./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.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_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/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_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/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_43cecc0f-99a6-4244-86dd-2043f967055c/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 4008c7bad6e9f0faf3cf745d811b7950453991ed3720a7122a910bf51077877c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:00:00,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:00:00,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:00:00,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:00:00,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:00:00,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:00:00,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:00:00,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:00:00,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:00:00,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:00:00,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:00:00,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:00:00,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:00:00,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:00:00,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:00:00,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:00:00,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:00:00,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:00:00,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:00:00,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:00:00,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:00:00,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:00:00,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:00:00,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:00:01,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:00:01,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:00:01,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:00:01,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:00:01,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:00:01,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:00:01,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:00:01,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:00:01,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:00:01,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:00:01,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:00:01,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:00:01,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:00:01,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:00:01,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:00:01,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:00:01,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:00:01,023 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:00:01,084 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:00:01,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:00:01,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:00:01,086 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:00:01,086 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:00:01,086 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:00:01,086 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:00:01,087 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:00:01,087 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:00:01,087 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:00:01,099 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:00:01,099 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:00:01,099 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:00:01,100 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:00:01,100 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:00:01,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:00:01,101 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:00:01,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:00:01,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:00:01,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:00:01,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:00:01,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:00:01,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:00:01,103 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:00:01,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:00:01,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:00:01,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:00:01,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:00:01,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:00:01,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:00:01,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:01,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:00:01,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:00:01,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:00:01,108 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:00:01,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:00:01,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:00:01,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:00:01,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:00:01,109 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_43cecc0f-99a6-4244-86dd-2043f967055c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4008c7bad6e9f0faf3cf745d811b7950453991ed3720a7122a910bf51077877c [2021-11-07 02:00:01,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:00:01,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:00:01,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:00:01,405 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:00:01,406 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:00:01,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-07 02:00:01,501 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/data/0d454abd5/fea487beb82e4b9bb1c382546cb22683/FLAG4c54d7a69 [2021-11-07 02:00:02,090 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:00:02,091 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-07 02:00:02,106 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/data/0d454abd5/fea487beb82e4b9bb1c382546cb22683/FLAG4c54d7a69 [2021-11-07 02:00:02,389 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/data/0d454abd5/fea487beb82e4b9bb1c382546cb22683 [2021-11-07 02:00:02,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:00:02,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:00:02,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:02,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:00:02,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:00:02,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:02" (1/1) ... [2021-11-07 02:00:02,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ac2dcf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:02, skipping insertion in model container [2021-11-07 02:00:02,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:00:02" (1/1) ... [2021-11-07 02:00:02,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:00:02,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:00:02,819 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_43cecc0f-99a6-4244-86dd-2043f967055c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10525,10538] [2021-11-07 02:00:02,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:02,920 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:00:03,030 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_43cecc0f-99a6-4244-86dd-2043f967055c/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c[10525,10538] [2021-11-07 02:00:03,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:00:03,105 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:00:03,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:03 WrapperNode [2021-11-07 02:00:03,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:00:03,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:00:03,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:00:03,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:00:03,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:03" (1/1) ... [2021-11-07 02:00:03,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:03" (1/1) ... [2021-11-07 02:00:03,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:00:03,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:00:03,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:00:03,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:00:03,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:03" (1/1) ... [2021-11-07 02:00:03,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:03" (1/1) ... [2021-11-07 02:00:03,231 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:03" (1/1) ... [2021-11-07 02:00:03,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:03" (1/1) ... [2021-11-07 02:00:03,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:03" (1/1) ... [2021-11-07 02:00:03,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:03" (1/1) ... [2021-11-07 02:00:03,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:03" (1/1) ... [2021-11-07 02:00:03,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:00:03,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:00:03,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:00:03,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:00:03,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:03" (1/1) ... [2021-11-07 02:00:03,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:00:03,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:00:03,344 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:00:03,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:00:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:00:03,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:00:03,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:00:03,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:00:05,061 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:00:05,061 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 02:00:05,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:00:05 BoogieIcfgContainer [2021-11-07 02:00:05,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:00:05,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:00:05,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:00:05,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:00:05,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:00:02" (1/3) ... [2021-11-07 02:00:05,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f377a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:00:05, skipping insertion in model container [2021-11-07 02:00:05,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:00:03" (2/3) ... [2021-11-07 02:00:05,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f377a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:00:05, skipping insertion in model container [2021-11-07 02:00:05,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:00:05" (3/3) ... [2021-11-07 02:00:05,075 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals.c.v+nlh-reducer.c [2021-11-07 02:00:05,081 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:00:05,082 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:00:05,161 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:00:05,169 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:00:05,169 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:00:05,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.7724137931034483) internal successors, (257), 146 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-07 02:00:05,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:05,217 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] [2021-11-07 02:00:05,217 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:05,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:05,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1020781982, now seen corresponding path program 1 times [2021-11-07 02:00:05,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:00:05,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244399822] [2021-11-07 02:00:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:05,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:00:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:05,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:05,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:00:05,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244399822] [2021-11-07 02:00:05,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244399822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:05,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:05,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:00:05,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077127399] [2021-11-07 02:00:05,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:00:05,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:00:05,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:00:05,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:00:05,821 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.7724137931034483) internal successors, (257), 146 states have internal predecessors, (257), 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 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:06,138 INFO L93 Difference]: Finished difference Result 242 states and 405 transitions. [2021-11-07 02:00:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:00:06,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 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 93 [2021-11-07 02:00:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:06,157 INFO L225 Difference]: With dead ends: 242 [2021-11-07 02:00:06,157 INFO L226 Difference]: Without dead ends: 145 [2021-11-07 02:00:06,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:00:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-07 02:00:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-07 02:00:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2083333333333333) internal successors, (174), 144 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 174 transitions. [2021-11-07 02:00:06,210 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 174 transitions. Word has length 93 [2021-11-07 02:00:06,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:06,211 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 174 transitions. [2021-11-07 02:00:06,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:06,211 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 174 transitions. [2021-11-07 02:00:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 02:00:06,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:06,216 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] [2021-11-07 02:00:06,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:00:06,217 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:06,218 INFO L85 PathProgramCache]: Analyzing trace with hash 63022168, now seen corresponding path program 1 times [2021-11-07 02:00:06,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:00:06,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945970928] [2021-11-07 02:00:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:06,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:00:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:06,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:00:06,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945970928] [2021-11-07 02:00:06,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945970928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:06,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:06,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:00:06,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336744974] [2021-11-07 02:00:06,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:00:06,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:00:06,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:00:06,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:00:06,476 INFO L87 Difference]: Start difference. First operand 145 states and 174 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:06,674 INFO L93 Difference]: Finished difference Result 218 states and 272 transitions. [2021-11-07 02:00:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:00:06,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 94 [2021-11-07 02:00:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:06,677 INFO L225 Difference]: With dead ends: 218 [2021-11-07 02:00:06,677 INFO L226 Difference]: Without dead ends: 145 [2021-11-07 02:00:06,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:00:06,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-07 02:00:06,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-07 02:00:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 144 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 172 transitions. [2021-11-07 02:00:06,698 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 172 transitions. Word has length 94 [2021-11-07 02:00:06,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:06,699 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 172 transitions. [2021-11-07 02:00:06,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 172 transitions. [2021-11-07 02:00:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-07 02:00:06,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:06,704 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] [2021-11-07 02:00:06,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 02:00:06,705 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:06,705 INFO L85 PathProgramCache]: Analyzing trace with hash -548286174, now seen corresponding path program 1 times [2021-11-07 02:00:06,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:00:06,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109144975] [2021-11-07 02:00:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:06,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:00:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:06,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:00:06,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109144975] [2021-11-07 02:00:06,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109144975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:06,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:06,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:00:06,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492904309] [2021-11-07 02:00:06,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:00:06,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:00:06,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:00:06,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:00:06,920 INFO L87 Difference]: Start difference. First operand 145 states and 172 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:07,117 INFO L93 Difference]: Finished difference Result 226 states and 278 transitions. [2021-11-07 02:00:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:00:07,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 95 [2021-11-07 02:00:07,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:07,125 INFO L225 Difference]: With dead ends: 226 [2021-11-07 02:00:07,126 INFO L226 Difference]: Without dead ends: 145 [2021-11-07 02:00:07,127 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:00:07,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-07 02:00:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-07 02:00:07,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1805555555555556) internal successors, (170), 144 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 170 transitions. [2021-11-07 02:00:07,162 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 170 transitions. Word has length 95 [2021-11-07 02:00:07,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:07,163 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 170 transitions. [2021-11-07 02:00:07,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:07,163 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 170 transitions. [2021-11-07 02:00:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 02:00:07,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:07,166 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] [2021-11-07 02:00:07,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 02:00:07,166 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:07,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1530571160, now seen corresponding path program 1 times [2021-11-07 02:00:07,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:00:07,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509823436] [2021-11-07 02:00:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:07,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:00:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:07,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:00:07,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509823436] [2021-11-07 02:00:07,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509823436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:07,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:07,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:00:07,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085391858] [2021-11-07 02:00:07,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:00:07,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:00:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:00:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:00:07,366 INFO L87 Difference]: Start difference. First operand 145 states and 170 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:07,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:07,532 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2021-11-07 02:00:07,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:00:07,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 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 96 [2021-11-07 02:00:07,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:07,537 INFO L225 Difference]: With dead ends: 222 [2021-11-07 02:00:07,538 INFO L226 Difference]: Without dead ends: 145 [2021-11-07 02:00:07,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:00:07,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-07 02:00:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-07 02:00:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1666666666666667) internal successors, (168), 144 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2021-11-07 02:00:07,575 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 96 [2021-11-07 02:00:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:07,576 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2021-11-07 02:00:07,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2021-11-07 02:00:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-07 02:00:07,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:07,584 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] [2021-11-07 02:00:07,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 02:00:07,585 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:07,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:07,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1704898730, now seen corresponding path program 1 times [2021-11-07 02:00:07,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:00:07,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738412177] [2021-11-07 02:00:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:07,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:00:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:07,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:00:07,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738412177] [2021-11-07 02:00:07,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738412177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:07,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:07,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:00:07,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452641092] [2021-11-07 02:00:07,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:00:07,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:00:07,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:00:07,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:00:07,733 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:07,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:07,887 INFO L93 Difference]: Finished difference Result 230 states and 275 transitions. [2021-11-07 02:00:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:00:07,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 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 97 [2021-11-07 02:00:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:07,890 INFO L225 Difference]: With dead ends: 230 [2021-11-07 02:00:07,890 INFO L226 Difference]: Without dead ends: 145 [2021-11-07 02:00:07,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:00:07,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-07 02:00:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-07 02:00:07,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 144 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2021-11-07 02:00:07,906 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 97 [2021-11-07 02:00:07,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:07,907 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2021-11-07 02:00:07,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2021-11-07 02:00:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 02:00:07,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:07,909 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] [2021-11-07 02:00:07,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 02:00:07,910 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:07,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:07,911 INFO L85 PathProgramCache]: Analyzing trace with hash 608209088, now seen corresponding path program 1 times [2021-11-07 02:00:07,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:00:07,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673166118] [2021-11-07 02:00:07,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:07,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:00:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:08,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:00:08,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673166118] [2021-11-07 02:00:08,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673166118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:08,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:08,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:00:08,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791350572] [2021-11-07 02:00:08,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:00:08,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:00:08,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:00:08,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:00:08,009 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:08,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:08,173 INFO L93 Difference]: Finished difference Result 210 states and 250 transitions. [2021-11-07 02:00:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:00:08,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 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 98 [2021-11-07 02:00:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:08,175 INFO L225 Difference]: With dead ends: 210 [2021-11-07 02:00:08,175 INFO L226 Difference]: Without dead ends: 145 [2021-11-07 02:00:08,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:00:08,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-07 02:00:08,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-07 02:00:08,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1388888888888888) internal successors, (164), 144 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:08,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 164 transitions. [2021-11-07 02:00:08,200 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 164 transitions. Word has length 98 [2021-11-07 02:00:08,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:08,201 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 164 transitions. [2021-11-07 02:00:08,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 164 transitions. [2021-11-07 02:00:08,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 02:00:08,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:08,202 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] [2021-11-07 02:00:08,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 02:00:08,203 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash -893794886, now seen corresponding path program 1 times [2021-11-07 02:00:08,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:00:08,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938491641] [2021-11-07 02:00:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:08,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:00:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:08,319 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:00:08,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938491641] [2021-11-07 02:00:08,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938491641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:08,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:08,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:00:08,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173077276] [2021-11-07 02:00:08,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:00:08,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:00:08,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:00:08,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:00:08,322 INFO L87 Difference]: Start difference. First operand 145 states and 164 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:08,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:08,444 INFO L93 Difference]: Finished difference Result 214 states and 251 transitions. [2021-11-07 02:00:08,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:00:08,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 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 99 [2021-11-07 02:00:08,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:08,446 INFO L225 Difference]: With dead ends: 214 [2021-11-07 02:00:08,446 INFO L226 Difference]: Without dead ends: 145 [2021-11-07 02:00:08,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:00:08,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-07 02:00:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-07 02:00:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.125) internal successors, (162), 144 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2021-11-07 02:00:08,464 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 99 [2021-11-07 02:00:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:08,470 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2021-11-07 02:00:08,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2021-11-07 02:00:08,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 02:00:08,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:08,478 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] [2021-11-07 02:00:08,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 02:00:08,478 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:08,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1409225868, now seen corresponding path program 1 times [2021-11-07 02:00:08,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:00:08,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101462215] [2021-11-07 02:00:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:08,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:00:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:00:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:00:30,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:00:30,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101462215] [2021-11-07 02:00:30,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101462215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:00:30,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:00:30,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-11-07 02:00:30,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336084425] [2021-11-07 02:00:30,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-07 02:00:30,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:00:30,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-07 02:00:30,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2335, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 02:00:30,896 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:56,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:00:56,373 INFO L93 Difference]: Finished difference Result 298 states and 364 transitions. [2021-11-07 02:00:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 02:00:56,374 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 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 100 [2021-11-07 02:00:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:00:56,378 INFO L225 Difference]: With dead ends: 298 [2021-11-07 02:00:56,378 INFO L226 Difference]: Without dead ends: 246 [2021-11-07 02:00:56,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=1745, Invalid=5911, Unknown=0, NotChecked=0, Total=7656 [2021-11-07 02:00:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-07 02:00:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 242. [2021-11-07 02:00:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.2074688796680497) internal successors, (291), 241 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 291 transitions. [2021-11-07 02:00:56,419 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 291 transitions. Word has length 100 [2021-11-07 02:00:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:00:56,420 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 291 transitions. [2021-11-07 02:00:56,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:00:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 291 transitions. [2021-11-07 02:00:56,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 02:00:56,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:00:56,423 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] [2021-11-07 02:00:56,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 02:00:56,423 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:00:56,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:00:56,424 INFO L85 PathProgramCache]: Analyzing trace with hash -110709160, now seen corresponding path program 1 times [2021-11-07 02:00:56,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:00:56,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527099235] [2021-11-07 02:00:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:00:56,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:00:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:17,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:17,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527099235] [2021-11-07 02:01:17,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527099235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:17,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:17,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-11-07 02:01:17,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292298993] [2021-11-07 02:01:17,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-07 02:01:17,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:17,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-07 02:01:17,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2426, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 02:01:17,419 INFO L87 Difference]: Start difference. First operand 242 states and 291 transitions. Second operand has 52 states, 52 states have (on average 1.9615384615384615) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:46,907 INFO L93 Difference]: Finished difference Result 500 states and 633 transitions. [2021-11-07 02:01:46,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 02:01:46,908 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9615384615384615) internal successors, (102), 51 states have internal predecessors, (102), 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 102 [2021-11-07 02:01:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:46,911 INFO L225 Difference]: With dead ends: 500 [2021-11-07 02:01:46,911 INFO L226 Difference]: Without dead ends: 351 [2021-11-07 02:01:46,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=1776, Invalid=6234, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 02:01:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-07 02:01:46,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 344. [2021-11-07 02:01:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.2419825072886297) internal successors, (426), 343 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 426 transitions. [2021-11-07 02:01:46,973 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 426 transitions. Word has length 102 [2021-11-07 02:01:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:46,974 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 426 transitions. [2021-11-07 02:01:46,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9615384615384615) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:46,974 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 426 transitions. [2021-11-07 02:01:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 02:01:46,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:46,976 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] [2021-11-07 02:01:46,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 02:01:46,976 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:46,977 INFO L85 PathProgramCache]: Analyzing trace with hash -338848638, now seen corresponding path program 1 times [2021-11-07 02:01:46,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:46,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864360516] [2021-11-07 02:01:46,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:46,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:47,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:47,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864360516] [2021-11-07 02:01:47,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864360516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:47,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:47,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:01:47,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067426062] [2021-11-07 02:01:47,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:01:47,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:47,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:01:47,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:47,110 INFO L87 Difference]: Start difference. First operand 344 states and 426 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:47,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:47,193 INFO L93 Difference]: Finished difference Result 740 states and 951 transitions. [2021-11-07 02:01:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:01:47,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 102 [2021-11-07 02:01:47,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:47,197 INFO L225 Difference]: With dead ends: 740 [2021-11-07 02:01:47,197 INFO L226 Difference]: Without dead ends: 491 [2021-11-07 02:01:47,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:01:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-11-07 02:01:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 489. [2021-11-07 02:01:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.2622950819672132) internal successors, (616), 488 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 616 transitions. [2021-11-07 02:01:47,264 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 616 transitions. Word has length 102 [2021-11-07 02:01:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:47,264 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 616 transitions. [2021-11-07 02:01:47,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 616 transitions. [2021-11-07 02:01:47,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 02:01:47,266 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:47,266 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] [2021-11-07 02:01:47,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 02:01:47,267 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:47,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:47,267 INFO L85 PathProgramCache]: Analyzing trace with hash 876059039, now seen corresponding path program 1 times [2021-11-07 02:01:47,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:47,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162805335] [2021-11-07 02:01:47,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:47,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:47,361 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:47,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162805335] [2021-11-07 02:01:47,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162805335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:47,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:47,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 02:01:47,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481222577] [2021-11-07 02:01:47,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:01:47,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:47,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:01:47,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:01:47,365 INFO L87 Difference]: Start difference. First operand 489 states and 616 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:47,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:47,556 INFO L93 Difference]: Finished difference Result 871 states and 1118 transitions. [2021-11-07 02:01:47,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:01:47,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 103 [2021-11-07 02:01:47,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:47,562 INFO L225 Difference]: With dead ends: 871 [2021-11-07 02:01:47,562 INFO L226 Difference]: Without dead ends: 722 [2021-11-07 02:01:47,563 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:01:47,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-11-07 02:01:47,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 438. [2021-11-07 02:01:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.2494279176201373) internal successors, (546), 437 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 546 transitions. [2021-11-07 02:01:47,630 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 546 transitions. Word has length 103 [2021-11-07 02:01:47,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:47,630 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 546 transitions. [2021-11-07 02:01:47,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:47,631 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 546 transitions. [2021-11-07 02:01:47,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 02:01:47,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:47,633 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:47,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 02:01:47,633 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:47,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1649938, now seen corresponding path program 1 times [2021-11-07 02:01:47,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:47,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778446856] [2021-11-07 02:01:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:47,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:47,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:47,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778446856] [2021-11-07 02:01:47,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778446856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:47,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:47,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:47,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539523534] [2021-11-07 02:01:47,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:47,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:47,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:47,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:47,727 INFO L87 Difference]: Start difference. First operand 438 states and 546 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:47,827 INFO L93 Difference]: Finished difference Result 776 states and 989 transitions. [2021-11-07 02:01:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:47,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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 122 [2021-11-07 02:01:47,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:47,831 INFO L225 Difference]: With dead ends: 776 [2021-11-07 02:01:47,831 INFO L226 Difference]: Without dead ends: 532 [2021-11-07 02:01:47,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:47,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-07 02:01:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 510. [2021-11-07 02:01:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 1.2514734774066798) internal successors, (637), 509 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 637 transitions. [2021-11-07 02:01:47,907 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 637 transitions. Word has length 122 [2021-11-07 02:01:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:47,908 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 637 transitions. [2021-11-07 02:01:47,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:47,908 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 637 transitions. [2021-11-07 02:01:47,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 02:01:47,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:47,911 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:47,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 02:01:47,911 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:47,912 INFO L85 PathProgramCache]: Analyzing trace with hash 115641772, now seen corresponding path program 1 times [2021-11-07 02:01:47,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:47,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564679908] [2021-11-07 02:01:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:47,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:47,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:47,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564679908] [2021-11-07 02:01:47,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564679908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:47,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:47,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:47,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343109543] [2021-11-07 02:01:47,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:47,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:47,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:47,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:47,996 INFO L87 Difference]: Start difference. First operand 510 states and 637 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:48,107 INFO L93 Difference]: Finished difference Result 1025 states and 1315 transitions. [2021-11-07 02:01:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:48,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 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 125 [2021-11-07 02:01:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:48,112 INFO L225 Difference]: With dead ends: 1025 [2021-11-07 02:01:48,112 INFO L226 Difference]: Without dead ends: 722 [2021-11-07 02:01:48,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-11-07 02:01:48,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 692. [2021-11-07 02:01:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.264833574529667) internal successors, (874), 691 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 874 transitions. [2021-11-07 02:01:48,229 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 874 transitions. Word has length 125 [2021-11-07 02:01:48,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:48,229 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 874 transitions. [2021-11-07 02:01:48,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:48,230 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 874 transitions. [2021-11-07 02:01:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 02:01:48,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:48,231 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:48,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 02:01:48,232 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:48,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:48,232 INFO L85 PathProgramCache]: Analyzing trace with hash 418025434, now seen corresponding path program 1 times [2021-11-07 02:01:48,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:48,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578885553] [2021-11-07 02:01:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:48,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:48,304 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:48,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578885553] [2021-11-07 02:01:48,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578885553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:48,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:48,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:48,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242253406] [2021-11-07 02:01:48,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:48,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:48,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:48,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:48,306 INFO L87 Difference]: Start difference. First operand 692 states and 874 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:48,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:48,464 INFO L93 Difference]: Finished difference Result 1577 states and 2036 transitions. [2021-11-07 02:01:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:48,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 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 128 [2021-11-07 02:01:48,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:48,471 INFO L225 Difference]: With dead ends: 1577 [2021-11-07 02:01:48,472 INFO L226 Difference]: Without dead ends: 1098 [2021-11-07 02:01:48,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-11-07 02:01:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1056. [2021-11-07 02:01:48,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 1.276777251184834) internal successors, (1347), 1055 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1347 transitions. [2021-11-07 02:01:48,643 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1347 transitions. Word has length 128 [2021-11-07 02:01:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:48,644 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1347 transitions. [2021-11-07 02:01:48,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:48,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1347 transitions. [2021-11-07 02:01:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 02:01:48,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:48,646 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:48,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 02:01:48,646 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:48,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:48,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2112775816, now seen corresponding path program 1 times [2021-11-07 02:01:48,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:48,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48325412] [2021-11-07 02:01:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:48,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:48,739 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:48,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48325412] [2021-11-07 02:01:48,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48325412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:48,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:48,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:48,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206238917] [2021-11-07 02:01:48,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:48,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:48,742 INFO L87 Difference]: Start difference. First operand 1056 states and 1347 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:49,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:49,021 INFO L93 Difference]: Finished difference Result 2675 states and 3465 transitions. [2021-11-07 02:01:49,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:49,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 131 [2021-11-07 02:01:49,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:49,032 INFO L225 Difference]: With dead ends: 2675 [2021-11-07 02:01:49,033 INFO L226 Difference]: Without dead ends: 1838 [2021-11-07 02:01:49,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-11-07 02:01:49,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1772. [2021-11-07 02:01:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 1.2840203274985884) internal successors, (2274), 1771 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2274 transitions. [2021-11-07 02:01:49,323 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2274 transitions. Word has length 131 [2021-11-07 02:01:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:49,324 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 2274 transitions. [2021-11-07 02:01:49,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2274 transitions. [2021-11-07 02:01:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 02:01:49,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:49,326 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:49,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 02:01:49,326 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:49,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash 440753557, now seen corresponding path program 1 times [2021-11-07 02:01:49,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:49,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876603402] [2021-11-07 02:01:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:49,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:49,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:49,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876603402] [2021-11-07 02:01:49,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876603402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:49,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:49,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:49,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604264272] [2021-11-07 02:01:49,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:49,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:49,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:49,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:49,413 INFO L87 Difference]: Start difference. First operand 1772 states and 2274 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:49,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:49,905 INFO L93 Difference]: Finished difference Result 4829 states and 6256 transitions. [2021-11-07 02:01:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:49,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 134 [2021-11-07 02:01:49,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:49,925 INFO L225 Difference]: With dead ends: 4829 [2021-11-07 02:01:49,925 INFO L226 Difference]: Without dead ends: 3282 [2021-11-07 02:01:49,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3282 states. [2021-11-07 02:01:50,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3282 to 3168. [2021-11-07 02:01:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3168 states, 3167 states have (on average 1.2860751499842122) internal successors, (4073), 3167 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:50,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3168 states to 3168 states and 4073 transitions. [2021-11-07 02:01:50,531 INFO L78 Accepts]: Start accepts. Automaton has 3168 states and 4073 transitions. Word has length 134 [2021-11-07 02:01:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:50,531 INFO L470 AbstractCegarLoop]: Abstraction has 3168 states and 4073 transitions. [2021-11-07 02:01:50,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:50,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3168 states and 4073 transitions. [2021-11-07 02:01:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 02:01:50,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:50,534 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:50,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 02:01:50,535 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:50,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:50,535 INFO L85 PathProgramCache]: Analyzing trace with hash -894697835, now seen corresponding path program 1 times [2021-11-07 02:01:50,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:50,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495499511] [2021-11-07 02:01:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:50,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:50,636 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:50,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495499511] [2021-11-07 02:01:50,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495499511] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:50,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:50,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:50,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930673535] [2021-11-07 02:01:50,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:50,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:50,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:50,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:50,639 INFO L87 Difference]: Start difference. First operand 3168 states and 4073 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:51,600 INFO L93 Difference]: Finished difference Result 9023 states and 11663 transitions. [2021-11-07 02:01:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:51,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 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 137 [2021-11-07 02:01:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:51,633 INFO L225 Difference]: With dead ends: 9023 [2021-11-07 02:01:51,633 INFO L226 Difference]: Without dead ends: 6086 [2021-11-07 02:01:51,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:51,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-11-07 02:01:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5876. [2021-11-07 02:01:52,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5876 states, 5875 states have (on average 1.2840851063829788) internal successors, (7544), 5875 states have internal predecessors, (7544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5876 states to 5876 states and 7544 transitions. [2021-11-07 02:01:52,710 INFO L78 Accepts]: Start accepts. Automaton has 5876 states and 7544 transitions. Word has length 137 [2021-11-07 02:01:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:52,711 INFO L470 AbstractCegarLoop]: Abstraction has 5876 states and 7544 transitions. [2021-11-07 02:01:52,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5876 states and 7544 transitions. [2021-11-07 02:01:52,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 02:01:52,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:52,713 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:52,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 02:01:52,714 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:52,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:52,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1901318330, now seen corresponding path program 1 times [2021-11-07 02:01:52,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:52,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744752724] [2021-11-07 02:01:52,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:52,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:01:52,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:52,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744752724] [2021-11-07 02:01:52,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744752724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:52,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:52,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:52,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450710855] [2021-11-07 02:01:52,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:52,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:52,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:52,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:52,796 INFO L87 Difference]: Start difference. First operand 5876 states and 7544 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:54,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:54,339 INFO L93 Difference]: Finished difference Result 17379 states and 22374 transitions. [2021-11-07 02:01:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:54,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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 142 [2021-11-07 02:01:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:54,414 INFO L225 Difference]: With dead ends: 17379 [2021-11-07 02:01:54,415 INFO L226 Difference]: Without dead ends: 11641 [2021-11-07 02:01:54,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11641 states. [2021-11-07 02:01:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11641 to 11235. [2021-11-07 02:01:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11235 states, 11234 states have (on average 1.2789745415702332) internal successors, (14368), 11234 states have internal predecessors, (14368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11235 states to 11235 states and 14368 transitions. [2021-11-07 02:01:55,927 INFO L78 Accepts]: Start accepts. Automaton has 11235 states and 14368 transitions. Word has length 142 [2021-11-07 02:01:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:55,927 INFO L470 AbstractCegarLoop]: Abstraction has 11235 states and 14368 transitions. [2021-11-07 02:01:55,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 11235 states and 14368 transitions. [2021-11-07 02:01:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-07 02:01:55,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:55,930 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:55,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 02:01:55,930 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:55,931 INFO L85 PathProgramCache]: Analyzing trace with hash 312188249, now seen corresponding path program 1 times [2021-11-07 02:01:55,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:55,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130362569] [2021-11-07 02:01:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:55,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:01:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:01:55,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:01:55,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130362569] [2021-11-07 02:01:55,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130362569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:01:55,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:01:55,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 02:01:55,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38571306] [2021-11-07 02:01:55,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:01:55,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:01:55,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:01:55,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:55,999 INFO L87 Difference]: Start difference. First operand 11235 states and 14368 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:57,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:01:57,478 INFO L93 Difference]: Finished difference Result 22295 states and 28548 transitions. [2021-11-07 02:01:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:01:57,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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 145 [2021-11-07 02:01:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:01:57,508 INFO L225 Difference]: With dead ends: 22295 [2021-11-07 02:01:57,508 INFO L226 Difference]: Without dead ends: 11194 [2021-11-07 02:01:57,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:01:57,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11194 states. [2021-11-07 02:01:58,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11194 to 9504. [2021-11-07 02:01:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9504 states, 9503 states have (on average 1.2672840155740293) internal successors, (12043), 9503 states have internal predecessors, (12043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9504 states to 9504 states and 12043 transitions. [2021-11-07 02:01:58,701 INFO L78 Accepts]: Start accepts. Automaton has 9504 states and 12043 transitions. Word has length 145 [2021-11-07 02:01:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:01:58,701 INFO L470 AbstractCegarLoop]: Abstraction has 9504 states and 12043 transitions. [2021-11-07 02:01:58,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:01:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 9504 states and 12043 transitions. [2021-11-07 02:01:58,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-07 02:01:58,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:01:58,705 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:01:58,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 02:01:58,706 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:01:58,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:01:58,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1571198607, now seen corresponding path program 1 times [2021-11-07 02:01:58,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:01:58,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386608099] [2021-11-07 02:01:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:01:58,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:01:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:44,142 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:04:44,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386608099] [2021-11-07 02:04:44,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386608099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:04:44,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985367570] [2021-11-07 02:04:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:44,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:04:44,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:04:44,145 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:04:44,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43cecc0f-99a6-4244-86dd-2043f967055c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 02:04:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:45,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 186 conjunts are in the unsatisfiable core [2021-11-07 02:04:45,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:28,164 WARN L207 SmtUtils]: Spent 13.37 s on a formula simplification that was a NOOP. DAG size: 277