./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3fb71e8e4e407700549b8952f3afdeeffa0973a11e08bb7f18bca04e4b75e49d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:43:00,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:43:00,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:43:00,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:43:00,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:43:00,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:43:00,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:43:00,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:43:00,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:43:01,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:43:01,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:43:01,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:43:01,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:43:01,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:43:01,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:43:01,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:43:01,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:43:01,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:43:01,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:43:01,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:43:01,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:43:01,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:43:01,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:43:01,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:43:01,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:43:01,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:43:01,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:43:01,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:43:01,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:43:01,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:43:01,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:43:01,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:43:01,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:43:01,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:43:01,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:43:01,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:43:01,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:43:01,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:43:01,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:43:01,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:43:01,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:43:01,057 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:43:01,105 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:43:01,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:43:01,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:43:01,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:43:01,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:43:01,114 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:43:01,114 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:43:01,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:43:01,115 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:43:01,115 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:43:01,116 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:43:01,117 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:43:01,117 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:43:01,117 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:43:01,118 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:43:01,118 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:43:01,118 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:43:01,118 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:43:01,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:43:01,119 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:43:01,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:43:01,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:43:01,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:43:01,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:43:01,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:43:01,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:43:01,123 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:43:01,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:43:01,124 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:43:01,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:43:01,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:43:01,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:43:01,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:43:01,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:43:01,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:43:01,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:43:01,126 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:43:01,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:43:01,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:43:01,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:43:01,127 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:43:01,127 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_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fb71e8e4e407700549b8952f3afdeeffa0973a11e08bb7f18bca04e4b75e49d [2021-11-23 02:43:01,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:43:01,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:43:01,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:43:01,484 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:43:01,485 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:43:01,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 02:43:01,572 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/data/1aa8a096d/175024af8c554442984e734fa115e6dd/FLAG64f062230 [2021-11-23 02:43:02,116 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:43:02,117 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 02:43:02,133 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/data/1aa8a096d/175024af8c554442984e734fa115e6dd/FLAG64f062230 [2021-11-23 02:43:02,397 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/data/1aa8a096d/175024af8c554442984e734fa115e6dd [2021-11-23 02:43:02,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:43:02,405 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:43:02,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:43:02,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:43:02,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:43:02,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:02" (1/1) ... [2021-11-23 02:43:02,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29ab6c0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:02, skipping insertion in model container [2021-11-23 02:43:02,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:02" (1/1) ... [2021-11-23 02:43:02,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:43:02,490 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:43:02,782 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_8e1ff08c-b606-46bc-9179-26b7a61ddffa/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[10378,10391] [2021-11-23 02:43:02,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:43:02,862 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:43:02,927 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_8e1ff08c-b606-46bc-9179-26b7a61ddffa/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[10378,10391] [2021-11-23 02:43:02,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:43:02,991 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:43:02,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:02 WrapperNode [2021-11-23 02:43:02,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:43:02,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:43:02,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:43:02,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:43:03,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:02" (1/1) ... [2021-11-23 02:43:03,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:02" (1/1) ... [2021-11-23 02:43:03,088 INFO L137 Inliner]: procedures = 27, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 830 [2021-11-23 02:43:03,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:43:03,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:43:03,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:43:03,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:43:03,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:02" (1/1) ... [2021-11-23 02:43:03,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:02" (1/1) ... [2021-11-23 02:43:03,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:02" (1/1) ... [2021-11-23 02:43:03,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:02" (1/1) ... [2021-11-23 02:43:03,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:02" (1/1) ... [2021-11-23 02:43:03,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:02" (1/1) ... [2021-11-23 02:43:03,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:02" (1/1) ... [2021-11-23 02:43:03,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:43:03,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:43:03,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:43:03,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:43:03,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:02" (1/1) ... [2021-11-23 02:43:03,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:43:03,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:43:03,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:43:03,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e1ff08c-b606-46bc-9179-26b7a61ddffa/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:43:03,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:43:03,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:43:03,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:43:03,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:43:03,384 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:43:03,386 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:43:04,105 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:43:04,258 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:43:04,258 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:43:04,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:04 BoogieIcfgContainer [2021-11-23 02:43:04,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:43:04,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:43:04,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:43:04,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:43:04,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:43:02" (1/3) ... [2021-11-23 02:43:04,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7175a22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:43:04, skipping insertion in model container [2021-11-23 02:43:04,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:02" (2/3) ... [2021-11-23 02:43:04,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7175a22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:43:04, skipping insertion in model container [2021-11-23 02:43:04,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:04" (3/3) ... [2021-11-23 02:43:04,270 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 02:43:04,275 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:43:04,275 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:43:04,323 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:43:04,330 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:43:04,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:43:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 142 states have (on average 1.7746478873239437) internal successors, (252), 143 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 02:43:04,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:04,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:04,383 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:04,388 INFO L85 PathProgramCache]: Analyzing trace with hash -299843787, now seen corresponding path program 1 times [2021-11-23 02:43:04,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:04,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791532396] [2021-11-23 02:43:04,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:04,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:43:04,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:04,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791532396] [2021-11-23 02:43:04,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791532396] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:04,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:04,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:43:04,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750462807] [2021-11-23 02:43:04,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:04,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:43:04,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:43:04,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:43:04,932 INFO L87 Difference]: Start difference. First operand has 144 states, 142 states have (on average 1.7746478873239437) internal successors, (252), 143 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:05,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:05,196 INFO L93 Difference]: Finished difference Result 221 states and 369 transitions. [2021-11-23 02:43:05,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:43:05,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-23 02:43:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:05,209 INFO L225 Difference]: With dead ends: 221 [2021-11-23 02:43:05,210 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 02:43:05,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:43:05,217 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 600 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:05,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 220 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:43:05,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 02:43:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-23 02:43:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.2127659574468086) internal successors, (171), 141 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 171 transitions. [2021-11-23 02:43:05,273 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 171 transitions. Word has length 92 [2021-11-23 02:43:05,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:05,275 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 171 transitions. [2021-11-23 02:43:05,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:05,275 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 171 transitions. [2021-11-23 02:43:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 02:43:05,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:05,279 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] [2021-11-23 02:43:05,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:43:05,280 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:05,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1832257677, now seen corresponding path program 1 times [2021-11-23 02:43:05,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:05,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207422354] [2021-11-23 02:43:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:05,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:43:05,519 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:05,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207422354] [2021-11-23 02:43:05,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207422354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:05,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:05,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:43:05,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304586093] [2021-11-23 02:43:05,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:05,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:43:05,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:05,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:43:05,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:43:05,527 INFO L87 Difference]: Start difference. First operand 142 states and 171 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:05,705 INFO L93 Difference]: Finished difference Result 221 states and 276 transitions. [2021-11-23 02:43:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:43:05,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-23 02:43:05,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:05,712 INFO L225 Difference]: With dead ends: 221 [2021-11-23 02:43:05,712 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 02:43:05,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:43:05,720 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 420 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:05,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 105 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:43:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 02:43:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-23 02:43:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.198581560283688) internal successors, (169), 141 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 169 transitions. [2021-11-23 02:43:05,752 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 169 transitions. Word has length 93 [2021-11-23 02:43:05,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:05,759 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 169 transitions. [2021-11-23 02:43:05,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 169 transitions. [2021-11-23 02:43:05,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:43:05,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:05,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:05,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:43:05,770 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:05,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:05,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2137785077, now seen corresponding path program 1 times [2021-11-23 02:43:05,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:05,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736429740] [2021-11-23 02:43:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:05,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:43:05,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:05,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736429740] [2021-11-23 02:43:05,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736429740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:05,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:05,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:43:05,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509420020] [2021-11-23 02:43:05,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:05,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:43:05,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:05,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:43:05,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:43:05,916 INFO L87 Difference]: Start difference. First operand 142 states and 169 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:06,082 INFO L93 Difference]: Finished difference Result 217 states and 268 transitions. [2021-11-23 02:43:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:43:06,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-23 02:43:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:06,085 INFO L225 Difference]: With dead ends: 217 [2021-11-23 02:43:06,085 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 02:43:06,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:43:06,094 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 402 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:06,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 113 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:43:06,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 02:43:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-23 02:43:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1843971631205674) internal successors, (167), 141 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:06,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 167 transitions. [2021-11-23 02:43:06,125 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 167 transitions. Word has length 94 [2021-11-23 02:43:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:06,127 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 167 transitions. [2021-11-23 02:43:06,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 167 transitions. [2021-11-23 02:43:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:43:06,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:06,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:06,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:43:06,136 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:06,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:06,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1225797977, now seen corresponding path program 1 times [2021-11-23 02:43:06,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:06,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259446137] [2021-11-23 02:43:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:06,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:43:06,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:06,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259446137] [2021-11-23 02:43:06,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259446137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:06,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:06,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:43:06,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034036240] [2021-11-23 02:43:06,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:06,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:43:06,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:43:06,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:43:06,298 INFO L87 Difference]: Start difference. First operand 142 states and 167 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:06,446 INFO L93 Difference]: Finished difference Result 225 states and 273 transitions. [2021-11-23 02:43:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:43:06,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 02:43:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:06,448 INFO L225 Difference]: With dead ends: 225 [2021-11-23 02:43:06,448 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 02:43:06,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:43:06,459 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 419 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:06,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 97 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:43:06,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 02:43:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-23 02:43:06,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1702127659574468) internal successors, (165), 141 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:06,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 165 transitions. [2021-11-23 02:43:06,484 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 165 transitions. Word has length 95 [2021-11-23 02:43:06,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:06,485 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 165 transitions. [2021-11-23 02:43:06,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:06,486 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 165 transitions. [2021-11-23 02:43:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 02:43:06,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:06,488 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] [2021-11-23 02:43:06,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:43:06,489 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:06,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:06,500 INFO L85 PathProgramCache]: Analyzing trace with hash -2060914787, now seen corresponding path program 1 times [2021-11-23 02:43:06,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:06,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172495333] [2021-11-23 02:43:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:06,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:43:06,626 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:06,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172495333] [2021-11-23 02:43:06,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172495333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:06,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:06,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:43:06,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786913538] [2021-11-23 02:43:06,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:06,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:43:06,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:06,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:43:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:43:06,629 INFO L87 Difference]: Start difference. First operand 142 states and 165 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:06,791 INFO L93 Difference]: Finished difference Result 229 states and 274 transitions. [2021-11-23 02:43:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:43:06,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-23 02:43:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:06,794 INFO L225 Difference]: With dead ends: 229 [2021-11-23 02:43:06,794 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 02:43:06,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:43:06,795 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 355 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:06,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 119 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:43:06,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 02:43:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-23 02:43:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1631205673758864) internal successors, (164), 141 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2021-11-23 02:43:06,809 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 96 [2021-11-23 02:43:06,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:06,809 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2021-11-23 02:43:06,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:06,810 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2021-11-23 02:43:06,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-23 02:43:06,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:06,811 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] [2021-11-23 02:43:06,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:43:06,812 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:06,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:06,812 INFO L85 PathProgramCache]: Analyzing trace with hash 49922267, now seen corresponding path program 1 times [2021-11-23 02:43:06,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:06,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707721723] [2021-11-23 02:43:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:06,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:43:06,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:06,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707721723] [2021-11-23 02:43:06,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707721723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:06,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:06,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:43:06,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853024142] [2021-11-23 02:43:06,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:06,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:43:06,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:06,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:43:06,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:43:06,901 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:07,044 INFO L93 Difference]: Finished difference Result 205 states and 247 transitions. [2021-11-23 02:43:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:43:07,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-23 02:43:07,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:07,045 INFO L225 Difference]: With dead ends: 205 [2021-11-23 02:43:07,046 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 02:43:07,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:43:07,047 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 353 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:07,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 137 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:43:07,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 02:43:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-23 02:43:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.148936170212766) internal successors, (162), 141 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 162 transitions. [2021-11-23 02:43:07,059 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 162 transitions. Word has length 97 [2021-11-23 02:43:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:07,060 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 162 transitions. [2021-11-23 02:43:07,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 162 transitions. [2021-11-23 02:43:07,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 02:43:07,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:07,061 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] [2021-11-23 02:43:07,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:43:07,062 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:07,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:07,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2122168691, now seen corresponding path program 1 times [2021-11-23 02:43:07,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:07,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230420190] [2021-11-23 02:43:07,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:07,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:43:07,139 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:07,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230420190] [2021-11-23 02:43:07,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230420190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:07,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:07,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:43:07,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641662885] [2021-11-23 02:43:07,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:07,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:43:07,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:43:07,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:43:07,142 INFO L87 Difference]: Start difference. First operand 142 states and 162 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:07,282 INFO L93 Difference]: Finished difference Result 209 states and 248 transitions. [2021-11-23 02:43:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:43:07,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-23 02:43:07,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:07,284 INFO L225 Difference]: With dead ends: 209 [2021-11-23 02:43:07,284 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 02:43:07,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:43:07,285 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 355 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:07,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 129 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:43:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 02:43:07,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-23 02:43:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1347517730496455) internal successors, (160), 141 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 160 transitions. [2021-11-23 02:43:07,298 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 160 transitions. Word has length 98 [2021-11-23 02:43:07,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:07,299 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 160 transitions. [2021-11-23 02:43:07,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:07,299 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 160 transitions. [2021-11-23 02:43:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 02:43:07,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:07,300 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] [2021-11-23 02:43:07,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:43:07,300 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:07,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:07,301 INFO L85 PathProgramCache]: Analyzing trace with hash 290431503, now seen corresponding path program 1 times [2021-11-23 02:43:07,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:07,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056207925] [2021-11-23 02:43:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:07,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:43:22,211 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:22,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056207925] [2021-11-23 02:43:22,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056207925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:22,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:22,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-11-23 02:43:22,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475711369] [2021-11-23 02:43:22,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:22,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 02:43:22,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:22,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 02:43:22,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 02:43:22,215 INFO L87 Difference]: Start difference. First operand 142 states and 160 transitions. Second operand has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:43,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:43,130 INFO L93 Difference]: Finished difference Result 292 states and 364 transitions. [2021-11-23 02:43:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 02:43:43,130 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-23 02:43:43,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:43,134 INFO L225 Difference]: With dead ends: 292 [2021-11-23 02:43:43,135 INFO L226 Difference]: Without dead ends: 242 [2021-11-23 02:43:43,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=1807, Invalid=5675, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 02:43:43,140 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 1377 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 3973 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 2170 SdHoareTripleChecker+Invalid, 4036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:43,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1377 Valid, 2170 Invalid, 4036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 3973 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-23 02:43:43,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-23 02:43:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 238. [2021-11-23 02:43:43,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.2320675105485233) internal successors, (292), 237 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 292 transitions. [2021-11-23 02:43:43,170 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 292 transitions. Word has length 99 [2021-11-23 02:43:43,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:43,170 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 292 transitions. [2021-11-23 02:43:43,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0625) internal successors, (99), 47 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 292 transitions. [2021-11-23 02:43:43,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 02:43:43,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:43,172 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] [2021-11-23 02:43:43,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:43:43,173 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:43,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:43,173 INFO L85 PathProgramCache]: Analyzing trace with hash 917023825, now seen corresponding path program 1 times [2021-11-23 02:43:43,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:43,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054275685] [2021-11-23 02:43:43,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:43,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:43:43,352 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:43,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054275685] [2021-11-23 02:43:43,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054275685] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:43,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:43,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:43:43,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791476436] [2021-11-23 02:43:43,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:43,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:43:43,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:43,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:43:43,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:43:43,354 INFO L87 Difference]: Start difference. First operand 238 states and 292 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:43,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:43,457 INFO L93 Difference]: Finished difference Result 481 states and 625 transitions. [2021-11-23 02:43:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:43:43,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-23 02:43:43,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:43,460 INFO L225 Difference]: With dead ends: 481 [2021-11-23 02:43:43,460 INFO L226 Difference]: Without dead ends: 335 [2021-11-23 02:43:43,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:43:43,463 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 62 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:43,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 412 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:43:43,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-23 02:43:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 333. [2021-11-23 02:43:43,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.2680722891566265) internal successors, (421), 332 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:43,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 421 transitions. [2021-11-23 02:43:43,510 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 421 transitions. Word has length 101 [2021-11-23 02:43:43,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:43,510 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 421 transitions. [2021-11-23 02:43:43,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:43,511 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 421 transitions. [2021-11-23 02:43:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-23 02:43:43,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:43,512 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] [2021-11-23 02:43:43,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:43:43,512 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:43,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1144776020, now seen corresponding path program 1 times [2021-11-23 02:43:43,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:43,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350760424] [2021-11-23 02:43:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:43,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:43:57,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:57,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350760424] [2021-11-23 02:43:57,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350760424] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:57,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:57,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-11-23 02:43:57,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452066167] [2021-11-23 02:43:57,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:57,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-23 02:43:57,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-23 02:43:57,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:43:57,894 INFO L87 Difference]: Start difference. First operand 333 states and 421 transitions. Second operand has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:20,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:20,465 INFO L93 Difference]: Finished difference Result 630 states and 824 transitions. [2021-11-23 02:44:20,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 02:44:20,465 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-23 02:44:20,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:20,468 INFO L225 Difference]: With dead ends: 630 [2021-11-23 02:44:20,468 INFO L226 Difference]: Without dead ends: 389 [2021-11-23 02:44:20,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=1871, Invalid=6319, Unknown=0, NotChecked=0, Total=8190 [2021-11-23 02:44:20,472 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 1383 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:20,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1383 Valid, 1386 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-23 02:44:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-23 02:44:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 382. [2021-11-23 02:44:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.272965879265092) internal successors, (485), 381 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 485 transitions. [2021-11-23 02:44:20,525 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 485 transitions. Word has length 101 [2021-11-23 02:44:20,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:20,525 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 485 transitions. [2021-11-23 02:44:20,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:20,526 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 485 transitions. [2021-11-23 02:44:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 02:44:20,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:20,527 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] [2021-11-23 02:44:20,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:44:20,528 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1142734549, now seen corresponding path program 1 times [2021-11-23 02:44:20,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:20,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123633559] [2021-11-23 02:44:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:20,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:20,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:20,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123633559] [2021-11-23 02:44:20,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123633559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:20,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:20,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:44:20,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177291252] [2021-11-23 02:44:20,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:20,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:44:20,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:20,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:44:20,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:44:20,631 INFO L87 Difference]: Start difference. First operand 382 states and 485 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:20,891 INFO L93 Difference]: Finished difference Result 662 states and 858 transitions. [2021-11-23 02:44:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:44:20,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-23 02:44:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:20,896 INFO L225 Difference]: With dead ends: 662 [2021-11-23 02:44:20,896 INFO L226 Difference]: Without dead ends: 564 [2021-11-23 02:44:20,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:44:20,897 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 330 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:20,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 850 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:44:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-23 02:44:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 333. [2021-11-23 02:44:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.2530120481927711) internal successors, (416), 332 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 416 transitions. [2021-11-23 02:44:20,951 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 416 transitions. Word has length 102 [2021-11-23 02:44:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:20,952 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 416 transitions. [2021-11-23 02:44:20,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 416 transitions. [2021-11-23 02:44:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-23 02:44:20,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:20,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:20,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:44:20,954 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:20,955 INFO L85 PathProgramCache]: Analyzing trace with hash 627043477, now seen corresponding path program 1 times [2021-11-23 02:44:20,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:20,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309491429] [2021-11-23 02:44:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:20,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:21,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:21,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309491429] [2021-11-23 02:44:21,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309491429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:21,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:21,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:44:21,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342974804] [2021-11-23 02:44:21,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:21,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:21,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:21,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:21,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:21,034 INFO L87 Difference]: Start difference. First operand 333 states and 416 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:21,137 INFO L93 Difference]: Finished difference Result 562 states and 724 transitions. [2021-11-23 02:44:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:21,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-11-23 02:44:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:21,141 INFO L225 Difference]: With dead ends: 562 [2021-11-23 02:44:21,141 INFO L226 Difference]: Without dead ends: 418 [2021-11-23 02:44:21,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:21,144 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 57 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:21,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 322 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:21,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-23 02:44:21,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 400. [2021-11-23 02:44:21,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.255639097744361) internal successors, (501), 399 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:21,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 501 transitions. [2021-11-23 02:44:21,214 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 501 transitions. Word has length 119 [2021-11-23 02:44:21,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:21,215 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 501 transitions. [2021-11-23 02:44:21,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:21,215 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 501 transitions. [2021-11-23 02:44:21,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 02:44:21,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:21,217 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:21,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:44:21,217 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:21,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:21,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1282013094, now seen corresponding path program 1 times [2021-11-23 02:44:21,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:21,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554646497] [2021-11-23 02:44:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:21,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:21,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:21,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554646497] [2021-11-23 02:44:21,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554646497] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:21,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:21,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:44:21,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957997938] [2021-11-23 02:44:21,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:21,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:21,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:21,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:21,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:21,284 INFO L87 Difference]: Start difference. First operand 400 states and 501 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:21,409 INFO L93 Difference]: Finished difference Result 766 states and 995 transitions. [2021-11-23 02:44:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:21,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-23 02:44:21,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:21,413 INFO L225 Difference]: With dead ends: 766 [2021-11-23 02:44:21,413 INFO L226 Difference]: Without dead ends: 571 [2021-11-23 02:44:21,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:21,415 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 52 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:21,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 316 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:21,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-23 02:44:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 549. [2021-11-23 02:44:21,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.281021897810219) internal successors, (702), 548 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 702 transitions. [2021-11-23 02:44:21,499 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 702 transitions. Word has length 122 [2021-11-23 02:44:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:21,499 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 702 transitions. [2021-11-23 02:44:21,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 702 transitions. [2021-11-23 02:44:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:44:21,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:21,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:21,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:44:21,502 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:21,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:21,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1993001682, now seen corresponding path program 1 times [2021-11-23 02:44:21,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:21,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416266293] [2021-11-23 02:44:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:21,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:21,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:21,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416266293] [2021-11-23 02:44:21,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416266293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:21,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:21,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:44:21,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672601570] [2021-11-23 02:44:21,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:21,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:21,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:21,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:21,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:21,571 INFO L87 Difference]: Start difference. First operand 549 states and 702 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:21,767 INFO L93 Difference]: Finished difference Result 1207 states and 1589 transitions. [2021-11-23 02:44:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:21,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-23 02:44:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:21,773 INFO L225 Difference]: With dead ends: 1207 [2021-11-23 02:44:21,773 INFO L226 Difference]: Without dead ends: 869 [2021-11-23 02:44:21,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:21,775 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 47 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:21,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 309 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:21,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-11-23 02:44:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 835. [2021-11-23 02:44:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 1.3009592326139088) internal successors, (1085), 834 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:21,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1085 transitions. [2021-11-23 02:44:21,901 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1085 transitions. Word has length 125 [2021-11-23 02:44:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:21,901 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1085 transitions. [2021-11-23 02:44:21,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1085 transitions. [2021-11-23 02:44:21,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 02:44:21,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:21,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:21,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:44:21,904 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:21,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:21,905 INFO L85 PathProgramCache]: Analyzing trace with hash -378984628, now seen corresponding path program 1 times [2021-11-23 02:44:21,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:21,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45804700] [2021-11-23 02:44:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:21,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:21,998 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:21,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45804700] [2021-11-23 02:44:21,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45804700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:21,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:21,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:44:21,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727884263] [2021-11-23 02:44:22,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:22,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:22,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:22,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:22,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:22,001 INFO L87 Difference]: Start difference. First operand 835 states and 1085 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:22,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:22,267 INFO L93 Difference]: Finished difference Result 2059 states and 2732 transitions. [2021-11-23 02:44:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:22,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-23 02:44:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:22,276 INFO L225 Difference]: With dead ends: 2059 [2021-11-23 02:44:22,277 INFO L226 Difference]: Without dead ends: 1441 [2021-11-23 02:44:22,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:22,281 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 42 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:22,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 302 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-11-23 02:44:22,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1383. [2021-11-23 02:44:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.3140376266280753) internal successors, (1816), 1382 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:22,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1816 transitions. [2021-11-23 02:44:22,499 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1816 transitions. Word has length 128 [2021-11-23 02:44:22,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:22,499 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 1816 transitions. [2021-11-23 02:44:22,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1816 transitions. [2021-11-23 02:44:22,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-23 02:44:22,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:22,501 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:22,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:44:22,502 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:22,503 INFO L85 PathProgramCache]: Analyzing trace with hash 830726985, now seen corresponding path program 1 times [2021-11-23 02:44:22,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:22,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610439841] [2021-11-23 02:44:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:22,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:22,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:22,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610439841] [2021-11-23 02:44:22,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610439841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:22,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:22,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:44:22,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401561445] [2021-11-23 02:44:22,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:22,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:22,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:22,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:22,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:22,580 INFO L87 Difference]: Start difference. First operand 1383 states and 1816 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:23,003 INFO L93 Difference]: Finished difference Result 3697 states and 4919 transitions. [2021-11-23 02:44:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-23 02:44:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:23,019 INFO L225 Difference]: With dead ends: 3697 [2021-11-23 02:44:23,019 INFO L226 Difference]: Without dead ends: 2537 [2021-11-23 02:44:23,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:23,022 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 37 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:23,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 295 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-11-23 02:44:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2431. [2021-11-23 02:44:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2431 states, 2430 states have (on average 1.319753086419753) internal successors, (3207), 2430 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2431 states to 2431 states and 3207 transitions. [2021-11-23 02:44:23,425 INFO L78 Accepts]: Start accepts. Automaton has 2431 states and 3207 transitions. Word has length 131 [2021-11-23 02:44:23,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:23,426 INFO L470 AbstractCegarLoop]: Abstraction has 2431 states and 3207 transitions. [2021-11-23 02:44:23,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2431 states and 3207 transitions. [2021-11-23 02:44:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 02:44:23,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:23,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:23,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:44:23,428 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:23,429 INFO L85 PathProgramCache]: Analyzing trace with hash -667416480, now seen corresponding path program 1 times [2021-11-23 02:44:23,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:23,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2456419] [2021-11-23 02:44:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:23,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:23,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:23,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2456419] [2021-11-23 02:44:23,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2456419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:23,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:23,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:44:23,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671923961] [2021-11-23 02:44:23,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:23,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:23,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:23,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:23,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:23,496 INFO L87 Difference]: Start difference. First operand 2431 states and 3207 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:24,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:24,278 INFO L93 Difference]: Finished difference Result 6835 states and 9086 transitions. [2021-11-23 02:44:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:24,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-11-23 02:44:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:24,305 INFO L225 Difference]: With dead ends: 6835 [2021-11-23 02:44:24,305 INFO L226 Difference]: Without dead ends: 4633 [2021-11-23 02:44:24,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:24,312 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 32 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:24,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 288 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:24,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-11-23 02:44:24,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4431. [2021-11-23 02:44:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4431 states, 4430 states have (on average 1.3196388261851015) internal successors, (5846), 4430 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4431 states to 4431 states and 5846 transitions. [2021-11-23 02:44:24,995 INFO L78 Accepts]: Start accepts. Automaton has 4431 states and 5846 transitions. Word has length 134 [2021-11-23 02:44:24,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:24,995 INFO L470 AbstractCegarLoop]: Abstraction has 4431 states and 5846 transitions. [2021-11-23 02:44:24,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:24,996 INFO L276 IsEmpty]: Start isEmpty. Operand 4431 states and 5846 transitions. [2021-11-23 02:44:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-23 02:44:24,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:24,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:24,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:44:24,998 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:24,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:24,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1405598606, now seen corresponding path program 1 times [2021-11-23 02:44:24,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:24,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211870964] [2021-11-23 02:44:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:24,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:44:25,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:25,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211870964] [2021-11-23 02:44:25,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211870964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:25,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:25,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:44:25,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087311391] [2021-11-23 02:44:25,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:25,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:25,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:25,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:25,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:25,092 INFO L87 Difference]: Start difference. First operand 4431 states and 5846 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:26,265 INFO L93 Difference]: Finished difference Result 12866 states and 17048 transitions. [2021-11-23 02:44:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:26,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-23 02:44:26,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:26,313 INFO L225 Difference]: With dead ends: 12866 [2021-11-23 02:44:26,313 INFO L226 Difference]: Without dead ends: 8670 [2021-11-23 02:44:26,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:26,322 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 29 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:26,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 291 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:44:26,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8670 states. [2021-11-23 02:44:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8670 to 8276. [2021-11-23 02:44:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8276 states, 8275 states have (on average 1.3157703927492448) internal successors, (10888), 8275 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 10888 transitions. [2021-11-23 02:44:27,710 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 10888 transitions. Word has length 137 [2021-11-23 02:44:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:27,711 INFO L470 AbstractCegarLoop]: Abstraction has 8276 states and 10888 transitions. [2021-11-23 02:44:27,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 10888 transitions. [2021-11-23 02:44:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-23 02:44:27,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:27,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:27,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:44:27,713 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:27,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:27,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1206463893, now seen corresponding path program 1 times [2021-11-23 02:44:27,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:27,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183161778] [2021-11-23 02:44:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:27,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:44:27,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:27,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183161778] [2021-11-23 02:44:27,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183161778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:27,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:27,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:44:27,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818827390] [2021-11-23 02:44:27,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:27,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:44:27,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:27,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:44:27,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:27,773 INFO L87 Difference]: Start difference. First operand 8276 states and 10888 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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) [2021-11-23 02:44:29,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:29,030 INFO L93 Difference]: Finished difference Result 16276 states and 21444 transitions. [2021-11-23 02:44:29,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:44:29,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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 142 [2021-11-23 02:44:29,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:29,068 INFO L225 Difference]: With dead ends: 16276 [2021-11-23 02:44:29,068 INFO L226 Difference]: Without dead ends: 8098 [2021-11-23 02:44:29,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:44:29,079 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 60 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:29,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 332 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:44:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8098 states. [2021-11-23 02:44:30,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8098 to 7654. [2021-11-23 02:44:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7654 states, 7653 states have (on average 1.3009277407552593) internal successors, (9956), 7653 states have internal predecessors, (9956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:44:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7654 states to 7654 states and 9956 transitions. [2021-11-23 02:44:30,185 INFO L78 Accepts]: Start accepts. Automaton has 7654 states and 9956 transitions. Word has length 142 [2021-11-23 02:44:30,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:30,186 INFO L470 AbstractCegarLoop]: Abstraction has 7654 states and 9956 transitions. [2021-11-23 02:44:30,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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) [2021-11-23 02:44:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 7654 states and 9956 transitions. [2021-11-23 02:44:30,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 02:44:30,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:30,187 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:44:30,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:44:30,187 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:30,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:30,188 INFO L85 PathProgramCache]: Analyzing trace with hash 293070734, now seen corresponding path program 1 times [2021-11-23 02:44:30,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:30,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326476809] [2021-11-23 02:44:30,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:30,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat