./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P --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 f4eb782e6042aea0609a33229d26d2fc0e173871777f83d353b448b155d9fa10 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:07:18,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:07:18,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:07:18,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:07:18,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:07:18,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:07:18,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:07:18,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:07:18,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:07:18,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:07:18,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:07:18,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:07:18,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:07:18,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:07:18,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:07:19,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:07:19,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:07:19,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:07:19,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:07:19,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:07:19,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:07:19,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:07:19,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:07:19,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:07:19,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:07:19,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:07:19,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:07:19,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:07:19,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:07:19,049 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:07:19,050 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:07:19,051 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:07:19,053 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:07:19,054 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:07:19,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:07:19,056 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:07:19,057 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:07:19,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:07:19,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:07:19,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:07:19,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:07:19,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:07:19,115 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:07:19,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:07:19,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:07:19,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:07:19,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:07:19,126 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:07:19,126 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:07:19,126 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:07:19,127 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:07:19,127 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:07:19,128 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:07:19,128 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:07:19,129 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:07:19,129 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:07:19,129 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:07:19,130 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:07:19,130 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:07:19,130 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:07:19,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:07:19,131 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:07:19,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:07:19,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:07:19,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:07:19,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:07:19,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:07:19,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:07:19,133 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:07:19,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:07:19,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:07:19,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:07:19,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:07:19,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:07:19,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:07:19,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:07:19,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:07:19,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:07:19,136 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:07:19,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:07:19,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:07:19,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:07:19,137 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:07:19,137 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_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4eb782e6042aea0609a33229d26d2fc0e173871777f83d353b448b155d9fa10 [2021-11-21 01:07:19,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:07:19,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:07:19,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:07:19,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:07:19,519 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:07:19,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2021-11-21 01:07:19,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/data/e1a866312/52d074fac74446178492dbb8044addde/FLAG2042ce2c4 [2021-11-21 01:07:20,370 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:07:20,371 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2021-11-21 01:07:20,408 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/data/e1a866312/52d074fac74446178492dbb8044addde/FLAG2042ce2c4 [2021-11-21 01:07:20,514 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/data/e1a866312/52d074fac74446178492dbb8044addde [2021-11-21 01:07:20,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:07:20,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:07:20,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:07:20,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:07:20,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:07:20,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:07:20" (1/1) ... [2021-11-21 01:07:20,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3652e87b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:20, skipping insertion in model container [2021-11-21 01:07:20,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:07:20" (1/1) ... [2021-11-21 01:07:20,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:07:20,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:07:21,317 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_2105c18f-fae3-4558-b523-24d6eb35f6f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[30249,30262] [2021-11-21 01:07:21,401 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_2105c18f-fae3-4558-b523-24d6eb35f6f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[33700,33713] [2021-11-21 01:07:21,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:07:21,662 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:07:21,978 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_2105c18f-fae3-4558-b523-24d6eb35f6f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[30249,30262] [2021-11-21 01:07:22,070 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_2105c18f-fae3-4558-b523-24d6eb35f6f2/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[33700,33713] [2021-11-21 01:07:22,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:07:22,362 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:07:22,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:22 WrapperNode [2021-11-21 01:07:22,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:07:22,364 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:07:22,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:07:22,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:07:22,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:22" (1/1) ... [2021-11-21 01:07:22,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:22" (1/1) ... [2021-11-21 01:07:22,575 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3743 [2021-11-21 01:07:22,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:07:22,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:07:22,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:07:22,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:07:22,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:22" (1/1) ... [2021-11-21 01:07:22,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:22" (1/1) ... [2021-11-21 01:07:22,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:22" (1/1) ... [2021-11-21 01:07:22,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:22" (1/1) ... [2021-11-21 01:07:22,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:22" (1/1) ... [2021-11-21 01:07:22,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:22" (1/1) ... [2021-11-21 01:07:22,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:22" (1/1) ... [2021-11-21 01:07:22,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:07:22,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:07:22,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:07:22,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:07:22,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:22" (1/1) ... [2021-11-21 01:07:22,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:07:22,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:07:22,800 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:07:22,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2105c18f-fae3-4558-b523-24d6eb35f6f2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:07:22,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:07:22,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:07:22,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:07:22,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:07:23,050 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:07:23,054 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:07:26,027 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:07:27,523 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:07:27,524 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:07:27,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:07:27 BoogieIcfgContainer [2021-11-21 01:07:27,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:07:27,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:07:27,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:07:27,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:07:27,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:07:20" (1/3) ... [2021-11-21 01:07:27,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa7bdc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:07:27, skipping insertion in model container [2021-11-21 01:07:27,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:07:22" (2/3) ... [2021-11-21 01:07:27,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa7bdc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:07:27, skipping insertion in model container [2021-11-21 01:07:27,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:07:27" (3/3) ... [2021-11-21 01:07:27,542 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2021-11-21 01:07:27,552 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:07:27,553 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-21 01:07:27,635 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:07:27,647 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 [2021-11-21 01:07:27,648 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-21 01:07:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand has 745 states, 742 states have (on average 1.6388140161725067) internal successors, (1216), 744 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:27,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-21 01:07:27,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:27,754 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:27,755 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:27,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:27,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1674305928, now seen corresponding path program 1 times [2021-11-21 01:07:27,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:27,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989593256] [2021-11-21 01:07:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:27,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:28,589 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:28,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989593256] [2021-11-21 01:07:28,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989593256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:28,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:28,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:07:28,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409016100] [2021-11-21 01:07:28,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:28,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:07:28,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:28,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:07:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:28,639 INFO L87 Difference]: Start difference. First operand has 745 states, 742 states have (on average 1.6388140161725067) internal successors, (1216), 744 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:29,332 INFO L93 Difference]: Finished difference Result 1782 states and 2917 transitions. [2021-11-21 01:07:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:07:29,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-11-21 01:07:29,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:29,371 INFO L225 Difference]: With dead ends: 1782 [2021-11-21 01:07:29,371 INFO L226 Difference]: Without dead ends: 1172 [2021-11-21 01:07:29,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:29,391 INFO L933 BasicCegarLoop]: 1481 mSDtfsCounter, 1772 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:29,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1772 Valid, 2415 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:07:29,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-11-21 01:07:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1168. [2021-11-21 01:07:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1166 states have (on average 1.620926243567753) internal successors, (1890), 1167 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1890 transitions. [2021-11-21 01:07:29,589 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1890 transitions. Word has length 105 [2021-11-21 01:07:29,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:29,590 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1890 transitions. [2021-11-21 01:07:29,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1890 transitions. [2021-11-21 01:07:29,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-21 01:07:29,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:29,598 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:29,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:07:29,599 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:29,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:29,601 INFO L85 PathProgramCache]: Analyzing trace with hash 242166310, now seen corresponding path program 1 times [2021-11-21 01:07:29,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:29,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948543610] [2021-11-21 01:07:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:29,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:29,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:29,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948543610] [2021-11-21 01:07:29,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948543610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:29,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:29,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:07:29,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46246940] [2021-11-21 01:07:29,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:29,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:07:29,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:29,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:07:29,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:29,934 INFO L87 Difference]: Start difference. First operand 1168 states and 1890 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:30,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:30,547 INFO L93 Difference]: Finished difference Result 2632 states and 4261 transitions. [2021-11-21 01:07:30,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:07:30,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-11-21 01:07:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:30,560 INFO L225 Difference]: With dead ends: 2632 [2021-11-21 01:07:30,561 INFO L226 Difference]: Without dead ends: 1604 [2021-11-21 01:07:30,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:30,565 INFO L933 BasicCegarLoop]: 1872 mSDtfsCounter, 957 mSDsluCounter, 1924 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 3712 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:30,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 3712 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:07:30,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-11-21 01:07:30,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1600. [2021-11-21 01:07:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1598 states have (on average 1.6038798498122653) internal successors, (2563), 1599 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2563 transitions. [2021-11-21 01:07:30,651 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2563 transitions. Word has length 111 [2021-11-21 01:07:30,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:30,652 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2563 transitions. [2021-11-21 01:07:30,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:30,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2563 transitions. [2021-11-21 01:07:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-21 01:07:30,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:30,712 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:30,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:07:30,713 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:30,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1701906779, now seen corresponding path program 1 times [2021-11-21 01:07:30,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:30,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043933076] [2021-11-21 01:07:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:30,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:30,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:30,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043933076] [2021-11-21 01:07:30,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043933076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:30,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:30,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:07:30,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853651330] [2021-11-21 01:07:30,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:30,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:07:30,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:30,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:07:30,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:30,967 INFO L87 Difference]: Start difference. First operand 1600 states and 2563 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:31,535 INFO L93 Difference]: Finished difference Result 4122 states and 6616 transitions. [2021-11-21 01:07:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:07:31,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-11-21 01:07:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:31,555 INFO L225 Difference]: With dead ends: 4122 [2021-11-21 01:07:31,555 INFO L226 Difference]: Without dead ends: 2681 [2021-11-21 01:07:31,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:31,560 INFO L933 BasicCegarLoop]: 1125 mSDtfsCounter, 875 mSDsluCounter, 1904 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 2927 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:31,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 2927 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:07:31,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-11-21 01:07:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2677. [2021-11-21 01:07:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2675 states have (on average 1.6022429906542055) internal successors, (4286), 2676 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 4286 transitions. [2021-11-21 01:07:31,717 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 4286 transitions. Word has length 114 [2021-11-21 01:07:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:31,718 INFO L470 AbstractCegarLoop]: Abstraction has 2677 states and 4286 transitions. [2021-11-21 01:07:31,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:31,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 4286 transitions. [2021-11-21 01:07:31,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-21 01:07:31,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:31,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:31,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:07:31,726 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:31,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:31,726 INFO L85 PathProgramCache]: Analyzing trace with hash -26102925, now seen corresponding path program 1 times [2021-11-21 01:07:31,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:31,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969214645] [2021-11-21 01:07:31,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:31,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:31,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969214645] [2021-11-21 01:07:31,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969214645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:31,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:31,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:07:31,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084295061] [2021-11-21 01:07:31,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:31,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:07:31,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:31,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:07:31,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:31,844 INFO L87 Difference]: Start difference. First operand 2677 states and 4286 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:32,468 INFO L93 Difference]: Finished difference Result 6390 states and 10242 transitions. [2021-11-21 01:07:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:07:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-11-21 01:07:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:32,494 INFO L225 Difference]: With dead ends: 6390 [2021-11-21 01:07:32,495 INFO L226 Difference]: Without dead ends: 3871 [2021-11-21 01:07:32,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:32,509 INFO L933 BasicCegarLoop]: 1893 mSDtfsCounter, 984 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 3749 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:32,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [984 Valid, 3749 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:07:32,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-11-21 01:07:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3867. [2021-11-21 01:07:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3865 states have (on average 1.6002587322121604) internal successors, (6185), 3866 states have internal predecessors, (6185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 6185 transitions. [2021-11-21 01:07:32,715 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 6185 transitions. Word has length 120 [2021-11-21 01:07:32,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:32,716 INFO L470 AbstractCegarLoop]: Abstraction has 3867 states and 6185 transitions. [2021-11-21 01:07:32,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:32,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 6185 transitions. [2021-11-21 01:07:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-21 01:07:32,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:32,723 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:32,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:07:32,725 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:32,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:32,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1031686766, now seen corresponding path program 1 times [2021-11-21 01:07:32,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:32,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95426573] [2021-11-21 01:07:32,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:32,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:32,931 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:32,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95426573] [2021-11-21 01:07:32,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95426573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:32,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:32,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:07:32,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637737475] [2021-11-21 01:07:32,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:32,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:07:32,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:07:32,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:32,936 INFO L87 Difference]: Start difference. First operand 3867 states and 6185 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:33,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:33,659 INFO L93 Difference]: Finished difference Result 10323 states and 16533 transitions. [2021-11-21 01:07:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:07:33,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-11-21 01:07:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:33,698 INFO L225 Difference]: With dead ends: 10323 [2021-11-21 01:07:33,698 INFO L226 Difference]: Without dead ends: 6633 [2021-11-21 01:07:33,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:33,706 INFO L933 BasicCegarLoop]: 1123 mSDtfsCounter, 1733 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:33,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 1989 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:07:33,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6633 states. [2021-11-21 01:07:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6633 to 6629. [2021-11-21 01:07:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 6627 states have (on average 1.5961973743775464) internal successors, (10578), 6628 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 10578 transitions. [2021-11-21 01:07:34,080 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 10578 transitions. Word has length 123 [2021-11-21 01:07:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:34,080 INFO L470 AbstractCegarLoop]: Abstraction has 6629 states and 10578 transitions. [2021-11-21 01:07:34,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 10578 transitions. [2021-11-21 01:07:34,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-21 01:07:34,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:34,091 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:34,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:07:34,092 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:34,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:34,092 INFO L85 PathProgramCache]: Analyzing trace with hash -388778377, now seen corresponding path program 1 times [2021-11-21 01:07:34,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:34,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888156334] [2021-11-21 01:07:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:34,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:34,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:34,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:34,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888156334] [2021-11-21 01:07:34,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888156334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:34,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:34,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:07:34,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625529928] [2021-11-21 01:07:34,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:34,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:07:34,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:34,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:07:34,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:34,251 INFO L87 Difference]: Start difference. First operand 6629 states and 10578 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:35,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:35,024 INFO L93 Difference]: Finished difference Result 16290 states and 26024 transitions. [2021-11-21 01:07:35,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:07:35,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-11-21 01:07:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:35,086 INFO L225 Difference]: With dead ends: 16290 [2021-11-21 01:07:35,086 INFO L226 Difference]: Without dead ends: 9837 [2021-11-21 01:07:35,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:35,100 INFO L933 BasicCegarLoop]: 1863 mSDtfsCounter, 1948 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:35,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1948 Valid, 2758 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:07:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9837 states. [2021-11-21 01:07:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9837 to 9833. [2021-11-21 01:07:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9833 states, 9831 states have (on average 1.5939375445020851) internal successors, (15670), 9832 states have internal predecessors, (15670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9833 states to 9833 states and 15670 transitions. [2021-11-21 01:07:35,718 INFO L78 Accepts]: Start accepts. Automaton has 9833 states and 15670 transitions. Word has length 129 [2021-11-21 01:07:35,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:35,719 INFO L470 AbstractCegarLoop]: Abstraction has 9833 states and 15670 transitions. [2021-11-21 01:07:35,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 9833 states and 15670 transitions. [2021-11-21 01:07:35,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-21 01:07:35,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:35,734 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:35,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:07:35,735 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:35,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:35,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1809417986, now seen corresponding path program 1 times [2021-11-21 01:07:35,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:35,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851852262] [2021-11-21 01:07:35,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:35,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:35,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:35,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851852262] [2021-11-21 01:07:35,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851852262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:35,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:35,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:07:35,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541592884] [2021-11-21 01:07:35,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:35,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:07:35,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:35,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:07:35,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:35,932 INFO L87 Difference]: Start difference. First operand 9833 states and 15670 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:36,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:36,915 INFO L93 Difference]: Finished difference Result 26529 states and 42305 transitions. [2021-11-21 01:07:36,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:07:36,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-21 01:07:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:36,973 INFO L225 Difference]: With dead ends: 26529 [2021-11-21 01:07:36,974 INFO L226 Difference]: Without dead ends: 16891 [2021-11-21 01:07:36,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:36,999 INFO L933 BasicCegarLoop]: 1121 mSDtfsCounter, 1723 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 1958 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:37,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1723 Valid, 1958 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:07:37,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16891 states. [2021-11-21 01:07:37,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16891 to 16887. [2021-11-21 01:07:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16887 states, 16885 states have (on average 1.58732602901984) internal successors, (26802), 16886 states have internal predecessors, (26802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16887 states to 16887 states and 26802 transitions. [2021-11-21 01:07:37,986 INFO L78 Accepts]: Start accepts. Automaton has 16887 states and 26802 transitions. Word has length 132 [2021-11-21 01:07:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:37,986 INFO L470 AbstractCegarLoop]: Abstraction has 16887 states and 26802 transitions. [2021-11-21 01:07:37,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:37,987 INFO L276 IsEmpty]: Start isEmpty. Operand 16887 states and 26802 transitions. [2021-11-21 01:07:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-21 01:07:38,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:38,016 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:38,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:07:38,017 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:38,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:38,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1711558555, now seen corresponding path program 1 times [2021-11-21 01:07:38,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:38,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916701864] [2021-11-21 01:07:38,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:38,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:38,138 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:38,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916701864] [2021-11-21 01:07:38,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916701864] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:38,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:38,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:07:38,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289012620] [2021-11-21 01:07:38,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:38,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:07:38,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:38,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:07:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:38,142 INFO L87 Difference]: Start difference. First operand 16887 states and 26802 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:39,694 INFO L93 Difference]: Finished difference Result 42098 states and 66902 transitions. [2021-11-21 01:07:39,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:07:39,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 138 [2021-11-21 01:07:39,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:39,918 INFO L225 Difference]: With dead ends: 42098 [2021-11-21 01:07:39,918 INFO L226 Difference]: Without dead ends: 25405 [2021-11-21 01:07:39,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:39,961 INFO L933 BasicCegarLoop]: 1833 mSDtfsCounter, 978 mSDsluCounter, 1834 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:39,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 3577 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:07:40,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25405 states. [2021-11-21 01:07:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25405 to 25401. [2021-11-21 01:07:41,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25401 states, 25399 states have (on average 1.5849836607740462) internal successors, (40257), 25400 states have internal predecessors, (40257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25401 states to 25401 states and 40257 transitions. [2021-11-21 01:07:41,721 INFO L78 Accepts]: Start accepts. Automaton has 25401 states and 40257 transitions. Word has length 138 [2021-11-21 01:07:41,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:41,723 INFO L470 AbstractCegarLoop]: Abstraction has 25401 states and 40257 transitions. [2021-11-21 01:07:41,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:41,724 INFO L276 IsEmpty]: Start isEmpty. Operand 25401 states and 40257 transitions. [2021-11-21 01:07:41,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-21 01:07:41,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:41,760 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:41,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:07:41,761 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:41,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1867205292, now seen corresponding path program 1 times [2021-11-21 01:07:41,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:41,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559533933] [2021-11-21 01:07:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:41,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:41,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:41,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559533933] [2021-11-21 01:07:41,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559533933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:41,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:41,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:07:41,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044648311] [2021-11-21 01:07:41,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:41,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:07:41,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:41,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:07:41,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:41,941 INFO L87 Difference]: Start difference. First operand 25401 states and 40257 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:44,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:44,372 INFO L93 Difference]: Finished difference Result 64246 states and 101503 transitions. [2021-11-21 01:07:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:07:44,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-11-21 01:07:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:44,539 INFO L225 Difference]: With dead ends: 64246 [2021-11-21 01:07:44,540 INFO L226 Difference]: Without dead ends: 39052 [2021-11-21 01:07:44,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:44,607 INFO L933 BasicCegarLoop]: 1829 mSDtfsCounter, 945 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 3587 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:44,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 3587 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:07:44,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-21 01:07:46,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-21 01:07:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5675357270911232) internal successors, (61206), 39047 states have internal predecessors, (61206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:46,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 61206 transitions. [2021-11-21 01:07:46,377 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 61206 transitions. Word has length 141 [2021-11-21 01:07:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:46,378 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 61206 transitions. [2021-11-21 01:07:46,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 61206 transitions. [2021-11-21 01:07:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-21 01:07:46,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:46,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:46,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 01:07:46,515 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:46,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:46,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1176593850, now seen corresponding path program 1 times [2021-11-21 01:07:46,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:46,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804549589] [2021-11-21 01:07:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:46,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:46,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:46,682 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:46,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804549589] [2021-11-21 01:07:46,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804549589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:46,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:46,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:07:46,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556365424] [2021-11-21 01:07:46,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:46,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:07:46,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:46,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:07:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:46,685 INFO L87 Difference]: Start difference. First operand 39048 states and 61206 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:49,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:49,091 INFO L93 Difference]: Finished difference Result 77893 states and 122093 transitions. [2021-11-21 01:07:49,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:07:49,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-21 01:07:49,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:49,182 INFO L225 Difference]: With dead ends: 77893 [2021-11-21 01:07:49,183 INFO L226 Difference]: Without dead ends: 39052 [2021-11-21 01:07:49,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:49,236 INFO L933 BasicCegarLoop]: 1835 mSDtfsCounter, 1853 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 2733 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:49,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1853 Valid, 2733 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:07:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-21 01:07:51,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-21 01:07:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.562951390667418) internal successors, (61027), 39047 states have internal predecessors, (61027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 61027 transitions. [2021-11-21 01:07:51,286 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 61027 transitions. Word has length 142 [2021-11-21 01:07:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:51,286 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 61027 transitions. [2021-11-21 01:07:51,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 61027 transitions. [2021-11-21 01:07:51,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-21 01:07:51,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:51,332 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:51,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:07:51,333 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:51,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:51,333 INFO L85 PathProgramCache]: Analyzing trace with hash 761269293, now seen corresponding path program 1 times [2021-11-21 01:07:51,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:51,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895609206] [2021-11-21 01:07:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:51,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:51,475 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:51,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895609206] [2021-11-21 01:07:51,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895609206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:51,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:51,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:07:51,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568943358] [2021-11-21 01:07:51,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:51,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:07:51,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:51,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:07:51,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:51,479 INFO L87 Difference]: Start difference. First operand 39048 states and 61027 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:53,542 INFO L93 Difference]: Finished difference Result 77893 states and 121736 transitions. [2021-11-21 01:07:53,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:07:53,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2021-11-21 01:07:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:53,629 INFO L225 Difference]: With dead ends: 77893 [2021-11-21 01:07:53,629 INFO L226 Difference]: Without dead ends: 39052 [2021-11-21 01:07:53,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:53,672 INFO L933 BasicCegarLoop]: 1825 mSDtfsCounter, 1910 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:53,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1910 Valid, 2696 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:07:53,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-21 01:07:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-21 01:07:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5583670542437125) internal successors, (60848), 39047 states have internal predecessors, (60848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 60848 transitions. [2021-11-21 01:07:55,430 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 60848 transitions. Word has length 143 [2021-11-21 01:07:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:07:55,431 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 60848 transitions. [2021-11-21 01:07:55,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 60848 transitions. [2021-11-21 01:07:55,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-21 01:07:55,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:07:55,460 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:07:55,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:07:55,460 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:07:55,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:07:55,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1585737793, now seen corresponding path program 1 times [2021-11-21 01:07:55,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:07:55,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021088272] [2021-11-21 01:07:55,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:07:55,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:07:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:07:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:07:55,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:07:55,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021088272] [2021-11-21 01:07:55,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021088272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:07:55,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:07:55,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:07:55,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691587469] [2021-11-21 01:07:55,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:07:55,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:07:55,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:07:55,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:07:55,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:55,594 INFO L87 Difference]: Start difference. First operand 39048 states and 60848 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:07:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:07:58,072 INFO L93 Difference]: Finished difference Result 77893 states and 121379 transitions. [2021-11-21 01:07:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:07:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2021-11-21 01:07:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:07:58,156 INFO L225 Difference]: With dead ends: 77893 [2021-11-21 01:07:58,157 INFO L226 Difference]: Without dead ends: 39052 [2021-11-21 01:07:58,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:07:58,191 INFO L933 BasicCegarLoop]: 1797 mSDtfsCounter, 1907 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1907 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:07:58,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1907 Valid, 2641 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:07:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-21 01:08:00,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-21 01:08:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5537827178200072) internal successors, (60669), 39047 states have internal predecessors, (60669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 60669 transitions. [2021-11-21 01:08:00,237 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 60669 transitions. Word has length 144 [2021-11-21 01:08:00,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:00,237 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 60669 transitions. [2021-11-21 01:08:00,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 60669 transitions. [2021-11-21 01:08:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-21 01:08:00,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:00,263 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:00,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 01:08:00,263 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:00,264 INFO L85 PathProgramCache]: Analyzing trace with hash 675231494, now seen corresponding path program 1 times [2021-11-21 01:08:00,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:00,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175462017] [2021-11-21 01:08:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:00,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:00,434 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:00,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175462017] [2021-11-21 01:08:00,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175462017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:00,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:00,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:08:00,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768670828] [2021-11-21 01:08:00,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:00,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:08:00,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:00,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:08:00,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:08:00,437 INFO L87 Difference]: Start difference. First operand 39048 states and 60669 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:02,684 INFO L93 Difference]: Finished difference Result 77893 states and 121022 transitions. [2021-11-21 01:08:02,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:08:02,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-11-21 01:08:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:02,745 INFO L225 Difference]: With dead ends: 77893 [2021-11-21 01:08:02,745 INFO L226 Difference]: Without dead ends: 39052 [2021-11-21 01:08:02,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:08:02,789 INFO L933 BasicCegarLoop]: 1769 mSDtfsCounter, 967 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:02,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 3413 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:08:02,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-21 01:08:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-21 01:08:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5491983813963017) internal successors, (60490), 39047 states have internal predecessors, (60490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 60490 transitions. [2021-11-21 01:08:05,222 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 60490 transitions. Word has length 145 [2021-11-21 01:08:05,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:05,222 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 60490 transitions. [2021-11-21 01:08:05,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:05,223 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 60490 transitions. [2021-11-21 01:08:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-21 01:08:05,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:05,254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:05,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 01:08:05,255 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:05,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1750127981, now seen corresponding path program 1 times [2021-11-21 01:08:05,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:05,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16750431] [2021-11-21 01:08:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:05,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:05,457 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:05,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16750431] [2021-11-21 01:08:05,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16750431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:05,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:05,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:08:05,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242104668] [2021-11-21 01:08:05,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:05,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:08:05,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:05,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:08:05,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:08:05,461 INFO L87 Difference]: Start difference. First operand 39048 states and 60490 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:07,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:07,845 INFO L93 Difference]: Finished difference Result 77893 states and 120665 transitions. [2021-11-21 01:08:07,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:08:07,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2021-11-21 01:08:07,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:07,905 INFO L225 Difference]: With dead ends: 77893 [2021-11-21 01:08:07,906 INFO L226 Difference]: Without dead ends: 39052 [2021-11-21 01:08:07,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:08:07,937 INFO L933 BasicCegarLoop]: 1829 mSDtfsCounter, 930 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 3587 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:07,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 3587 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 01:08:07,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-21 01:08:09,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-21 01:08:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5470982943195206) internal successors, (60408), 39047 states have internal predecessors, (60408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:10,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 60408 transitions. [2021-11-21 01:08:10,309 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 60408 transitions. Word has length 147 [2021-11-21 01:08:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:10,310 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 60408 transitions. [2021-11-21 01:08:10,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:10,310 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 60408 transitions. [2021-11-21 01:08:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-21 01:08:10,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:10,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:10,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 01:08:10,349 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:10,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1604354251, now seen corresponding path program 1 times [2021-11-21 01:08:10,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:10,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885036717] [2021-11-21 01:08:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:10,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:10,530 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:10,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885036717] [2021-11-21 01:08:10,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885036717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:10,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:10,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:08:10,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221998046] [2021-11-21 01:08:10,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:10,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:08:10,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:10,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:08:10,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:08:10,533 INFO L87 Difference]: Start difference. First operand 39048 states and 60408 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:13,637 INFO L93 Difference]: Finished difference Result 97725 states and 150341 transitions. [2021-11-21 01:08:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:08:13,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2021-11-21 01:08:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:13,734 INFO L225 Difference]: With dead ends: 97725 [2021-11-21 01:08:13,735 INFO L226 Difference]: Without dead ends: 58884 [2021-11-21 01:08:13,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:08:13,769 INFO L933 BasicCegarLoop]: 1847 mSDtfsCounter, 1835 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1835 SdHoareTripleChecker+Valid, 2745 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:13,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1835 Valid, 2745 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:08:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58884 states. [2021-11-21 01:08:16,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58884 to 58880. [2021-11-21 01:08:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58880 states, 58878 states have (on average 1.530707564795) internal successors, (90125), 58879 states have internal predecessors, (90125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:16,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58880 states to 58880 states and 90125 transitions. [2021-11-21 01:08:16,963 INFO L78 Accepts]: Start accepts. Automaton has 58880 states and 90125 transitions. Word has length 150 [2021-11-21 01:08:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:08:16,964 INFO L470 AbstractCegarLoop]: Abstraction has 58880 states and 90125 transitions. [2021-11-21 01:08:16,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:16,964 INFO L276 IsEmpty]: Start isEmpty. Operand 58880 states and 90125 transitions. [2021-11-21 01:08:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-21 01:08:17,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:08:17,002 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:08:17,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 01:08:17,003 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:08:17,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:08:17,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1551160667, now seen corresponding path program 1 times [2021-11-21 01:08:17,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:08:17,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216719319] [2021-11-21 01:08:17,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:08:17,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:08:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:08:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:08:18,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:08:18,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216719319] [2021-11-21 01:08:18,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216719319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:08:18,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:08:18,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-21 01:08:18,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789750345] [2021-11-21 01:08:18,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:08:18,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:08:18,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:08:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:08:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:08:18,066 INFO L87 Difference]: Start difference. First operand 58880 states and 90125 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:08:22,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:08:22,634 INFO L93 Difference]: Finished difference Result 113993 states and 174877 transitions. [2021-11-21 01:08:22,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:08:22,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 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 151 [2021-11-21 01:08:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:08:22,792 INFO L225 Difference]: With dead ends: 113993 [2021-11-21 01:08:22,793 INFO L226 Difference]: Without dead ends: 82174 [2021-11-21 01:08:22,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:08:22,829 INFO L933 BasicCegarLoop]: 2364 mSDtfsCounter, 2849 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2849 SdHoareTripleChecker+Valid, 4434 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:08:22,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2849 Valid, 4434 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:08:22,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82174 states.