./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-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_1e400bc8-45a0-4e42-b9d9-d12002e6c514/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e400bc8-45a0-4e42-b9d9-d12002e6c514/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_1e400bc8-45a0-4e42-b9d9-d12002e6c514/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e400bc8-45a0-4e42-b9d9-d12002e6c514/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e400bc8-45a0-4e42-b9d9-d12002e6c514/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_1e400bc8-45a0-4e42-b9d9-d12002e6c514/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 f4319f1617264b859ec72b12374ecf2c184fa129f0736ad4fd8fa304d4c3211b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:45:47,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:45:47,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:45:47,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:45:47,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:45:47,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:45:47,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:45:47,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:45:47,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:45:47,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:45:47,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:45:47,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:45:47,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:45:47,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:45:47,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:45:47,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:45:47,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:45:47,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:45:47,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:45:47,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:45:47,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:45:47,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:45:47,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:45:47,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:45:47,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:45:47,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:45:47,176 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:45:47,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:45:47,178 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:45:47,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:45:47,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:45:47,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:45:47,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:45:47,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:45:47,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:45:47,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:45:47,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:45:47,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:45:47,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:45:47,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:45:47,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:45:47,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e400bc8-45a0-4e42-b9d9-d12002e6c514/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 03:45:47,233 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:45:47,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:45:47,235 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:45:47,235 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:45:47,235 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:45:47,236 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:45:47,236 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:45:47,236 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:45:47,242 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:45:47,242 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:45:47,244 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:45:47,244 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:45:47,244 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:45:47,244 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:45:47,245 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:45:47,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:45:47,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:45:47,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:45:47,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:45:47,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:45:47,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 03:45:47,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:45:47,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 03:45:47,247 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:45:47,247 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:45:47,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 03:45:47,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:45:47,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 03:45:47,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:45:47,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:45:47,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:45:47,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:45:47,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:45:47,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 03:45:47,251 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:45:47,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:45:47,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 03:45:47,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:45:47,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:45:47,252 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_1e400bc8-45a0-4e42-b9d9-d12002e6c514/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e400bc8-45a0-4e42-b9d9-d12002e6c514/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4319f1617264b859ec72b12374ecf2c184fa129f0736ad4fd8fa304d4c3211b [2021-11-03 03:45:47,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:45:47,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:45:47,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:45:47,564 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:45:47,565 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:45:47,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e400bc8-45a0-4e42-b9d9-d12002e6c514/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-03 03:45:47,650 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e400bc8-45a0-4e42-b9d9-d12002e6c514/bin/utaipan-aC7eJsxGYH/data/c8dbf2b62/15ec1b472c4a4e8086bdd310c7094999/FLAGd88108e94 [2021-11-03 03:45:48,411 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:45:48,412 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e400bc8-45a0-4e42-b9d9-d12002e6c514/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-03 03:45:48,440 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e400bc8-45a0-4e42-b9d9-d12002e6c514/bin/utaipan-aC7eJsxGYH/data/c8dbf2b62/15ec1b472c4a4e8086bdd310c7094999/FLAGd88108e94 [2021-11-03 03:45:48,661 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e400bc8-45a0-4e42-b9d9-d12002e6c514/bin/utaipan-aC7eJsxGYH/data/c8dbf2b62/15ec1b472c4a4e8086bdd310c7094999 [2021-11-03 03:45:48,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:45:48,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:45:48,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:45:48,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:45:48,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:45:48,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4944d04a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:48, skipping insertion in model container [2021-11-03 03:45:48,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:45:48" (1/1) ... [2021-11-03 03:45:48,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:45:48,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:45:49,180 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_1e400bc8-45a0-4e42-b9d9-d12002e6c514/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[21524,21537] [2021-11-03 03:45:49,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:45:49,381 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:45:49,661 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_1e400bc8-45a0-4e42-b9d9-d12002e6c514/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[21524,21537] [2021-11-03 03:45:49,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:45:49,856 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:45:49,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49 WrapperNode [2021-11-03 03:45:49,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:45:49,872 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:45:49,873 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:45:49,873 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:45:49,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2021-11-03 03:45:49,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2021-11-03 03:45:50,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:45:50,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:45:50,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:45:50,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:45:50,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2021-11-03 03:45:50,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2021-11-03 03:45:50,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2021-11-03 03:45:50,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2021-11-03 03:45:50,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2021-11-03 03:45:50,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2021-11-03 03:45:50,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2021-11-03 03:45:50,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:45:50,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:45:50,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:45:50,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:45:50,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (1/1) ... [2021-11-03 03:45:50,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:45:50,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e400bc8-45a0-4e42-b9d9-d12002e6c514/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:45:50,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e400bc8-45a0-4e42-b9d9-d12002e6c514/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:45:50,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1e400bc8-45a0-4e42-b9d9-d12002e6c514/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:45:50,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 03:45:50,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:45:50,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:45:50,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:45:53,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:45:53,600 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 03:45:53,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:53 BoogieIcfgContainer [2021-11-03 03:45:53,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:45:53,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:45:53,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:45:53,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:45:53,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:45:48" (1/3) ... [2021-11-03 03:45:53,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722a530d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:53, skipping insertion in model container [2021-11-03 03:45:53,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:49" (2/3) ... [2021-11-03 03:45:53,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722a530d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:53, skipping insertion in model container [2021-11-03 03:45:53,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:53" (3/3) ... [2021-11-03 03:45:53,612 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-11-03 03:45:53,618 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:45:53,618 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 03:45:53,671 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:45:53,677 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 03:45:53,678 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 03:45:53,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 598 states, 596 states have (on average 1.7147651006711409) internal successors, (1022), 597 states have internal predecessors, (1022), 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 03:45:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-03 03:45:53,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:53,730 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] [2021-11-03 03:45:53,731 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:53,737 INFO L85 PathProgramCache]: Analyzing trace with hash 649333015, now seen corresponding path program 1 times [2021-11-03 03:45:53,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:53,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024100012] [2021-11-03 03:45:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:53,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:54,499 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 03:45:54,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:54,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024100012] [2021-11-03 03:45:54,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024100012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:54,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:54,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:54,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392109555] [2021-11-03 03:45:54,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:54,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:54,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:54,541 INFO L87 Difference]: Start difference. First operand has 598 states, 596 states have (on average 1.7147651006711409) internal successors, (1022), 597 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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 03:45:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:54,704 INFO L93 Difference]: Finished difference Result 848 states and 1425 transitions. [2021-11-03 03:45:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:54,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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 173 [2021-11-03 03:45:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:54,738 INFO L225 Difference]: With dead ends: 848 [2021-11-03 03:45:54,738 INFO L226 Difference]: Without dead ends: 708 [2021-11-03 03:45:54,743 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 03:45:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-11-03 03:45:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 706. [2021-11-03 03:45:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 1.6411347517730497) internal successors, (1157), 705 states have internal predecessors, (1157), 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 03:45:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1157 transitions. [2021-11-03 03:45:54,852 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1157 transitions. Word has length 173 [2021-11-03 03:45:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:54,859 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 1157 transitions. [2021-11-03 03:45:54,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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 03:45:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1157 transitions. [2021-11-03 03:45:54,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-03 03:45:54,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:54,864 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] [2021-11-03 03:45:54,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 03:45:54,865 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:54,865 INFO L85 PathProgramCache]: Analyzing trace with hash -999092573, now seen corresponding path program 1 times [2021-11-03 03:45:54,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:54,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514075893] [2021-11-03 03:45:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:54,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:55,086 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 03:45:55,087 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:55,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514075893] [2021-11-03 03:45:55,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514075893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:55,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:55,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:55,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054830251] [2021-11-03 03:45:55,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:55,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:55,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:55,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:55,095 INFO L87 Difference]: Start difference. First operand 706 states and 1157 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 03:45:55,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:55,170 INFO L93 Difference]: Finished difference Result 1085 states and 1768 transitions. [2021-11-03 03:45:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:55,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-11-03 03:45:55,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:55,179 INFO L225 Difference]: With dead ends: 1085 [2021-11-03 03:45:55,180 INFO L226 Difference]: Without dead ends: 841 [2021-11-03 03:45:55,185 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 03:45:55,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-11-03 03:45:55,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 839. [2021-11-03 03:45:55,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 1.6324582338902147) internal successors, (1368), 838 states have internal predecessors, (1368), 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 03:45:55,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1368 transitions. [2021-11-03 03:45:55,253 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1368 transitions. Word has length 175 [2021-11-03 03:45:55,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:55,254 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 1368 transitions. [2021-11-03 03:45:55,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 03:45:55,255 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1368 transitions. [2021-11-03 03:45:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-03 03:45:55,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:55,263 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] [2021-11-03 03:45:55,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 03:45:55,263 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:55,264 INFO L85 PathProgramCache]: Analyzing trace with hash 728666496, now seen corresponding path program 1 times [2021-11-03 03:45:55,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:55,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733450651] [2021-11-03 03:45:55,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:55,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:55,491 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 03:45:55,492 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:55,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733450651] [2021-11-03 03:45:55,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733450651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:55,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:55,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:55,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086363804] [2021-11-03 03:45:55,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:55,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:55,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:55,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:55,504 INFO L87 Difference]: Start difference. First operand 839 states and 1368 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 03:45:55,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:55,561 INFO L93 Difference]: Finished difference Result 1523 states and 2471 transitions. [2021-11-03 03:45:55,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:55,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 179 [2021-11-03 03:45:55,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:55,572 INFO L225 Difference]: With dead ends: 1523 [2021-11-03 03:45:55,572 INFO L226 Difference]: Without dead ends: 1148 [2021-11-03 03:45:55,574 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 03:45:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-11-03 03:45:55,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1146. [2021-11-03 03:45:55,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 1.6270742358078603) internal successors, (1863), 1145 states have internal predecessors, (1863), 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 03:45:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1863 transitions. [2021-11-03 03:45:55,658 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1863 transitions. Word has length 179 [2021-11-03 03:45:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:55,659 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 1863 transitions. [2021-11-03 03:45:55,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 03:45:55,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1863 transitions. [2021-11-03 03:45:55,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-03 03:45:55,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:55,663 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] [2021-11-03 03:45:55,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 03:45:55,667 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:55,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:55,669 INFO L85 PathProgramCache]: Analyzing trace with hash 921892983, now seen corresponding path program 1 times [2021-11-03 03:45:55,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:55,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581175063] [2021-11-03 03:45:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:55,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:55,806 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 03:45:55,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:55,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581175063] [2021-11-03 03:45:55,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581175063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:55,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:55,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:55,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636763426] [2021-11-03 03:45:55,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:55,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:55,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:55,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:55,813 INFO L87 Difference]: Start difference. First operand 1146 states and 1863 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 03:45:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:55,885 INFO L93 Difference]: Finished difference Result 2226 states and 3601 transitions. [2021-11-03 03:45:55,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:55,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 181 [2021-11-03 03:45:55,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:55,896 INFO L225 Difference]: With dead ends: 2226 [2021-11-03 03:45:55,897 INFO L226 Difference]: Without dead ends: 1544 [2021-11-03 03:45:55,899 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 03:45:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-11-03 03:45:55,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1542. [2021-11-03 03:45:55,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.6210253082414017) internal successors, (2498), 1541 states have internal predecessors, (2498), 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 03:45:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2498 transitions. [2021-11-03 03:45:55,977 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2498 transitions. Word has length 181 [2021-11-03 03:45:55,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:55,978 INFO L470 AbstractCegarLoop]: Abstraction has 1542 states and 2498 transitions. [2021-11-03 03:45:55,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 03:45:55,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2498 transitions. [2021-11-03 03:45:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-03 03:45:55,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:55,983 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] [2021-11-03 03:45:55,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 03:45:55,984 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:55,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2060015994, now seen corresponding path program 1 times [2021-11-03 03:45:55,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:55,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883782306] [2021-11-03 03:45:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:55,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:56,105 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 03:45:56,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:56,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883782306] [2021-11-03 03:45:56,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883782306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:56,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:56,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:56,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436102180] [2021-11-03 03:45:56,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:56,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:56,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:56,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:56,108 INFO L87 Difference]: Start difference. First operand 1542 states and 2498 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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 03:45:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:56,261 INFO L93 Difference]: Finished difference Result 3454 states and 5581 transitions. [2021-11-03 03:45:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:56,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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 185 [2021-11-03 03:45:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:56,277 INFO L225 Difference]: With dead ends: 3454 [2021-11-03 03:45:56,277 INFO L226 Difference]: Without dead ends: 2399 [2021-11-03 03:45:56,280 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 03:45:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-11-03 03:45:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2397. [2021-11-03 03:45:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 2396 states have (on average 1.6160267111853088) internal successors, (3872), 2396 states have internal predecessors, (3872), 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 03:45:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3872 transitions. [2021-11-03 03:45:56,411 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3872 transitions. Word has length 185 [2021-11-03 03:45:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:56,411 INFO L470 AbstractCegarLoop]: Abstraction has 2397 states and 3872 transitions. [2021-11-03 03:45:56,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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 03:45:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3872 transitions. [2021-11-03 03:45:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-03 03:45:56,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:56,415 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] [2021-11-03 03:45:56,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 03:45:56,415 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash -522273241, now seen corresponding path program 1 times [2021-11-03 03:45:56,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:56,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021406058] [2021-11-03 03:45:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:56,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:56,561 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 03:45:56,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:56,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021406058] [2021-11-03 03:45:56,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021406058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:56,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:56,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:56,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023059404] [2021-11-03 03:45:56,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:56,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:56,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:56,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:56,564 INFO L87 Difference]: Start difference. First operand 2397 states and 3872 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 03:45:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:56,760 INFO L93 Difference]: Finished difference Result 5385 states and 8679 transitions. [2021-11-03 03:45:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:56,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 187 [2021-11-03 03:45:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:56,783 INFO L225 Difference]: With dead ends: 5385 [2021-11-03 03:45:56,784 INFO L226 Difference]: Without dead ends: 3475 [2021-11-03 03:45:56,786 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 03:45:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3475 states. [2021-11-03 03:45:56,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3475 to 3473. [2021-11-03 03:45:56,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3473 states, 3472 states have (on average 1.6117511520737327) internal successors, (5596), 3472 states have internal predecessors, (5596), 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 03:45:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3473 states to 3473 states and 5596 transitions. [2021-11-03 03:45:56,998 INFO L78 Accepts]: Start accepts. Automaton has 3473 states and 5596 transitions. Word has length 187 [2021-11-03 03:45:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:56,999 INFO L470 AbstractCegarLoop]: Abstraction has 3473 states and 5596 transitions. [2021-11-03 03:45:56,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 03:45:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3473 states and 5596 transitions. [2021-11-03 03:45:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-03 03:45:57,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:57,003 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] [2021-11-03 03:45:57,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 03:45:57,004 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:57,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:57,004 INFO L85 PathProgramCache]: Analyzing trace with hash 461259844, now seen corresponding path program 1 times [2021-11-03 03:45:57,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:57,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24807702] [2021-11-03 03:45:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:57,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:57,148 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 03:45:57,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:57,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24807702] [2021-11-03 03:45:57,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24807702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:57,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:57,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:57,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509470366] [2021-11-03 03:45:57,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:57,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:57,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:57,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:57,151 INFO L87 Difference]: Start difference. First operand 3473 states and 5596 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 03:45:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:57,538 INFO L93 Difference]: Finished difference Result 8805 states and 14175 transitions. [2021-11-03 03:45:57,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:57,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 191 [2021-11-03 03:45:57,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:57,579 INFO L225 Difference]: With dead ends: 8805 [2021-11-03 03:45:57,579 INFO L226 Difference]: Without dead ends: 5842 [2021-11-03 03:45:57,587 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 03:45:57,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5842 states. [2021-11-03 03:45:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5842 to 5840. [2021-11-03 03:45:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5840 states, 5839 states have (on average 1.6072957698236) internal successors, (9385), 5839 states have internal predecessors, (9385), 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 03:45:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5840 states to 5840 states and 9385 transitions. [2021-11-03 03:45:58,003 INFO L78 Accepts]: Start accepts. Automaton has 5840 states and 9385 transitions. Word has length 191 [2021-11-03 03:45:58,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:58,003 INFO L470 AbstractCegarLoop]: Abstraction has 5840 states and 9385 transitions. [2021-11-03 03:45:58,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 03:45:58,004 INFO L276 IsEmpty]: Start isEmpty. Operand 5840 states and 9385 transitions. [2021-11-03 03:45:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-03 03:45:58,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:58,007 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] [2021-11-03 03:45:58,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 03:45:58,008 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:58,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1968065615, now seen corresponding path program 1 times [2021-11-03 03:45:58,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:58,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508985154] [2021-11-03 03:45:58,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:58,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:58,166 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 03:45:58,166 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:58,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508985154] [2021-11-03 03:45:58,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508985154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:58,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:58,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:58,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090434596] [2021-11-03 03:45:58,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:58,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:58,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:58,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:58,169 INFO L87 Difference]: Start difference. First operand 5840 states and 9385 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 03:45:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:45:58,644 INFO L93 Difference]: Finished difference Result 14156 states and 22733 transitions. [2021-11-03 03:45:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:45:58,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 193 [2021-11-03 03:45:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:45:58,706 INFO L225 Difference]: With dead ends: 14156 [2021-11-03 03:45:58,707 INFO L226 Difference]: Without dead ends: 8826 [2021-11-03 03:45:58,718 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 03:45:58,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8826 states. [2021-11-03 03:45:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8826 to 8824. [2021-11-03 03:45:59,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8824 states, 8823 states have (on average 1.6042162529751784) internal successors, (14154), 8823 states have internal predecessors, (14154), 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 03:45:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8824 states to 8824 states and 14154 transitions. [2021-11-03 03:45:59,302 INFO L78 Accepts]: Start accepts. Automaton has 8824 states and 14154 transitions. Word has length 193 [2021-11-03 03:45:59,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:45:59,303 INFO L470 AbstractCegarLoop]: Abstraction has 8824 states and 14154 transitions. [2021-11-03 03:45:59,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 03:45:59,303 INFO L276 IsEmpty]: Start isEmpty. Operand 8824 states and 14154 transitions. [2021-11-03 03:45:59,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-03 03:45:59,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:45:59,307 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] [2021-11-03 03:45:59,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 03:45:59,307 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:45:59,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:45:59,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1434097292, now seen corresponding path program 1 times [2021-11-03 03:45:59,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:45:59,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869604660] [2021-11-03 03:45:59,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:45:59,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:45:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:45:59,457 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 03:45:59,457 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:45:59,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869604660] [2021-11-03 03:45:59,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869604660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:45:59,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:45:59,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:45:59,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309910366] [2021-11-03 03:45:59,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:45:59,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:45:59,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:45:59,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:45:59,460 INFO L87 Difference]: Start difference. First operand 8824 states and 14154 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 03:46:00,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:00,330 INFO L93 Difference]: Finished difference Result 23624 states and 37889 transitions. [2021-11-03 03:46:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:46:00,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 197 [2021-11-03 03:46:00,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:00,396 INFO L225 Difference]: With dead ends: 23624 [2021-11-03 03:46:00,396 INFO L226 Difference]: Without dead ends: 15333 [2021-11-03 03:46:00,412 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 03:46:00,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15333 states. [2021-11-03 03:46:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15333 to 15331. [2021-11-03 03:46:01,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15331 states, 15330 states have (on average 1.5996086105675147) internal successors, (24522), 15330 states have internal predecessors, (24522), 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 03:46:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15331 states to 15331 states and 24522 transitions. [2021-11-03 03:46:01,366 INFO L78 Accepts]: Start accepts. Automaton has 15331 states and 24522 transitions. Word has length 197 [2021-11-03 03:46:01,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:01,367 INFO L470 AbstractCegarLoop]: Abstraction has 15331 states and 24522 transitions. [2021-11-03 03:46:01,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 03:46:01,368 INFO L276 IsEmpty]: Start isEmpty. Operand 15331 states and 24522 transitions. [2021-11-03 03:46:01,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-03 03:46:01,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:01,371 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] [2021-11-03 03:46:01,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 03:46:01,371 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:01,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:01,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1024393755, now seen corresponding path program 1 times [2021-11-03 03:46:01,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:01,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947208858] [2021-11-03 03:46:01,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:01,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:01,485 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 03:46:01,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:01,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947208858] [2021-11-03 03:46:01,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947208858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:01,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:01,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 03:46:01,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672523582] [2021-11-03 03:46:01,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:46:01,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:01,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:46:01,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:46:01,488 INFO L87 Difference]: Start difference. First operand 15331 states and 24522 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 03:46:02,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:02,655 INFO L93 Difference]: Finished difference Result 38443 states and 61495 transitions. [2021-11-03 03:46:02,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:46:02,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 199 [2021-11-03 03:46:02,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:02,731 INFO L225 Difference]: With dead ends: 38443 [2021-11-03 03:46:02,732 INFO L226 Difference]: Without dead ends: 23645 [2021-11-03 03:46:02,762 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 03:46:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23645 states. [2021-11-03 03:46:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23645 to 23643. [2021-11-03 03:46:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23643 states, 23642 states have (on average 1.5971576008797903) internal successors, (37760), 23642 states have internal predecessors, (37760), 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 03:46:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23643 states to 23643 states and 37760 transitions. [2021-11-03 03:46:04,150 INFO L78 Accepts]: Start accepts. Automaton has 23643 states and 37760 transitions. Word has length 199 [2021-11-03 03:46:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:04,151 INFO L470 AbstractCegarLoop]: Abstraction has 23643 states and 37760 transitions. [2021-11-03 03:46:04,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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 03:46:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 23643 states and 37760 transitions. [2021-11-03 03:46:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-03 03:46:04,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:04,156 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] [2021-11-03 03:46:04,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 03:46:04,157 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:04,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:04,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1273865352, now seen corresponding path program 1 times [2021-11-03 03:46:04,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:04,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204187911] [2021-11-03 03:46:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:04,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:04,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:04,331 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 03:46:04,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:04,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204187911] [2021-11-03 03:46:04,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204187911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:04,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:04,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:46:04,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076237165] [2021-11-03 03:46:04,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 03:46:04,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:04,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 03:46:04,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:46:04,336 INFO L87 Difference]: Start difference. First operand 23643 states and 37760 transitions. Second operand has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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 03:46:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:06,564 INFO L93 Difference]: Finished difference Result 58365 states and 92997 transitions. [2021-11-03 03:46:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 03:46:06,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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 203 [2021-11-03 03:46:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:06,693 INFO L225 Difference]: With dead ends: 58365 [2021-11-03 03:46:06,694 INFO L226 Difference]: Without dead ends: 35278 [2021-11-03 03:46:06,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-03 03:46:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35278 states. [2021-11-03 03:46:08,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35278 to 35260. [2021-11-03 03:46:08,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35260 states, 35259 states have (on average 1.5864885561133328) internal successors, (55938), 35259 states have internal predecessors, (55938), 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 03:46:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35260 states to 35260 states and 55938 transitions. [2021-11-03 03:46:08,480 INFO L78 Accepts]: Start accepts. Automaton has 35260 states and 55938 transitions. Word has length 203 [2021-11-03 03:46:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:08,480 INFO L470 AbstractCegarLoop]: Abstraction has 35260 states and 55938 transitions. [2021-11-03 03:46:08,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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 03:46:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 35260 states and 55938 transitions. [2021-11-03 03:46:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-03 03:46:08,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:08,485 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] [2021-11-03 03:46:08,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 03:46:08,486 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:08,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:08,486 INFO L85 PathProgramCache]: Analyzing trace with hash -906740057, now seen corresponding path program 1 times [2021-11-03 03:46:08,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:08,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27391286] [2021-11-03 03:46:08,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:08,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:08,649 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 03:46:08,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:08,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27391286] [2021-11-03 03:46:08,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27391286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:08,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:08,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:46:08,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049664086] [2021-11-03 03:46:08,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:46:08,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:08,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:46:08,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:46:08,653 INFO L87 Difference]: Start difference. First operand 35260 states and 55938 transitions. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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 03:46:10,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:10,078 INFO L93 Difference]: Finished difference Result 69966 states and 110973 transitions. [2021-11-03 03:46:10,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:46:10,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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 204 [2021-11-03 03:46:10,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:10,186 INFO L225 Difference]: With dead ends: 69966 [2021-11-03 03:46:10,186 INFO L226 Difference]: Without dead ends: 35262 [2021-11-03 03:46:10,219 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 03:46:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2021-11-03 03:46:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 35260. [2021-11-03 03:46:11,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35260 states, 35259 states have (on average 1.5837658470177827) internal successors, (55842), 35259 states have internal predecessors, (55842), 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 03:46:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35260 states to 35260 states and 55842 transitions. [2021-11-03 03:46:11,889 INFO L78 Accepts]: Start accepts. Automaton has 35260 states and 55842 transitions. Word has length 204 [2021-11-03 03:46:11,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:11,890 INFO L470 AbstractCegarLoop]: Abstraction has 35260 states and 55842 transitions. [2021-11-03 03:46:11,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 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 03:46:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 35260 states and 55842 transitions. [2021-11-03 03:46:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-03 03:46:11,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:11,893 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] [2021-11-03 03:46:11,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 03:46:11,894 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:11,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:11,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1888767519, now seen corresponding path program 1 times [2021-11-03 03:46:11,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:11,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147238481] [2021-11-03 03:46:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:11,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:12,008 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 03:46:12,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:12,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147238481] [2021-11-03 03:46:12,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147238481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:12,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:12,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:46:12,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498648881] [2021-11-03 03:46:12,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:46:12,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:12,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:46:12,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:46:12,011 INFO L87 Difference]: Start difference. First operand 35260 states and 55842 transitions. Second operand has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 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 03:46:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:13,572 INFO L93 Difference]: Finished difference Result 69966 states and 110781 transitions. [2021-11-03 03:46:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:46:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 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 205 [2021-11-03 03:46:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:13,663 INFO L225 Difference]: With dead ends: 69966 [2021-11-03 03:46:13,663 INFO L226 Difference]: Without dead ends: 35262 [2021-11-03 03:46:13,704 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 03:46:13,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2021-11-03 03:46:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 35260. [2021-11-03 03:46:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35260 states, 35259 states have (on average 1.5810431379222327) internal successors, (55746), 35259 states have internal predecessors, (55746), 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 03:46:15,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35260 states to 35260 states and 55746 transitions. [2021-11-03 03:46:15,396 INFO L78 Accepts]: Start accepts. Automaton has 35260 states and 55746 transitions. Word has length 205 [2021-11-03 03:46:15,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:15,397 INFO L470 AbstractCegarLoop]: Abstraction has 35260 states and 55746 transitions. [2021-11-03 03:46:15,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 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 03:46:15,397 INFO L276 IsEmpty]: Start isEmpty. Operand 35260 states and 55746 transitions. [2021-11-03 03:46:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-03 03:46:15,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:15,401 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] [2021-11-03 03:46:15,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-03 03:46:15,401 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:15,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1640252818, now seen corresponding path program 1 times [2021-11-03 03:46:15,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:15,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927059021] [2021-11-03 03:46:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:15,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:15,511 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 03:46:15,511 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:15,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927059021] [2021-11-03 03:46:15,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927059021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:15,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:15,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:46:15,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083222810] [2021-11-03 03:46:15,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:46:15,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:15,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:46:15,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:46:15,514 INFO L87 Difference]: Start difference. First operand 35260 states and 55746 transitions. Second operand has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 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 03:46:17,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:17,078 INFO L93 Difference]: Finished difference Result 69966 states and 110589 transitions. [2021-11-03 03:46:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:46:17,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 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 206 [2021-11-03 03:46:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:17,164 INFO L225 Difference]: With dead ends: 69966 [2021-11-03 03:46:17,165 INFO L226 Difference]: Without dead ends: 35262 [2021-11-03 03:46:17,205 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 03:46:17,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2021-11-03 03:46:18,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 35260. [2021-11-03 03:46:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35260 states, 35259 states have (on average 1.5783204288266826) internal successors, (55650), 35259 states have internal predecessors, (55650), 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 03:46:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35260 states to 35260 states and 55650 transitions. [2021-11-03 03:46:18,799 INFO L78 Accepts]: Start accepts. Automaton has 35260 states and 55650 transitions. Word has length 206 [2021-11-03 03:46:18,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:18,799 INFO L470 AbstractCegarLoop]: Abstraction has 35260 states and 55650 transitions. [2021-11-03 03:46:18,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.5) internal successors, (206), 4 states have internal predecessors, (206), 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 03:46:18,799 INFO L276 IsEmpty]: Start isEmpty. Operand 35260 states and 55650 transitions. [2021-11-03 03:46:18,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-03 03:46:18,802 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:18,803 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] [2021-11-03 03:46:18,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 03:46:18,803 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash 633824454, now seen corresponding path program 1 times [2021-11-03 03:46:18,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:18,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565773320] [2021-11-03 03:46:18,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:18,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:18,905 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 03:46:18,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:18,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565773320] [2021-11-03 03:46:18,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565773320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:18,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:18,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:46:18,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630281067] [2021-11-03 03:46:18,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:46:18,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:18,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:46:18,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:46:18,908 INFO L87 Difference]: Start difference. First operand 35260 states and 55650 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 03:46:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:20,578 INFO L93 Difference]: Finished difference Result 69966 states and 110397 transitions. [2021-11-03 03:46:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:46:20,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 207 [2021-11-03 03:46:20,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:20,630 INFO L225 Difference]: With dead ends: 69966 [2021-11-03 03:46:20,631 INFO L226 Difference]: Without dead ends: 35262 [2021-11-03 03:46:20,657 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 03:46:20,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2021-11-03 03:46:22,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 35260. [2021-11-03 03:46:22,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35260 states, 35259 states have (on average 1.5755977197311324) internal successors, (55554), 35259 states have internal predecessors, (55554), 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 03:46:22,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35260 states to 35260 states and 55554 transitions. [2021-11-03 03:46:22,109 INFO L78 Accepts]: Start accepts. Automaton has 35260 states and 55554 transitions. Word has length 207 [2021-11-03 03:46:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:22,110 INFO L470 AbstractCegarLoop]: Abstraction has 35260 states and 55554 transitions. [2021-11-03 03:46:22,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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 03:46:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 35260 states and 55554 transitions. [2021-11-03 03:46:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-03 03:46:22,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:22,112 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] [2021-11-03 03:46:22,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 03:46:22,113 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:22,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1879666123, now seen corresponding path program 1 times [2021-11-03 03:46:22,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:22,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583244342] [2021-11-03 03:46:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:22,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:22,225 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 03:46:22,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:22,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583244342] [2021-11-03 03:46:22,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583244342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:22,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:22,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 03:46:22,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560638721] [2021-11-03 03:46:22,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:46:22,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:22,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:46:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:46:22,229 INFO L87 Difference]: Start difference. First operand 35260 states and 55554 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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 03:46:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:23,999 INFO L93 Difference]: Finished difference Result 69966 states and 110205 transitions. [2021-11-03 03:46:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:46:23,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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 208 [2021-11-03 03:46:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:24,055 INFO L225 Difference]: With dead ends: 69966 [2021-11-03 03:46:24,055 INFO L226 Difference]: Without dead ends: 35262 [2021-11-03 03:46:24,079 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 03:46:24,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2021-11-03 03:46:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 35260. [2021-11-03 03:46:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35260 states, 35259 states have (on average 1.5728750106355824) internal successors, (55458), 35259 states have internal predecessors, (55458), 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 03:46:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35260 states to 35260 states and 55458 transitions. [2021-11-03 03:46:25,625 INFO L78 Accepts]: Start accepts. Automaton has 35260 states and 55458 transitions. Word has length 208 [2021-11-03 03:46:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:25,626 INFO L470 AbstractCegarLoop]: Abstraction has 35260 states and 55458 transitions. [2021-11-03 03:46:25,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 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 03:46:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 35260 states and 55458 transitions. [2021-11-03 03:46:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-03 03:46:25,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:25,628 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] [2021-11-03 03:46:25,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-03 03:46:25,628 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:25,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:25,629 INFO L85 PathProgramCache]: Analyzing trace with hash 304789734, now seen corresponding path program 1 times [2021-11-03 03:46:25,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:25,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707643871] [2021-11-03 03:46:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:25,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:25,909 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 03:46:25,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:25,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707643871] [2021-11-03 03:46:25,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707643871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:25,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:25,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:46:25,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971633154] [2021-11-03 03:46:25,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 03:46:25,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:25,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 03:46:25,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:46:25,912 INFO L87 Difference]: Start difference. First operand 35260 states and 55458 transitions. Second operand has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 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 03:46:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:28,193 INFO L93 Difference]: Finished difference Result 69966 states and 110013 transitions. [2021-11-03 03:46:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:46:28,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 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 210 [2021-11-03 03:46:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:28,271 INFO L225 Difference]: With dead ends: 69966 [2021-11-03 03:46:28,272 INFO L226 Difference]: Without dead ends: 35262 [2021-11-03 03:46:28,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:46:28,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2021-11-03 03:46:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 35260. [2021-11-03 03:46:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35260 states, 35259 states have (on average 1.5719674409370656) internal successors, (55426), 35259 states have internal predecessors, (55426), 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 03:46:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35260 states to 35260 states and 55426 transitions. [2021-11-03 03:46:29,936 INFO L78 Accepts]: Start accepts. Automaton has 35260 states and 55426 transitions. Word has length 210 [2021-11-03 03:46:29,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:29,937 INFO L470 AbstractCegarLoop]: Abstraction has 35260 states and 55426 transitions. [2021-11-03 03:46:29,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 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 03:46:29,937 INFO L276 IsEmpty]: Start isEmpty. Operand 35260 states and 55426 transitions. [2021-11-03 03:46:29,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-03 03:46:29,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:29,939 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] [2021-11-03 03:46:29,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 03:46:29,939 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:29,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:29,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1618024360, now seen corresponding path program 1 times [2021-11-03 03:46:29,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:29,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175553410] [2021-11-03 03:46:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:29,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:30,201 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 03:46:30,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:30,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175553410] [2021-11-03 03:46:30,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175553410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:30,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:30,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 03:46:30,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726436340] [2021-11-03 03:46:30,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 03:46:30,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:30,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 03:46:30,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:46:30,205 INFO L87 Difference]: Start difference. First operand 35260 states and 55426 transitions. Second operand has 7 states, 7 states have (on average 30.428571428571427) internal successors, (213), 7 states have internal predecessors, (213), 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 03:46:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:33,216 INFO L93 Difference]: Finished difference Result 86899 states and 136126 transitions. [2021-11-03 03:46:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:46:33,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.428571428571427) internal successors, (213), 7 states have internal predecessors, (213), 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 213 [2021-11-03 03:46:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:33,315 INFO L225 Difference]: With dead ends: 86899 [2021-11-03 03:46:33,315 INFO L226 Difference]: Without dead ends: 52195 [2021-11-03 03:46:33,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:46:33,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52195 states. [2021-11-03 03:46:35,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52195 to 52193. [2021-11-03 03:46:36,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52193 states, 52192 states have (on average 1.5625958001226241) internal successors, (81555), 52192 states have internal predecessors, (81555), 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 03:46:36,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52193 states to 52193 states and 81555 transitions. [2021-11-03 03:46:36,109 INFO L78 Accepts]: Start accepts. Automaton has 52193 states and 81555 transitions. Word has length 213 [2021-11-03 03:46:36,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:36,110 INFO L470 AbstractCegarLoop]: Abstraction has 52193 states and 81555 transitions. [2021-11-03 03:46:36,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.428571428571427) internal successors, (213), 7 states have internal predecessors, (213), 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 03:46:36,110 INFO L276 IsEmpty]: Start isEmpty. Operand 52193 states and 81555 transitions. [2021-11-03 03:46:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-03 03:46:36,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:36,111 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] [2021-11-03 03:46:36,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-03 03:46:36,112 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 03:46:36,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:36,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1464086201, now seen corresponding path program 1 times [2021-11-03 03:46:36,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 03:46:36,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783756629] [2021-11-03 03:46:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:36,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 03:46:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:36,411 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 03:46:36,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 03:46:36,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783756629] [2021-11-03 03:46:36,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783756629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:36,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:36,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 03:46:36,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518384182] [2021-11-03 03:46:36,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:46:36,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 03:46:36,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:46:36,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:46:36,414 INFO L87 Difference]: Start difference. First operand 52193 states and 81555 transitions. Second operand has 6 states, 6 states have (on average 35.666666666666664) internal successors, (214), 6 states have internal predecessors, (214), 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)