 11845 transitions. [2021-11-03 05:08:42,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:08:42,509 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 [2021-11-03 05:08:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:42,541 INFO L225 Difference]: With dead ends: 8111 [2021-11-03 05:08:42,541 INFO L226 Difference]: Without dead ends: 5339 [2021-11-03 05:08:42,547 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 [2021-11-03 05:08:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2021-11-03 05:08:42,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 5337. [2021-11-03 05:08:43,005 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) [2021-11-03 05:08:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5337 states to 5337 states and 7749 transitions. [2021-11-03 05:08:43,026 INFO L78 Accepts]: Start accepts. Automaton has 5337 states and 7749 transitions. Word has length 266 [2021-11-03 05:08:43,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:43,027 INFO L470 AbstractCegarLoop]: Abstraction has 5337 states and 7749 transitions. [2021-11-03 05:08:43,027 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) [2021-11-03 05:08:43,028 INFO L276 IsEmpty]: Start isEmpty. Operand 5337 states and 7749 transitions. [2021-11-03 05:08:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-03 05:08:43,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:43,041 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] [2021-11-03 05:08:43,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:08:43,042 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:43,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:43,042 INFO L85 PathProgramCache]: Analyzing trace with hash 219834257, now seen corresponding path program 1 times [2021-11-03 05:08:43,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:43,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251248876] [2021-11-03 05:08:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:43,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:43,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:43,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251248876] [2021-11-03 05:08:43,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251248876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:43,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:43,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:08:43,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370057085] [2021-11-03 05:08:43,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:08:43,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:43,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:08:43,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:08:43,540 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) [2021-11-03 05:08:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:44,399 INFO L93 Difference]: Finished difference Result 15462 states and 22399 transitions. [2021-11-03 05:08:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:08:44,400 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 [2021-11-03 05:08:44,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:44,473 INFO L225 Difference]: With dead ends: 15462 [2021-11-03 05:08:44,474 INFO L226 Difference]: Without dead ends: 10263 [2021-11-03 05:08:44,534 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 [2021-11-03 05:08:44,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10263 states. [2021-11-03 05:08:45,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10263 to 10261. [2021-11-03 05:08:45,431 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) [2021-11-03 05:08:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10261 states to 10261 states and 14780 transitions. [2021-11-03 05:08:45,483 INFO L78 Accepts]: Start accepts. Automaton has 10261 states and 14780 transitions. Word has length 267 [2021-11-03 05:08:45,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:45,483 INFO L470 AbstractCegarLoop]: Abstraction has 10261 states and 14780 transitions. [2021-11-03 05:08:45,484 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) [2021-11-03 05:08:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10261 states and 14780 transitions. [2021-11-03 05:08:45,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-03 05:08:45,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:45,509 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] [2021-11-03 05:08:45,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:08:45,510 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:45,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:45,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1808654190, now seen corresponding path program 1 times [2021-11-03 05:08:45,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:45,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761464324] [2021-11-03 05:08:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:45,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:45,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:45,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761464324] [2021-11-03 05:08:45,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761464324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:45,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:45,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:08:45,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409970932] [2021-11-03 05:08:45,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:08:45,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:45,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:08:45,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:08:45,948 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) [2021-11-03 05:08:47,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:47,351 INFO L93 Difference]: Finished difference Result 30109 states and 43291 transitions. [2021-11-03 05:08:47,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:08:47,351 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 [2021-11-03 05:08:47,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:47,401 INFO L225 Difference]: With dead ends: 30109 [2021-11-03 05:08:47,401 INFO L226 Difference]: Without dead ends: 19990 [2021-11-03 05:08:47,419 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 [2021-11-03 05:08:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19990 states. [2021-11-03 05:08:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19990 to 19988. [2021-11-03 05:08:48,928 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) [2021-11-03 05:08:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19988 states to 19988 states and 28572 transitions. [2021-11-03 05:08:48,974 INFO L78 Accepts]: Start accepts. Automaton has 19988 states and 28572 transitions. Word has length 269 [2021-11-03 05:08:48,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:48,974 INFO L470 AbstractCegarLoop]: Abstraction has 19988 states and 28572 transitions. [2021-11-03 05:08:48,975 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) [2021-11-03 05:08:48,975 INFO L276 IsEmpty]: Start isEmpty. Operand 19988 states and 28572 transitions. [2021-11-03 05:08:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-03 05:08:49,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:49,012 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] [2021-11-03 05:08:49,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:08:49,012 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:49,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1071167537, now seen corresponding path program 1 times [2021-11-03 05:08:49,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:49,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077347949] [2021-11-03 05:08:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:49,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:49,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:49,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077347949] [2021-11-03 05:08:49,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077347949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:49,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:49,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:08:49,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259806991] [2021-11-03 05:08:49,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:08:49,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:49,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:08:49,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:08:49,120 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) [2021-11-03 05:08:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:50,996 INFO L93 Difference]: Finished difference Result 57491 states and 81885 transitions. [2021-11-03 05:08:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:08:50,997 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 [2021-11-03 05:08:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:51,106 INFO L225 Difference]: With dead ends: 57491 [2021-11-03 05:08:51,106 INFO L226 Difference]: Without dead ends: 39065 [2021-11-03 05:08:51,137 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 [2021-11-03 05:08:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39065 states. [2021-11-03 05:08:53,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39065 to 39063. [2021-11-03 05:08:53,787 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) [2021-11-03 05:08:53,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39063 states to 39063 states and 55515 transitions. [2021-11-03 05:08:53,877 INFO L78 Accepts]: Start accepts. Automaton has 39063 states and 55515 transitions. Word has length 271 [2021-11-03 05:08:53,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:53,877 INFO L470 AbstractCegarLoop]: Abstraction has 39063 states and 55515 transitions. [2021-11-03 05:08:53,878 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) [2021-11-03 05:08:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 39063 states and 55515 transitions. [2021-11-03 05:08:53,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-03 05:08:53,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:53,955 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] [2021-11-03 05:08:53,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:08:53,956 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:53,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:53,956 INFO L85 PathProgramCache]: Analyzing trace with hash -18380819, now seen corresponding path program 1 times [2021-11-03 05:08:53,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:08:53,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844973772] [2021-11-03 05:08:53,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:53,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:08:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:08:54,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:08:54,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844973772] [2021-11-03 05:08:54,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844973772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:54,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:54,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:08:54,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865945549] [2021-11-03 05:08:54,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:08:54,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:08:54,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:08:54,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:08:54,196 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) [2021-11-03 05:08:57,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:57,394 INFO L93 Difference]: Finished difference Result 115254 states and 163663 transitions. [2021-11-03 05:08:57,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:08:57,395 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 [2021-11-03 05:08:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:57,588 INFO L225 Difference]: With dead ends: 115254 [2021-11-03 05:08:57,589 INFO L226 Difference]: Without dead ends: 77877 [2021-11-03 05:08:57,654 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 [2021-11-03 05:08:57,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77877 states. [2021-11-03 05:09:00,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77877 to 39096. [2021-11-03 05:09:00,411 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) [2021-11-03 05:09:00,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39096 states to 39096 states and 55548 transitions. [2021-11-03 05:09:00,524 INFO L78 Accepts]: Start accepts. Automaton has 39096 states and 55548 transitions. Word has length 271 [2021-11-03 05:09:00,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:09:00,525 INFO L470 AbstractCegarLoop]: Abstraction has 39096 states and 55548 transitions. [2021-11-03 05:09:00,525 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) [2021-11-03 05:09:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 39096 states and 55548 transitions. [2021-11-03 05:09:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-03 05:09:00,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:09:00,617 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] [2021-11-03 05:09:00,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 05:09:00,618 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:09:00,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:09:00,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1083911540, now seen corresponding path program 1 times [2021-11-03 05:09:00,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:09:00,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129698012] [2021-11-03 05:09:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:09:00,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:09:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:09:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:09:01,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:09:01,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129698012] [2021-11-03 05:09:01,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129698012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:09:01,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:09:01,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:09:01,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820395495] [2021-11-03 05:09:01,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:09:01,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:09:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:09:01,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:09:01,083 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) [2021-11-03 05:09:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:09:05,739 INFO L93 Difference]: Finished difference Result 113787 states and 161283 transitions. [2021-11-03 05:09:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:09:05,740 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 [2021-11-03 05:09:05,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:09:05,965 INFO L225 Difference]: With dead ends: 113787 [2021-11-03 05:09:05,965 INFO L226 Difference]: Without dead ends: 74891 [2021-11-03 05:09:06,033 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 [2021-11-03 05:09:06,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74891 states. [2021-11-03 05:09:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74891 to 74889. [2021-11-03 05:09:11,702 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) [2021-11-03 05:09:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74889 states to 74889 states and 105615 transitions. [2021-11-03 05:09:12,088 INFO L78 Accepts]: Start accepts. Automaton has 74889 states and 105615 transitions. Word has length 272 [2021-11-03 05:09:12,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:09:12,089 INFO L470 AbstractCegarLoop]: Abstraction has 74889 states and 105615 transitions. [2021-11-03 05:09:12,089 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) [2021-11-03 05:09:12,090 INFO L276 IsEmpty]: Start isEmpty. Operand 74889 states and 105615 transitions. [2021-11-03 05:09:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-03 05:09:12,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:09:12,200 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] [2021-11-03 05:09:12,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 05:09:12,200 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:09:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:09:12,201 INFO L85 PathProgramCache]: Analyzing trace with hash 145083143, now seen corresponding path program 1 times [2021-11-03 05:09:12,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:09:12,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447486872] [2021-11-03 05:09:12,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:09:12,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:09:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:09:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:09:12,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:09:12,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447486872] [2021-11-03 05:09:12,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447486872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:09:12,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:09:12,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:09:12,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061545365] [2021-11-03 05:09:12,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:09:12,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:09:12,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:09:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:09:12,594 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) [2021-11-03 05:09:20,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:09:20,202 INFO L93 Difference]: Finished difference Result 218779 states and 307759 transitions. [2021-11-03 05:09:20,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:09:20,202 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 [2021-11-03 05:09:20,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:09:20,457 INFO L225 Difference]: With dead ends: 218779 [2021-11-03 05:09:20,457 INFO L226 Difference]: Without dead ends: 146154 [2021-11-03 05:09:20,536 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 [2021-11-03 05:09:20,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146154 states.