./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+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V --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 2b8cc349a19a972b0be64ea80cb0d8ffd687af01d6d76bd436b271bb666f9a3a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:27:11,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:27:11,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:27:11,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:27:11,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:27:11,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:27:11,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:27:11,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:27:11,402 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:27:11,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:27:11,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:27:11,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:27:11,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:27:11,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:27:11,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:27:11,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:27:11,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:27:11,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:27:11,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:27:11,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:27:11,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:27:11,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:27:11,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:27:11,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:27:11,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:27:11,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:27:11,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:27:11,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:27:11,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:27:11,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:27:11,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:27:11,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:27:11,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:27:11,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:27:11,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:27:11,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:27:11,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:27:11,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:27:11,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:27:11,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:27:11,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:27:11,487 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:27:11,542 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:27:11,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:27:11,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:27:11,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:27:11,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:27:11,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:27:11,546 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:27:11,546 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:27:11,546 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:27:11,546 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:27:11,548 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:27:11,548 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:27:11,548 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:27:11,549 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:27:11,549 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:27:11,549 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:27:11,550 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:27:11,550 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:27:11,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:27:11,551 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:27:11,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:27:11,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:27:11,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:27:11,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:27:11,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:27:11,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:27:11,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:27:11,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:27:11,554 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:27:11,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:27:11,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:27:11,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:27:11,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:11,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:27:11,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:27:11,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:27:11,557 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:27:11,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:27:11,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:27:11,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:27:11,558 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:27:11,558 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_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b8cc349a19a972b0be64ea80cb0d8ffd687af01d6d76bd436b271bb666f9a3a [2021-11-23 02:27:11,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:27:11,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:27:11,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:27:11,977 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:27:11,986 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:27:11,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2021-11-23 02:27:12,086 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/data/1ce93860a/aa126af066f24096a3422b64195b8295/FLAG14fb9b604 [2021-11-23 02:27:12,756 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:27:12,757 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2021-11-23 02:27:12,771 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/data/1ce93860a/aa126af066f24096a3422b64195b8295/FLAG14fb9b604 [2021-11-23 02:27:13,028 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/data/1ce93860a/aa126af066f24096a3422b64195b8295 [2021-11-23 02:27:13,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:27:13,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:27:13,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:13,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:27:13,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:27:13,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:13" (1/1) ... [2021-11-23 02:27:13,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@255a62c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:13, skipping insertion in model container [2021-11-23 02:27:13,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:27:13" (1/1) ... [2021-11-23 02:27:13,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:27:13,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:27:13,610 WARN L230 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_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c[7631,7644] [2021-11-23 02:27:13,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:13,679 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:27:13,774 WARN L230 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_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c[7631,7644] [2021-11-23 02:27:13,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:27:13,869 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:27:13,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:13 WrapperNode [2021-11-23 02:27:13,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:27:13,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:13,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:27:13,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:27:13,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:13" (1/1) ... [2021-11-23 02:27:13,897 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:13" (1/1) ... [2021-11-23 02:27:13,955 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 576 [2021-11-23 02:27:13,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:27:13,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:27:13,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:27:13,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:27:13,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:13" (1/1) ... [2021-11-23 02:27:13,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:13" (1/1) ... [2021-11-23 02:27:13,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:13" (1/1) ... [2021-11-23 02:27:13,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:13" (1/1) ... [2021-11-23 02:27:13,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:13" (1/1) ... [2021-11-23 02:27:14,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:13" (1/1) ... [2021-11-23 02:27:14,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:13" (1/1) ... [2021-11-23 02:27:14,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:27:14,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:27:14,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:27:14,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:27:14,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:13" (1/1) ... [2021-11-23 02:27:14,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:27:14,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:27:14,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:27:14,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:27:14,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:27:14,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:27:14,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:27:14,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:27:14,275 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:27:14,276 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:27:15,173 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:27:15,419 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:27:15,420 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:27:15,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:15 BoogieIcfgContainer [2021-11-23 02:27:15,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:27:15,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:27:15,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:27:15,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:27:15,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:27:13" (1/3) ... [2021-11-23 02:27:15,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e82e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:15, skipping insertion in model container [2021-11-23 02:27:15,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:27:13" (2/3) ... [2021-11-23 02:27:15,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e82e36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:27:15, skipping insertion in model container [2021-11-23 02:27:15,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:27:15" (3/3) ... [2021-11-23 02:27:15,442 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2021-11-23 02:27:15,456 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:27:15,456 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:27:15,538 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:27:15,547 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 [2021-11-23 02:27:15,548 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:27:15,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 1.7572815533980584) internal successors, (181), 104 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:15,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:27:15,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:15,604 INFO L514 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] [2021-11-23 02:27:15,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:15,611 INFO L85 PathProgramCache]: Analyzing trace with hash 109996252, now seen corresponding path program 1 times [2021-11-23 02:27:15,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:15,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522305050] [2021-11-23 02:27:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:15,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:16,128 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:16,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522305050] [2021-11-23 02:27:16,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522305050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:16,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:16,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:16,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432434217] [2021-11-23 02:27:16,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:16,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:16,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:16,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:16,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:16,194 INFO L87 Difference]: Start difference. First operand has 105 states, 103 states have (on average 1.7572815533980584) internal successors, (181), 104 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:16,390 INFO L93 Difference]: Finished difference Result 207 states and 331 transitions. [2021-11-23 02:27:16,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:16,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-11-23 02:27:16,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:16,413 INFO L225 Difference]: With dead ends: 207 [2021-11-23 02:27:16,414 INFO L226 Difference]: Without dead ends: 150 [2021-11-23 02:27:16,418 INFO L932 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 [2021-11-23 02:27:16,424 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 120 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:16,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 297 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-23 02:27:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-11-23 02:27:16,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.3197278911564625) internal successors, (194), 147 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:16,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2021-11-23 02:27:16,489 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 71 [2021-11-23 02:27:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:16,490 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2021-11-23 02:27:16,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2021-11-23 02:27:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 02:27:16,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:16,495 INFO L514 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] [2021-11-23 02:27:16,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:27:16,496 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:16,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:16,497 INFO L85 PathProgramCache]: Analyzing trace with hash 369439699, now seen corresponding path program 1 times [2021-11-23 02:27:16,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:16,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698393935] [2021-11-23 02:27:16,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:16,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:16,729 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:16,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698393935] [2021-11-23 02:27:16,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698393935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:16,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:16,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:16,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221763027] [2021-11-23 02:27:16,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:16,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:16,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:16,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:16,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:16,735 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:16,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:16,870 INFO L93 Difference]: Finished difference Result 332 states and 466 transitions. [2021-11-23 02:27:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:16,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-23 02:27:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:16,878 INFO L225 Difference]: With dead ends: 332 [2021-11-23 02:27:16,878 INFO L226 Difference]: Without dead ends: 236 [2021-11-23 02:27:16,879 INFO L932 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 [2021-11-23 02:27:16,881 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 67 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:16,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 236 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-23 02:27:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2021-11-23 02:27:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.3776824034334765) internal successors, (321), 233 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:16,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 321 transitions. [2021-11-23 02:27:16,925 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 321 transitions. Word has length 74 [2021-11-23 02:27:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:16,925 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 321 transitions. [2021-11-23 02:27:16,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 321 transitions. [2021-11-23 02:27:16,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 02:27:16,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:16,928 INFO L514 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] [2021-11-23 02:27:16,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:27:16,929 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:16,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:16,930 INFO L85 PathProgramCache]: Analyzing trace with hash 217690980, now seen corresponding path program 1 times [2021-11-23 02:27:16,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:16,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269167308] [2021-11-23 02:27:16,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:16,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:17,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:17,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269167308] [2021-11-23 02:27:17,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269167308] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:17,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:17,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:17,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946620810] [2021-11-23 02:27:17,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:17,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:17,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:17,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:17,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:17,138 INFO L87 Difference]: Start difference. First operand 234 states and 321 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:17,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:17,250 INFO L93 Difference]: Finished difference Result 582 states and 835 transitions. [2021-11-23 02:27:17,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:17,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 02:27:17,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:17,263 INFO L225 Difference]: With dead ends: 582 [2021-11-23 02:27:17,263 INFO L226 Difference]: Without dead ends: 400 [2021-11-23 02:27:17,265 INFO L932 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 [2021-11-23 02:27:17,267 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 62 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:17,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 232 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:17,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-23 02:27:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2021-11-23 02:27:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.4130982367758187) internal successors, (561), 397 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 561 transitions. [2021-11-23 02:27:17,329 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 561 transitions. Word has length 77 [2021-11-23 02:27:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:17,330 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 561 transitions. [2021-11-23 02:27:17,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 561 transitions. [2021-11-23 02:27:17,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 02:27:17,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:17,333 INFO L514 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] [2021-11-23 02:27:17,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:27:17,338 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:17,340 INFO L85 PathProgramCache]: Analyzing trace with hash 221275412, now seen corresponding path program 1 times [2021-11-23 02:27:17,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:17,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177279363] [2021-11-23 02:27:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:17,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:17,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:17,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177279363] [2021-11-23 02:27:17,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177279363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:17,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:17,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:17,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075269756] [2021-11-23 02:27:17,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:17,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:17,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:17,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:17,481 INFO L87 Difference]: Start difference. First operand 398 states and 561 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:17,586 INFO L93 Difference]: Finished difference Result 1058 states and 1531 transitions. [2021-11-23 02:27:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:17,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-23 02:27:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:17,619 INFO L225 Difference]: With dead ends: 1058 [2021-11-23 02:27:17,619 INFO L226 Difference]: Without dead ends: 712 [2021-11-23 02:27:17,622 INFO L932 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 [2021-11-23 02:27:17,624 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 57 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:17,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 228 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:27:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-11-23 02:27:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 710. [2021-11-23 02:27:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 1.4287729196050776) internal successors, (1013), 709 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:17,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1013 transitions. [2021-11-23 02:27:17,723 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1013 transitions. Word has length 80 [2021-11-23 02:27:17,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:17,723 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 1013 transitions. [2021-11-23 02:27:17,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:17,724 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1013 transitions. [2021-11-23 02:27:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 02:27:17,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:17,735 INFO L514 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] [2021-11-23 02:27:17,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:27:17,735 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1465892275, now seen corresponding path program 1 times [2021-11-23 02:27:17,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:17,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147908523] [2021-11-23 02:27:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:17,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:17,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:17,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147908523] [2021-11-23 02:27:17,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147908523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:17,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:17,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:17,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033906844] [2021-11-23 02:27:17,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:17,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:17,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:17,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:17,915 INFO L87 Difference]: Start difference. First operand 710 states and 1013 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:18,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:18,097 INFO L93 Difference]: Finished difference Result 1962 states and 2839 transitions. [2021-11-23 02:27:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:18,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-23 02:27:18,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:18,109 INFO L225 Difference]: With dead ends: 1962 [2021-11-23 02:27:18,109 INFO L226 Difference]: Without dead ends: 1304 [2021-11-23 02:27:18,111 INFO L932 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 [2021-11-23 02:27:18,123 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 52 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:18,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 224 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-11-23 02:27:18,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1302. [2021-11-23 02:27:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 1.4304381245196003) internal successors, (1861), 1301 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1861 transitions. [2021-11-23 02:27:18,284 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1861 transitions. Word has length 83 [2021-11-23 02:27:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:18,287 INFO L470 AbstractCegarLoop]: Abstraction has 1302 states and 1861 transitions. [2021-11-23 02:27:18,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1861 transitions. [2021-11-23 02:27:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 02:27:18,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:18,297 INFO L514 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] [2021-11-23 02:27:18,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:27:18,298 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:18,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1801422560, now seen corresponding path program 1 times [2021-11-23 02:27:18,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:18,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10731215] [2021-11-23 02:27:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:18,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:18,419 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:18,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10731215] [2021-11-23 02:27:18,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10731215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:18,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:18,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:18,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803263955] [2021-11-23 02:27:18,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:18,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:18,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:18,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:18,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:18,423 INFO L87 Difference]: Start difference. First operand 1302 states and 1861 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:18,742 INFO L93 Difference]: Finished difference Result 3674 states and 5287 transitions. [2021-11-23 02:27:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-23 02:27:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:18,762 INFO L225 Difference]: With dead ends: 3674 [2021-11-23 02:27:18,762 INFO L226 Difference]: Without dead ends: 2424 [2021-11-23 02:27:18,765 INFO L932 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 [2021-11-23 02:27:18,769 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:18,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 220 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:18,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2021-11-23 02:27:19,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2422. [2021-11-23 02:27:19,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 2421 states have (on average 1.4229657166460141) internal successors, (3445), 2421 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 3445 transitions. [2021-11-23 02:27:19,027 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 3445 transitions. Word has length 86 [2021-11-23 02:27:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:19,027 INFO L470 AbstractCegarLoop]: Abstraction has 2422 states and 3445 transitions. [2021-11-23 02:27:19,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:19,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 3445 transitions. [2021-11-23 02:27:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 02:27:19,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:19,032 INFO L514 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] [2021-11-23 02:27:19,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:27:19,033 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:19,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1518929351, now seen corresponding path program 1 times [2021-11-23 02:27:19,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:19,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500035885] [2021-11-23 02:27:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:19,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:19,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:19,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500035885] [2021-11-23 02:27:19,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500035885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:19,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:19,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:19,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062688995] [2021-11-23 02:27:19,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:19,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:19,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:19,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:19,162 INFO L87 Difference]: Start difference. First operand 2422 states and 3445 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:19,714 INFO L93 Difference]: Finished difference Result 6906 states and 9847 transitions. [2021-11-23 02:27:19,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:19,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-23 02:27:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:19,749 INFO L225 Difference]: With dead ends: 6906 [2021-11-23 02:27:19,750 INFO L226 Difference]: Without dead ends: 4536 [2021-11-23 02:27:19,755 INFO L932 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 [2021-11-23 02:27:19,759 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 42 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:19,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 216 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:27:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-11-23 02:27:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 4534. [2021-11-23 02:27:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4534 states, 4533 states have (on average 1.4094418707257887) internal successors, (6389), 4533 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4534 states to 4534 states and 6389 transitions. [2021-11-23 02:27:20,300 INFO L78 Accepts]: Start accepts. Automaton has 4534 states and 6389 transitions. Word has length 89 [2021-11-23 02:27:20,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:20,301 INFO L470 AbstractCegarLoop]: Abstraction has 4534 states and 6389 transitions. [2021-11-23 02:27:20,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:20,302 INFO L276 IsEmpty]: Start isEmpty. Operand 4534 states and 6389 transitions. [2021-11-23 02:27:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 02:27:20,303 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:20,304 INFO L514 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] [2021-11-23 02:27:20,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:27:20,304 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:20,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:20,306 INFO L85 PathProgramCache]: Analyzing trace with hash 441200141, now seen corresponding path program 1 times [2021-11-23 02:27:20,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:20,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138518264] [2021-11-23 02:27:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:20,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:20,474 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:20,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138518264] [2021-11-23 02:27:20,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138518264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:20,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:20,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 02:27:20,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575906417] [2021-11-23 02:27:20,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:20,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:27:20,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:20,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:27:20,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:27:20,478 INFO L87 Difference]: Start difference. First operand 4534 states and 6389 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:22,485 INFO L93 Difference]: Finished difference Result 18170 states and 25800 transitions. [2021-11-23 02:27:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 02:27:22,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-11-23 02:27:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:22,601 INFO L225 Difference]: With dead ends: 18170 [2021-11-23 02:27:22,601 INFO L226 Difference]: Without dead ends: 13688 [2021-11-23 02:27:22,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:27:22,621 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1102 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 3279 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:22,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1102 Valid, 3279 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:27:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13688 states. [2021-11-23 02:27:23,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13688 to 5938. [2021-11-23 02:27:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5938 states, 5937 states have (on average 1.3986862051541182) internal successors, (8304), 5937 states have internal predecessors, (8304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5938 states to 5938 states and 8304 transitions. [2021-11-23 02:27:23,604 INFO L78 Accepts]: Start accepts. Automaton has 5938 states and 8304 transitions. Word has length 92 [2021-11-23 02:27:23,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:23,604 INFO L470 AbstractCegarLoop]: Abstraction has 5938 states and 8304 transitions. [2021-11-23 02:27:23,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 5938 states and 8304 transitions. [2021-11-23 02:27:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:27:23,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:23,607 INFO L514 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] [2021-11-23 02:27:23,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:27:23,607 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:23,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2120384258, now seen corresponding path program 1 times [2021-11-23 02:27:23,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:23,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695153506] [2021-11-23 02:27:23,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:23,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:23,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:23,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695153506] [2021-11-23 02:27:23,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695153506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:23,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:23,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:23,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631966488] [2021-11-23 02:27:23,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:23,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:23,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:23,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:23,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:23,684 INFO L87 Difference]: Start difference. First operand 5938 states and 8304 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 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) [2021-11-23 02:27:24,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:24,675 INFO L93 Difference]: Finished difference Result 15216 states and 21418 transitions. [2021-11-23 02:27:24,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:24,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 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 [2021-11-23 02:27:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:24,737 INFO L225 Difference]: With dead ends: 15216 [2021-11-23 02:27:24,737 INFO L226 Difference]: Without dead ends: 9330 [2021-11-23 02:27:24,752 INFO L932 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 [2021-11-23 02:27:24,755 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 36 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:24,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 183 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:27:24,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-11-23 02:27:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 9328. [2021-11-23 02:27:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.4045244987670205) internal successors, (13100), 9327 states have internal predecessors, (13100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 13100 transitions. [2021-11-23 02:27:25,854 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 13100 transitions. Word has length 94 [2021-11-23 02:27:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:25,855 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 13100 transitions. [2021-11-23 02:27:25,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 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) [2021-11-23 02:27:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 13100 transitions. [2021-11-23 02:27:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:27:25,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:25,857 INFO L514 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] [2021-11-23 02:27:25,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:27:25,858 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:25,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2109242424, now seen corresponding path program 1 times [2021-11-23 02:27:25,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:25,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811842662] [2021-11-23 02:27:25,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:25,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:26,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:26,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811842662] [2021-11-23 02:27:26,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811842662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:26,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:26,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 02:27:26,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052009294] [2021-11-23 02:27:26,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:26,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:27:26,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:26,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:27:26,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:27:26,295 INFO L87 Difference]: Start difference. First operand 9328 states and 13100 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2021-11-23 02:27:27,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:27,756 INFO L93 Difference]: Finished difference Result 18604 states and 26147 transitions. [2021-11-23 02:27:27,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:27:27,757 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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 [2021-11-23 02:27:27,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:27,787 INFO L225 Difference]: With dead ends: 18604 [2021-11-23 02:27:27,787 INFO L226 Difference]: Without dead ends: 9330 [2021-11-23 02:27:27,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:27:27,808 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 550 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:27,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 552 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:27:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-11-23 02:27:28,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 9328. [2021-11-23 02:27:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.4043100675458347) internal successors, (13098), 9327 states have internal predecessors, (13098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:28,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 13098 transitions. [2021-11-23 02:27:28,702 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 13098 transitions. Word has length 94 [2021-11-23 02:27:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:28,703 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 13098 transitions. [2021-11-23 02:27:28,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2021-11-23 02:27:28,704 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 13098 transitions. [2021-11-23 02:27:28,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:27:28,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:28,705 INFO L514 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] [2021-11-23 02:27:28,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:27:28,706 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:28,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:28,707 INFO L85 PathProgramCache]: Analyzing trace with hash -954054155, now seen corresponding path program 1 times [2021-11-23 02:27:28,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:28,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114897390] [2021-11-23 02:27:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:28,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:28,802 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:28,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114897390] [2021-11-23 02:27:28,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114897390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:28,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:28,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:27:28,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724994276] [2021-11-23 02:27:28,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:28,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:27:28,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:28,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:27:28,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:27:28,806 INFO L87 Difference]: Start difference. First operand 9328 states and 13098 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) [2021-11-23 02:27:30,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:30,178 INFO L93 Difference]: Finished difference Result 18602 states and 26142 transitions. [2021-11-23 02:27:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:27:30,183 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 [2021-11-23 02:27:30,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:30,217 INFO L225 Difference]: With dead ends: 18602 [2021-11-23 02:27:30,218 INFO L226 Difference]: Without dead ends: 9328 [2021-11-23 02:27:30,238 INFO L932 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 [2021-11-23 02:27:30,240 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 289 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:30,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 94 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:30,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2021-11-23 02:27:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2021-11-23 02:27:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3905864693899432) internal successors, (12970), 9327 states have internal predecessors, (12970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:31,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12970 transitions. [2021-11-23 02:27:31,418 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12970 transitions. Word has length 95 [2021-11-23 02:27:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:31,418 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 12970 transitions. [2021-11-23 02:27:31,419 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) [2021-11-23 02:27:31,420 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12970 transitions. [2021-11-23 02:27:31,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:27:31,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:31,421 INFO L514 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] [2021-11-23 02:27:31,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:27:31,422 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:31,422 INFO L85 PathProgramCache]: Analyzing trace with hash -585782928, now seen corresponding path program 1 times [2021-11-23 02:27:31,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:31,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249039246] [2021-11-23 02:27:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:31,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:31,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:31,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249039246] [2021-11-23 02:27:31,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249039246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:31,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:31,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:27:31,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805615169] [2021-11-23 02:27:31,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:31,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:27:31,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:27:31,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:27:31,520 INFO L87 Difference]: Start difference. First operand 9328 states and 12970 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) [2021-11-23 02:27:32,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:32,437 INFO L93 Difference]: Finished difference Result 18602 states and 25886 transitions. [2021-11-23 02:27:32,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:27:32,438 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 [2021-11-23 02:27:32,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:32,465 INFO L225 Difference]: With dead ends: 18602 [2021-11-23 02:27:32,465 INFO L226 Difference]: Without dead ends: 9328 [2021-11-23 02:27:32,479 INFO L932 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 [2021-11-23 02:27:32,480 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 260 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:32,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 110 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2021-11-23 02:27:33,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2021-11-23 02:27:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3794360458882813) internal successors, (12866), 9327 states have internal predecessors, (12866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12866 transitions. [2021-11-23 02:27:33,273 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12866 transitions. Word has length 95 [2021-11-23 02:27:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:33,274 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 12866 transitions. [2021-11-23 02:27:33,274 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) [2021-11-23 02:27:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12866 transitions. [2021-11-23 02:27:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:27:33,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:33,276 INFO L514 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] [2021-11-23 02:27:33,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:27:33,277 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:33,278 INFO L85 PathProgramCache]: Analyzing trace with hash -457697621, now seen corresponding path program 1 times [2021-11-23 02:27:33,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:33,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443705991] [2021-11-23 02:27:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:33,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:33,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:33,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:33,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443705991] [2021-11-23 02:27:33,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443705991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:33,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:33,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:27:33,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785897005] [2021-11-23 02:27:33,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:33,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:27:33,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:33,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:27:33,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:27:33,379 INFO L87 Difference]: Start difference. First operand 9328 states and 12866 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) [2021-11-23 02:27:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:34,449 INFO L93 Difference]: Finished difference Result 18602 states and 25678 transitions. [2021-11-23 02:27:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:27:34,450 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 [2021-11-23 02:27:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:34,479 INFO L225 Difference]: With dead ends: 18602 [2021-11-23 02:27:34,479 INFO L226 Difference]: Without dead ends: 9328 [2021-11-23 02:27:34,497 INFO L932 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 [2021-11-23 02:27:34,498 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 231 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:34,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 126 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:34,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2021-11-23 02:27:35,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2021-11-23 02:27:35,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.368928916050177) internal successors, (12768), 9327 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12768 transitions. [2021-11-23 02:27:35,849 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12768 transitions. Word has length 95 [2021-11-23 02:27:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:35,850 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 12768 transitions. [2021-11-23 02:27:35,850 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) [2021-11-23 02:27:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12768 transitions. [2021-11-23 02:27:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:27:35,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:35,852 INFO L514 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] [2021-11-23 02:27:35,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:27:35,853 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:35,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:35,853 INFO L85 PathProgramCache]: Analyzing trace with hash -986988122, now seen corresponding path program 1 times [2021-11-23 02:27:35,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:35,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335596823] [2021-11-23 02:27:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:35,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:35,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:35,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335596823] [2021-11-23 02:27:35,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335596823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:35,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:35,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:27:35,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511269671] [2021-11-23 02:27:35,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:35,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:27:35,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:35,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:27:35,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:27:35,951 INFO L87 Difference]: Start difference. First operand 9328 states and 12768 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) [2021-11-23 02:27:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:37,169 INFO L93 Difference]: Finished difference Result 18602 states and 25482 transitions. [2021-11-23 02:27:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:27:37,170 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 [2021-11-23 02:27:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:37,193 INFO L225 Difference]: With dead ends: 18602 [2021-11-23 02:27:37,193 INFO L226 Difference]: Without dead ends: 9328 [2021-11-23 02:27:37,207 INFO L932 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 [2021-11-23 02:27:37,208 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 267 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:37,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 102 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2021-11-23 02:27:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2021-11-23 02:27:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3569207676637718) internal successors, (12656), 9327 states have internal predecessors, (12656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12656 transitions. [2021-11-23 02:27:38,373 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12656 transitions. Word has length 95 [2021-11-23 02:27:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:38,374 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 12656 transitions. [2021-11-23 02:27:38,374 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) [2021-11-23 02:27:38,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12656 transitions. [2021-11-23 02:27:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:27:38,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:38,376 INFO L514 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] [2021-11-23 02:27:38,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:27:38,377 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:38,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:38,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1749851829, now seen corresponding path program 1 times [2021-11-23 02:27:38,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:38,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801855560] [2021-11-23 02:27:38,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:38,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:38,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:38,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801855560] [2021-11-23 02:27:38,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801855560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:38,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:38,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:27:38,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114727494] [2021-11-23 02:27:38,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:38,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:27:38,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:38,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:27:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:27:38,468 INFO L87 Difference]: Start difference. First operand 9328 states and 12656 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) [2021-11-23 02:27:39,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:39,728 INFO L93 Difference]: Finished difference Result 18602 states and 25258 transitions. [2021-11-23 02:27:39,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:27:39,729 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 [2021-11-23 02:27:39,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:39,748 INFO L225 Difference]: With dead ends: 18602 [2021-11-23 02:27:39,749 INFO L226 Difference]: Without dead ends: 9328 [2021-11-23 02:27:39,760 INFO L932 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 [2021-11-23 02:27:39,761 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 290 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:39,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 86 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:39,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2021-11-23 02:27:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2021-11-23 02:27:40,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3397662699689075) internal successors, (12496), 9327 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:40,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12496 transitions. [2021-11-23 02:27:40,680 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12496 transitions. Word has length 95 [2021-11-23 02:27:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:40,681 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 12496 transitions. [2021-11-23 02:27:40,681 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) [2021-11-23 02:27:40,681 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12496 transitions. [2021-11-23 02:27:40,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:27:40,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:40,682 INFO L514 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] [2021-11-23 02:27:40,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:27:40,683 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:40,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:40,684 INFO L85 PathProgramCache]: Analyzing trace with hash 803698352, now seen corresponding path program 1 times [2021-11-23 02:27:40,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:40,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933685502] [2021-11-23 02:27:40,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:40,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:27:40,829 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:40,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933685502] [2021-11-23 02:27:40,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933685502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:40,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:40,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:27:40,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486921757] [2021-11-23 02:27:40,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:40,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:27:40,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:40,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:27:40,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:27:40,832 INFO L87 Difference]: Start difference. First operand 9328 states and 12496 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 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) [2021-11-23 02:27:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:42,978 INFO L93 Difference]: Finished difference Result 12899 states and 17096 transitions. [2021-11-23 02:27:42,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:27:42,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 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 [2021-11-23 02:27:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:43,003 INFO L225 Difference]: With dead ends: 12899 [2021-11-23 02:27:43,004 INFO L226 Difference]: Without dead ends: 12897 [2021-11-23 02:27:43,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:27:43,010 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 166 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:43,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 661 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:27:43,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12897 states. [2021-11-23 02:27:44,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12897 to 9328. [2021-11-23 02:27:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3329044708909616) internal successors, (12432), 9327 states have internal predecessors, (12432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:27:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12432 transitions. [2021-11-23 02:27:44,151 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12432 transitions. Word has length 95 [2021-11-23 02:27:44,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:44,152 INFO L470 AbstractCegarLoop]: Abstraction has 9328 states and 12432 transitions. [2021-11-23 02:27:44,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 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) [2021-11-23 02:27:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12432 transitions. [2021-11-23 02:27:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 02:27:44,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:44,155 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:27:44,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:27:44,156 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:44,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:44,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1935869303, now seen corresponding path program 1 times [2021-11-23 02:27:44,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:44,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829896639] [2021-11-23 02:27:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:44,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:28:09,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:09,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829896639] [2021-11-23 02:28:09,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829896639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:28:09,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382850036] [2021-11-23 02:28:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:09,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:09,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:09,282 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:09,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c579f2e0-ec70-4c89-a004-eebcf8db0c1a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:28:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:09,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-23 02:28:09,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:35:02,569 INFO L328 TraceCheckSpWp]: Computing backward predicates...