./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9722ff92ac7fe0a04a9fad473fb73ed6306a5571935abb587177743f8c4febdd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:12:51,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:12:51,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:12:51,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:12:51,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:12:51,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:12:51,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:12:51,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:12:51,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:12:51,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:12:51,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:12:51,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:12:51,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:12:51,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:12:51,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:12:51,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:12:51,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:12:51,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:12:51,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:12:51,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:12:51,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:12:51,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:12:51,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:12:51,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:12:51,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:12:51,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:12:51,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:12:51,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:12:51,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:12:51,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:12:51,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:12:51,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:12:51,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:12:51,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:12:51,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:12:51,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:12:51,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:12:51,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:12:51,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:12:51,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:12:51,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:12:51,225 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:12:51,272 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:12:51,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:12:51,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:12:51,276 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:12:51,276 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:12:51,276 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:12:51,276 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:12:51,277 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:12:51,283 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:12:51,284 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:12:51,285 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:12:51,285 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:12:51,286 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:12:51,286 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:12:51,286 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:12:51,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:12:51,287 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:12:51,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:12:51,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:12:51,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:12:51,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:12:51,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:12:51,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:12:51,289 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:12:51,289 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:12:51,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:12:51,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:12:51,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:12:51,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:12:51,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:12:51,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:12:51,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:12:51,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:12:51,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:12:51,294 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:12:51,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:12:51,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:12:51,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:12:51,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:12:51,295 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_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9722ff92ac7fe0a04a9fad473fb73ed6306a5571935abb587177743f8c4febdd [2021-11-07 01:12:51,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:12:51,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:12:51,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:12:51,623 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:12:51,624 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:12:51,625 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-07 01:12:51,732 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/data/684ef7cd7/3056d22b70f848998bdbc2323ae6d9e5/FLAG2a720d13e [2021-11-07 01:12:52,528 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:12:52,529 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-07 01:12:52,561 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/data/684ef7cd7/3056d22b70f848998bdbc2323ae6d9e5/FLAG2a720d13e [2021-11-07 01:12:52,575 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/data/684ef7cd7/3056d22b70f848998bdbc2323ae6d9e5 [2021-11-07 01:12:52,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:12:52,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:12:52,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:12:52,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:12:52,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:12:52,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:52" (1/1) ... [2021-11-07 01:12:52,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d564749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:52, skipping insertion in model container [2021-11-07 01:12:52,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:12:52" (1/1) ... [2021-11-07 01:12:52,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:12:52,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:12:53,376 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_7321c15f-f34c-4127-8837-631b830820a5/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[26802,26815] [2021-11-07 01:12:53,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:12:53,596 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:12:53,880 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_7321c15f-f34c-4127-8837-631b830820a5/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[26802,26815] [2021-11-07 01:12:54,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:12:54,030 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:12:54,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:54 WrapperNode [2021-11-07 01:12:54,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:12:54,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:12:54,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:12:54,033 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:12:54,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:54" (1/1) ... [2021-11-07 01:12:54,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:54" (1/1) ... [2021-11-07 01:12:54,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:12:54,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:12:54,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:12:54,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:12:54,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:54" (1/1) ... [2021-11-07 01:12:54,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:54" (1/1) ... [2021-11-07 01:12:54,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:54" (1/1) ... [2021-11-07 01:12:54,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:54" (1/1) ... [2021-11-07 01:12:54,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:54" (1/1) ... [2021-11-07 01:12:54,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:54" (1/1) ... [2021-11-07 01:12:54,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:54" (1/1) ... [2021-11-07 01:12:54,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:12:54,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:12:54,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:12:54,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:12:54,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:54" (1/1) ... [2021-11-07 01:12:54,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:12:54,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:12:54,374 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:12:54,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7321c15f-f34c-4127-8837-631b830820a5/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:12:54,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:12:54,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:12:54,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:12:54,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:12:58,447 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:12:58,447 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:12:58,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:12:58 BoogieIcfgContainer [2021-11-07 01:12:58,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:12:58,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:12:58,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:12:58,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:12:58,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:12:52" (1/3) ... [2021-11-07 01:12:58,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4876ea50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:12:58, skipping insertion in model container [2021-11-07 01:12:58,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:12:54" (2/3) ... [2021-11-07 01:12:58,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4876ea50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:12:58, skipping insertion in model container [2021-11-07 01:12:58,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:12:58" (3/3) ... [2021-11-07 01:12:58,460 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-11-07 01:12:58,466 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:12:58,466 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:12:58,517 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:12:58,523 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:12:58,523 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:12:58,579 INFO L276 IsEmpty]: Start isEmpty. Operand has 511 states, 509 states have (on average 1.7210216110019647) internal successors, (876), 510 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-07 01:12:58,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:58,599 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:58,600 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:12:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:58,606 INFO L85 PathProgramCache]: Analyzing trace with hash -803381674, now seen corresponding path program 1 times [2021-11-07 01:12:58,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:12:58,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302925042] [2021-11-07 01:12:58,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:58,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:12:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:59,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:12:59,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302925042] [2021-11-07 01:12:59,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302925042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:59,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:59,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:12:59,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520705585] [2021-11-07 01:13:00,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:00,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:00,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:00,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:00,022 INFO L87 Difference]: Start difference. First operand has 511 states, 509 states have (on average 1.7210216110019647) internal successors, (876), 510 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:00,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:00,336 INFO L93 Difference]: Finished difference Result 1502 states and 2577 transitions. [2021-11-07 01:13:00,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:13:00,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 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 211 [2021-11-07 01:13:00,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:00,371 INFO L225 Difference]: With dead ends: 1502 [2021-11-07 01:13:00,371 INFO L226 Difference]: Without dead ends: 996 [2021-11-07 01:13:00,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:13:00,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-11-07 01:13:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 994. [2021-11-07 01:13:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 1.4541792547834844) internal successors, (1444), 993 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1444 transitions. [2021-11-07 01:13:00,556 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1444 transitions. Word has length 211 [2021-11-07 01:13:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:00,559 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 1444 transitions. [2021-11-07 01:13:00,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1444 transitions. [2021-11-07 01:13:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-07 01:13:00,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:00,576 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] [2021-11-07 01:13:00,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:13:00,576 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:00,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:00,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1444229492, now seen corresponding path program 1 times [2021-11-07 01:13:00,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:00,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834804803] [2021-11-07 01:13:00,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:00,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:00,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:00,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834804803] [2021-11-07 01:13:00,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834804803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:00,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:00,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:00,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025166113] [2021-11-07 01:13:00,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:00,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:00,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:00,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:00,797 INFO L87 Difference]: Start difference. First operand 994 states and 1444 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 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) [2021-11-07 01:13:00,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:00,933 INFO L93 Difference]: Finished difference Result 1987 states and 2945 transitions. [2021-11-07 01:13:00,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:00,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 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 [2021-11-07 01:13:00,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:00,949 INFO L225 Difference]: With dead ends: 1987 [2021-11-07 01:13:00,950 INFO L226 Difference]: Without dead ends: 1341 [2021-11-07 01:13:00,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:00,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-11-07 01:13:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1183. [2021-11-07 01:13:01,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 1.478849407783418) internal successors, (1748), 1182 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1748 transitions. [2021-11-07 01:13:01,059 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1748 transitions. Word has length 213 [2021-11-07 01:13:01,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:01,063 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 1748 transitions. [2021-11-07 01:13:01,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 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) [2021-11-07 01:13:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1748 transitions. [2021-11-07 01:13:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-07 01:13:01,068 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:01,068 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] [2021-11-07 01:13:01,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:13:01,069 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:01,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1690887274, now seen corresponding path program 1 times [2021-11-07 01:13:01,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:01,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492640654] [2021-11-07 01:13:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:01,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:01,252 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:01,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492640654] [2021-11-07 01:13:01,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492640654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:01,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:01,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:01,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363986124] [2021-11-07 01:13:01,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:01,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:01,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:01,265 INFO L87 Difference]: Start difference. First operand 1183 states and 1748 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 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) [2021-11-07 01:13:01,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:01,453 INFO L93 Difference]: Finished difference Result 3380 states and 4978 transitions. [2021-11-07 01:13:01,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:01,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 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 [2021-11-07 01:13:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:01,472 INFO L225 Difference]: With dead ends: 3380 [2021-11-07 01:13:01,472 INFO L226 Difference]: Without dead ends: 2318 [2021-11-07 01:13:01,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:01,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-11-07 01:13:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2316. [2021-11-07 01:13:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 1.4725701943844491) internal successors, (3409), 2315 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3409 transitions. [2021-11-07 01:13:01,650 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3409 transitions. Word has length 213 [2021-11-07 01:13:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:01,652 INFO L470 AbstractCegarLoop]: Abstraction has 2316 states and 3409 transitions. [2021-11-07 01:13:01,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 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) [2021-11-07 01:13:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3409 transitions. [2021-11-07 01:13:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-07 01:13:01,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:01,660 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] [2021-11-07 01:13:01,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:13:01,660 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:01,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:01,661 INFO L85 PathProgramCache]: Analyzing trace with hash 121169893, now seen corresponding path program 1 times [2021-11-07 01:13:01,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:01,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292040638] [2021-11-07 01:13:01,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:01,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:01,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:01,759 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:01,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292040638] [2021-11-07 01:13:01,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292040638] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:01,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:01,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:01,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663901297] [2021-11-07 01:13:01,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:01,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:01,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:01,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:01,768 INFO L87 Difference]: Start difference. First operand 2316 states and 3409 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 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) [2021-11-07 01:13:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:02,048 INFO L93 Difference]: Finished difference Result 6796 states and 9994 transitions. [2021-11-07 01:13:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:02,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 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 [2021-11-07 01:13:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:02,078 INFO L225 Difference]: With dead ends: 6796 [2021-11-07 01:13:02,078 INFO L226 Difference]: Without dead ends: 4612 [2021-11-07 01:13:02,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:02,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2021-11-07 01:13:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 2319. [2021-11-07 01:13:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 1.4719585849870578) internal successors, (3412), 2318 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 3412 transitions. [2021-11-07 01:13:02,325 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 3412 transitions. Word has length 213 [2021-11-07 01:13:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:02,325 INFO L470 AbstractCegarLoop]: Abstraction has 2319 states and 3412 transitions. [2021-11-07 01:13:02,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 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) [2021-11-07 01:13:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 3412 transitions. [2021-11-07 01:13:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-07 01:13:02,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:02,335 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] [2021-11-07 01:13:02,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:13:02,336 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:02,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:02,336 INFO L85 PathProgramCache]: Analyzing trace with hash 515184596, now seen corresponding path program 1 times [2021-11-07 01:13:02,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:02,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232283949] [2021-11-07 01:13:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:02,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:02,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:02,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232283949] [2021-11-07 01:13:02,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232283949] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:02,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:02,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:13:02,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738797095] [2021-11-07 01:13:02,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:13:02,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:02,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:13:02,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:13:02,843 INFO L87 Difference]: Start difference. First operand 2319 states and 3412 transitions. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 4 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) [2021-11-07 01:13:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:03,318 INFO L93 Difference]: Finished difference Result 6733 states and 9899 transitions. [2021-11-07 01:13:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:13:03,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 4 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) Word has length 214 [2021-11-07 01:13:03,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:03,347 INFO L225 Difference]: With dead ends: 6733 [2021-11-07 01:13:03,347 INFO L226 Difference]: Without dead ends: 4429 [2021-11-07 01:13:03,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:13:03,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2021-11-07 01:13:03,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 4427. [2021-11-07 01:13:03,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 4426 states have (on average 1.4620424762765476) internal successors, (6471), 4426 states have internal predecessors, (6471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 6471 transitions. [2021-11-07 01:13:03,742 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 6471 transitions. Word has length 214 [2021-11-07 01:13:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:03,743 INFO L470 AbstractCegarLoop]: Abstraction has 4427 states and 6471 transitions. [2021-11-07 01:13:03,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 4 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) [2021-11-07 01:13:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 6471 transitions. [2021-11-07 01:13:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-07 01:13:03,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:03,753 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:03,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:13:03,754 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:03,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:03,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2128655524, now seen corresponding path program 1 times [2021-11-07 01:13:03,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:03,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684659006] [2021-11-07 01:13:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:03,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:04,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:04,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684659006] [2021-11-07 01:13:04,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684659006] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:04,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:04,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:04,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230048815] [2021-11-07 01:13:04,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:04,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:04,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:04,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:04,249 INFO L87 Difference]: Start difference. First operand 4427 states and 6471 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:05,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:05,131 INFO L93 Difference]: Finished difference Result 12778 states and 18635 transitions. [2021-11-07 01:13:05,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:13:05,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 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 215 [2021-11-07 01:13:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:05,182 INFO L225 Difference]: With dead ends: 12778 [2021-11-07 01:13:05,182 INFO L226 Difference]: Without dead ends: 8489 [2021-11-07 01:13:05,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:13:05,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8489 states. [2021-11-07 01:13:06,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8489 to 8487. [2021-11-07 01:13:06,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8487 states, 8486 states have (on average 1.4503888757954277) internal successors, (12308), 8486 states have internal predecessors, (12308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:06,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8487 states to 8487 states and 12308 transitions. [2021-11-07 01:13:06,094 INFO L78 Accepts]: Start accepts. Automaton has 8487 states and 12308 transitions. Word has length 215 [2021-11-07 01:13:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:06,095 INFO L470 AbstractCegarLoop]: Abstraction has 8487 states and 12308 transitions. [2021-11-07 01:13:06,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:06,095 INFO L276 IsEmpty]: Start isEmpty. Operand 8487 states and 12308 transitions. [2021-11-07 01:13:06,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-07 01:13:06,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:06,156 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:06,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:13:06,156 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:06,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1461741702, now seen corresponding path program 1 times [2021-11-07 01:13:06,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:06,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634952098] [2021-11-07 01:13:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:06,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:06,626 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:06,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634952098] [2021-11-07 01:13:06,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634952098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:06,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:06,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:06,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881937815] [2021-11-07 01:13:06,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:06,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:06,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:06,629 INFO L87 Difference]: Start difference. First operand 8487 states and 12308 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:08,194 INFO L93 Difference]: Finished difference Result 24867 states and 36003 transitions. [2021-11-07 01:13:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:13:08,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 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 217 [2021-11-07 01:13:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:08,278 INFO L225 Difference]: With dead ends: 24867 [2021-11-07 01:13:08,278 INFO L226 Difference]: Without dead ends: 16522 [2021-11-07 01:13:08,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:13:08,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16522 states. [2021-11-07 01:13:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16522 to 16520. [2021-11-07 01:13:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16520 states, 16519 states have (on average 1.43907016163206) internal successors, (23772), 16519 states have internal predecessors, (23772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16520 states to 16520 states and 23772 transitions. [2021-11-07 01:13:09,967 INFO L78 Accepts]: Start accepts. Automaton has 16520 states and 23772 transitions. Word has length 217 [2021-11-07 01:13:09,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:09,968 INFO L470 AbstractCegarLoop]: Abstraction has 16520 states and 23772 transitions. [2021-11-07 01:13:09,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 16520 states and 23772 transitions. [2021-11-07 01:13:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-07 01:13:10,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:10,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:10,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:13:10,004 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:10,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:10,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2121002204, now seen corresponding path program 1 times [2021-11-07 01:13:10,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:10,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644889380] [2021-11-07 01:13:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:10,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:10,098 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:10,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644889380] [2021-11-07 01:13:10,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644889380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:10,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:10,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:10,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203882088] [2021-11-07 01:13:10,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:10,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:10,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:10,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:10,102 INFO L87 Difference]: Start difference. First operand 16520 states and 23772 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:11,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:11,671 INFO L93 Difference]: Finished difference Result 34528 states and 51138 transitions. [2021-11-07 01:13:11,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:11,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 219 [2021-11-07 01:13:11,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:11,745 INFO L225 Difference]: With dead ends: 34528 [2021-11-07 01:13:11,745 INFO L226 Difference]: Without dead ends: 23154 [2021-11-07 01:13:11,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:11,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23154 states. [2021-11-07 01:13:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23154 to 21344. [2021-11-07 01:13:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21344 states, 21343 states have (on average 1.4741132924143747) internal successors, (31462), 21343 states have internal predecessors, (31462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21344 states to 21344 states and 31462 transitions. [2021-11-07 01:13:13,857 INFO L78 Accepts]: Start accepts. Automaton has 21344 states and 31462 transitions. Word has length 219 [2021-11-07 01:13:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:13,857 INFO L470 AbstractCegarLoop]: Abstraction has 21344 states and 31462 transitions. [2021-11-07 01:13:13,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 21344 states and 31462 transitions. [2021-11-07 01:13:13,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-07 01:13:13,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:13,894 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:13,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:13:13,894 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:13,895 INFO L85 PathProgramCache]: Analyzing trace with hash -2064173627, now seen corresponding path program 1 times [2021-11-07 01:13:13,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:13,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281496210] [2021-11-07 01:13:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:13,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:14,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:14,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281496210] [2021-11-07 01:13:14,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281496210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:14,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:14,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:14,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855869656] [2021-11-07 01:13:14,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:14,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:14,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:14,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:14,027 INFO L87 Difference]: Start difference. First operand 21344 states and 31462 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:16,491 INFO L93 Difference]: Finished difference Result 61419 states and 90331 transitions. [2021-11-07 01:13:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:16,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 219 [2021-11-07 01:13:16,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:16,612 INFO L225 Difference]: With dead ends: 61419 [2021-11-07 01:13:16,612 INFO L226 Difference]: Without dead ends: 41637 [2021-11-07 01:13:16,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41637 states. [2021-11-07 01:13:19,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41637 to 41635. [2021-11-07 01:13:19,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41635 states, 41634 states have (on average 1.4661814862852476) internal successors, (61043), 41634 states have internal predecessors, (61043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41635 states to 41635 states and 61043 transitions. [2021-11-07 01:13:19,762 INFO L78 Accepts]: Start accepts. Automaton has 41635 states and 61043 transitions. Word has length 219 [2021-11-07 01:13:19,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:19,763 INFO L470 AbstractCegarLoop]: Abstraction has 41635 states and 61043 transitions. [2021-11-07 01:13:19,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand 41635 states and 61043 transitions. [2021-11-07 01:13:19,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-07 01:13:19,825 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:19,825 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:19,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:13:19,826 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:19,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:19,827 INFO L85 PathProgramCache]: Analyzing trace with hash 527095815, now seen corresponding path program 1 times [2021-11-07 01:13:19,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:19,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146048999] [2021-11-07 01:13:19,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:19,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:19,901 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:19,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146048999] [2021-11-07 01:13:19,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146048999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:19,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:19,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:19,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311226816] [2021-11-07 01:13:19,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:13:19,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:19,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:13:19,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:19,905 INFO L87 Difference]: Start difference. First operand 41635 states and 61043 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:23,900 INFO L93 Difference]: Finished difference Result 122970 states and 180247 transitions. [2021-11-07 01:13:23,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:13:23,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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 219 [2021-11-07 01:13:23,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:24,104 INFO L225 Difference]: With dead ends: 122970 [2021-11-07 01:13:24,104 INFO L226 Difference]: Without dead ends: 83021 [2021-11-07 01:13:24,165 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:13:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83021 states. [2021-11-07 01:13:27,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83021 to 41668. [2021-11-07 01:13:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41668 states, 41667 states have (on average 1.465812273501812) internal successors, (61076), 41667 states have internal predecessors, (61076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41668 states to 41668 states and 61076 transitions. [2021-11-07 01:13:27,570 INFO L78 Accepts]: Start accepts. Automaton has 41668 states and 61076 transitions. Word has length 219 [2021-11-07 01:13:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:27,570 INFO L470 AbstractCegarLoop]: Abstraction has 41668 states and 61076 transitions. [2021-11-07 01:13:27,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 41668 states and 61076 transitions. [2021-11-07 01:13:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-07 01:13:27,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:27,649 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:27,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:13:27,650 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:27,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:27,650 INFO L85 PathProgramCache]: Analyzing trace with hash -932041510, now seen corresponding path program 1 times [2021-11-07 01:13:27,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:27,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154961031] [2021-11-07 01:13:27,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:27,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:28,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:28,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154961031] [2021-11-07 01:13:28,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154961031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:28,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:28,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:13:28,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647655244] [2021-11-07 01:13:28,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:13:28,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:28,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:13:28,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:13:28,043 INFO L87 Difference]: Start difference. First operand 41668 states and 61076 transitions. Second operand has 5 states, 5 states have (on average 44.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:13:33,127 INFO L93 Difference]: Finished difference Result 121607 states and 178195 transitions. [2021-11-07 01:13:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:13:33,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 44.0) internal successors, (220), 4 states have internal predecessors, (220), 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 220 [2021-11-07 01:13:33,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:13:33,294 INFO L225 Difference]: With dead ends: 121607 [2021-11-07 01:13:33,294 INFO L226 Difference]: Without dead ends: 80139 [2021-11-07 01:13:33,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:13:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80139 states. [2021-11-07 01:13:38,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80139 to 80137. [2021-11-07 01:13:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80137 states, 80136 states have (on average 1.458907357492263) internal successors, (116911), 80136 states have internal predecessors, (116911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80137 states to 80137 states and 116911 transitions. [2021-11-07 01:13:38,671 INFO L78 Accepts]: Start accepts. Automaton has 80137 states and 116911 transitions. Word has length 220 [2021-11-07 01:13:38,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:13:38,672 INFO L470 AbstractCegarLoop]: Abstraction has 80137 states and 116911 transitions. [2021-11-07 01:13:38,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:13:38,673 INFO L276 IsEmpty]: Start isEmpty. Operand 80137 states and 116911 transitions. [2021-11-07 01:13:38,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-11-07 01:13:38,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:13:38,744 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:13:38,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 01:13:38,745 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:13:38,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:13:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash 717517696, now seen corresponding path program 1 times [2021-11-07 01:13:38,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:13:38,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430524838] [2021-11-07 01:13:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:13:38,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:13:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:13:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:13:39,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:13:39,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430524838] [2021-11-07 01:13:39,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430524838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:13:39,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:13:39,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:13:39,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916478587] [2021-11-07 01:13:39,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:13:39,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:13:39,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:13:39,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:13:39,096 INFO L87 Difference]: Start difference. First operand 80137 states and 116911 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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)