./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.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_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/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_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/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_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/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 37da121d1485cf4d7db5098d27ad9010a5336c778943ff6fd7c53fe4a9fdfbdc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:40:20,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:40:20,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:40:21,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:40:21,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:40:21,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:40:21,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:40:21,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:40:21,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:40:21,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:40:21,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:40:21,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:40:21,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:40:21,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:40:21,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:40:21,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:40:21,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:40:21,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:40:21,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:40:21,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:40:21,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:40:21,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:40:21,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:40:21,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:40:21,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:40:21,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:40:21,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:40:21,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:40:21,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:40:21,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:40:21,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:40:21,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:40:21,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:40:21,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:40:21,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:40:21,106 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:40:21,107 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:40:21,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:40:21,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:40:21,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:40:21,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:40:21,110 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:40:21,153 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:40:21,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:40:21,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:40:21,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:40:21,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:40:21,162 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:40:21,162 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:40:21,163 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:40:21,163 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:40:21,163 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:40:21,164 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:40:21,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:40:21,165 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:40:21,165 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:40:21,165 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:40:21,166 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:40:21,166 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:40:21,166 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:40:21,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:40:21,168 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:40:21,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:40:21,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:40:21,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:40:21,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:40:21,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:40:21,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:40:21,171 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:40:21,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:40:21,172 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:40:21,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:40:21,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:40:21,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:40:21,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:40:21,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:40:21,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:40:21,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:40:21,174 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:40:21,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:40:21,175 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:40:21,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:40:21,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:40:21,175 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_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37da121d1485cf4d7db5098d27ad9010a5336c778943ff6fd7c53fe4a9fdfbdc [2021-11-23 02:40:21,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:40:21,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:40:21,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:40:21,469 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:40:21,470 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:40:21,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 02:40:21,537 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/bin/utaipan-EQgc7hIp5V/data/deaaa9c72/9b5397ab9a764b068bb71669d1e67c3f/FLAGcf49af21b [2021-11-23 02:40:22,103 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:40:22,104 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 02:40:22,117 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/bin/utaipan-EQgc7hIp5V/data/deaaa9c72/9b5397ab9a764b068bb71669d1e67c3f/FLAGcf49af21b [2021-11-23 02:40:22,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/bin/utaipan-EQgc7hIp5V/data/deaaa9c72/9b5397ab9a764b068bb71669d1e67c3f [2021-11-23 02:40:22,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:40:22,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:40:22,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:40:22,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:40:22,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:40:22,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:40:22" (1/1) ... [2021-11-23 02:40:22,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@588d9170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:22, skipping insertion in model container [2021-11-23 02:40:22,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:40:22" (1/1) ... [2021-11-23 02:40:22,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:40:22,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:40:22,741 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_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8458,8471] [2021-11-23 02:40:22,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:40:22,828 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:40:22,909 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_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8458,8471] [2021-11-23 02:40:23,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:40:23,075 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:40:23,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:23 WrapperNode [2021-11-23 02:40:23,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:40:23,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:40:23,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:40:23,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:40:23,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:23" (1/1) ... [2021-11-23 02:40:23,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:23" (1/1) ... [2021-11-23 02:40:23,164 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 790 [2021-11-23 02:40:23,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:40:23,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:40:23,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:40:23,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:40:23,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:23" (1/1) ... [2021-11-23 02:40:23,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:23" (1/1) ... [2021-11-23 02:40:23,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:23" (1/1) ... [2021-11-23 02:40:23,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:23" (1/1) ... [2021-11-23 02:40:23,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:23" (1/1) ... [2021-11-23 02:40:23,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:23" (1/1) ... [2021-11-23 02:40:23,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:23" (1/1) ... [2021-11-23 02:40:23,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:40:23,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:40:23,240 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:40:23,240 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:40:23,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:23" (1/1) ... [2021-11-23 02:40:23,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:40:23,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:40:23,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:40:23,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c54d246-1ac8-4c04-a194-3cde0b55a3c1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:40:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:40:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:40:23,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:40:23,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:40:23,525 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:40:23,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:40:24,394 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:40:24,589 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:40:24,590 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:40:24,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:40:24 BoogieIcfgContainer [2021-11-23 02:40:24,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:40:24,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:40:24,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:40:24,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:40:24,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:40:22" (1/3) ... [2021-11-23 02:40:24,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139287ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:40:24, skipping insertion in model container [2021-11-23 02:40:24,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:23" (2/3) ... [2021-11-23 02:40:24,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139287ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:40:24, skipping insertion in model container [2021-11-23 02:40:24,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:40:24" (3/3) ... [2021-11-23 02:40:24,603 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-23 02:40:24,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:40:24,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:40:24,680 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:40:24,689 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 02:40:24,689 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:40:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 0 states have call successors, (0), 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 02:40:24,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 02:40:24,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:24,719 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] [2021-11-23 02:40:24,720 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash -557134959, now seen corresponding path program 1 times [2021-11-23 02:40:24,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:24,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648280537] [2021-11-23 02:40:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:24,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:25,399 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 02:40:25,400 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:25,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648280537] [2021-11-23 02:40:25,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648280537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:25,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:25,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:40:25,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769970271] [2021-11-23 02:40:25,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:25,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:40:25,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:25,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:40:25,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:40:25,460 INFO L87 Difference]: Start difference. First operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 0 states have call successors, (0), 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 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 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 02:40:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:25,941 INFO L93 Difference]: Finished difference Result 564 states and 904 transitions. [2021-11-23 02:40:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:40:25,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-23 02:40:25,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:25,961 INFO L225 Difference]: With dead ends: 564 [2021-11-23 02:40:25,961 INFO L226 Difference]: Without dead ends: 469 [2021-11-23 02:40:25,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:40:25,969 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 702 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:25,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [702 Valid, 1349 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:40:25,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-23 02:40:26,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 461. [2021-11-23 02:40:26,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4152173913043478) internal successors, (651), 460 states have internal predecessors, (651), 0 states have call successors, (0), 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 02:40:26,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 651 transitions. [2021-11-23 02:40:26,063 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 651 transitions. Word has length 67 [2021-11-23 02:40:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:26,063 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 651 transitions. [2021-11-23 02:40:26,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 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 02:40:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 651 transitions. [2021-11-23 02:40:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 02:40:26,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:26,069 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] [2021-11-23 02:40:26,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:40:26,070 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:26,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:26,071 INFO L85 PathProgramCache]: Analyzing trace with hash -707625794, now seen corresponding path program 1 times [2021-11-23 02:40:26,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:26,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446844428] [2021-11-23 02:40:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:26,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:26,197 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 02:40:26,198 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:26,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446844428] [2021-11-23 02:40:26,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446844428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:26,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:26,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:40:26,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12176015] [2021-11-23 02:40:26,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:26,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:40:26,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:26,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:40:26,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:40:26,202 INFO L87 Difference]: Start difference. First operand 461 states and 651 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:40:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:26,629 INFO L93 Difference]: Finished difference Result 1109 states and 1611 transitions. [2021-11-23 02:40:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:40:26,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-23 02:40:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:26,635 INFO L225 Difference]: With dead ends: 1109 [2021-11-23 02:40:26,636 INFO L226 Difference]: Without dead ends: 728 [2021-11-23 02:40:26,646 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 02:40:26,648 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 565 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:26,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 234 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:40:26,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-11-23 02:40:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2021-11-23 02:40:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.446896551724138) internal successors, (1049), 725 states have internal predecessors, (1049), 0 states have call successors, (0), 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 02:40:26,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1049 transitions. [2021-11-23 02:40:26,738 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1049 transitions. Word has length 68 [2021-11-23 02:40:26,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:26,739 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 1049 transitions. [2021-11-23 02:40:26,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:40:26,739 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1049 transitions. [2021-11-23 02:40:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 02:40:26,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:26,742 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] [2021-11-23 02:40:26,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:40:26,742 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:26,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:26,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1204520307, now seen corresponding path program 1 times [2021-11-23 02:40:26,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:26,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110498032] [2021-11-23 02:40:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:26,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:26,887 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 02:40:26,888 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:26,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110498032] [2021-11-23 02:40:26,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110498032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:26,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:26,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:40:26,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927143728] [2021-11-23 02:40:26,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:26,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:40:26,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:26,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:40:26,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:40:26,917 INFO L87 Difference]: Start difference. First operand 726 states and 1049 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:40:27,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:27,323 INFO L93 Difference]: Finished difference Result 1874 states and 2770 transitions. [2021-11-23 02:40:27,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:40:27,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-23 02:40:27,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:27,334 INFO L225 Difference]: With dead ends: 1874 [2021-11-23 02:40:27,334 INFO L226 Difference]: Without dead ends: 1258 [2021-11-23 02:40:27,336 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 02:40:27,344 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 548 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:27,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 242 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:40:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-11-23 02:40:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1256. [2021-11-23 02:40:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 1.4685258964143426) internal successors, (1843), 1255 states have internal predecessors, (1843), 0 states have call successors, (0), 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 02:40:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1843 transitions. [2021-11-23 02:40:27,478 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1843 transitions. Word has length 68 [2021-11-23 02:40:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:27,479 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1843 transitions. [2021-11-23 02:40:27,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:40:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1843 transitions. [2021-11-23 02:40:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 02:40:27,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:27,484 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] [2021-11-23 02:40:27,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:40:27,485 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:27,486 INFO L85 PathProgramCache]: Analyzing trace with hash 701000348, now seen corresponding path program 1 times [2021-11-23 02:40:27,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:27,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80254827] [2021-11-23 02:40:27,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:27,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:27,602 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 02:40:27,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:27,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80254827] [2021-11-23 02:40:27,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80254827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:27,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:27,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:40:27,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127291410] [2021-11-23 02:40:27,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:27,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:40:27,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:27,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:40:27,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:40:27,606 INFO L87 Difference]: Start difference. First operand 1256 states and 1843 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:40:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:28,024 INFO L93 Difference]: Finished difference Result 3430 states and 5115 transitions. [2021-11-23 02:40:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:40:28,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-23 02:40:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:28,040 INFO L225 Difference]: With dead ends: 3430 [2021-11-23 02:40:28,041 INFO L226 Difference]: Without dead ends: 2318 [2021-11-23 02:40:28,044 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 02:40:28,051 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 566 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:28,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 243 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:40:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-11-23 02:40:28,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2316. [2021-11-23 02:40:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 1.4807775377969763) internal successors, (3428), 2315 states have internal predecessors, (3428), 0 states have call successors, (0), 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 02:40:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3428 transitions. [2021-11-23 02:40:28,271 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3428 transitions. Word has length 68 [2021-11-23 02:40:28,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:28,272 INFO L470 AbstractCegarLoop]: Abstraction has 2316 states and 3428 transitions. [2021-11-23 02:40:28,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:40:28,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3428 transitions. [2021-11-23 02:40:28,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 02:40:28,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:28,283 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] [2021-11-23 02:40:28,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:40:28,283 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:28,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:28,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1467478319, now seen corresponding path program 1 times [2021-11-23 02:40:28,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:28,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224549401] [2021-11-23 02:40:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:28,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:28,390 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 02:40:28,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:28,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224549401] [2021-11-23 02:40:28,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224549401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:28,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:28,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:40:28,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124338288] [2021-11-23 02:40:28,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:28,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:40:28,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:28,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:40:28,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:40:28,392 INFO L87 Difference]: Start difference. First operand 2316 states and 3428 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:40:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:28,998 INFO L93 Difference]: Finished difference Result 6697 states and 9989 transitions. [2021-11-23 02:40:28,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:40:28,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-23 02:40:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:29,034 INFO L225 Difference]: With dead ends: 6697 [2021-11-23 02:40:29,034 INFO L226 Difference]: Without dead ends: 4438 [2021-11-23 02:40:29,044 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 02:40:29,045 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 558 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:29,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 226 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:40:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-11-23 02:40:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 4436. [2021-11-23 02:40:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 1.4793686583990981) internal successors, (6561), 4435 states have internal predecessors, (6561), 0 states have call successors, (0), 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 02:40:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 6561 transitions. [2021-11-23 02:40:29,487 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 6561 transitions. Word has length 68 [2021-11-23 02:40:29,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:29,488 INFO L470 AbstractCegarLoop]: Abstraction has 4436 states and 6561 transitions. [2021-11-23 02:40:29,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:40:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 6561 transitions. [2021-11-23 02:40:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 02:40:29,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:29,497 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] [2021-11-23 02:40:29,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:40:29,498 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:29,499 INFO L85 PathProgramCache]: Analyzing trace with hash -303409184, now seen corresponding path program 1 times [2021-11-23 02:40:29,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:29,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295068625] [2021-11-23 02:40:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:29,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:29,619 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 02:40:29,620 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295068625] [2021-11-23 02:40:29,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295068625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:29,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:29,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:40:29,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139593511] [2021-11-23 02:40:29,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:29,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:40:29,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:29,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:40:29,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:40:29,622 INFO L87 Difference]: Start difference. First operand 4436 states and 6561 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:40:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:30,512 INFO L93 Difference]: Finished difference Result 12353 states and 18326 transitions. [2021-11-23 02:40:30,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:40:30,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-23 02:40:30,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:30,562 INFO L225 Difference]: With dead ends: 12353 [2021-11-23 02:40:30,562 INFO L226 Difference]: Without dead ends: 7958 [2021-11-23 02:40:30,570 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 02:40:30,571 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 563 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:30,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 218 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:40:30,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2021-11-23 02:40:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7956. [2021-11-23 02:40:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7956 states, 7955 states have (on average 1.4681332495285984) internal successors, (11679), 7955 states have internal predecessors, (11679), 0 states have call successors, (0), 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 02:40:31,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7956 states to 7956 states and 11679 transitions. [2021-11-23 02:40:31,326 INFO L78 Accepts]: Start accepts. Automaton has 7956 states and 11679 transitions. Word has length 68 [2021-11-23 02:40:31,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:31,327 INFO L470 AbstractCegarLoop]: Abstraction has 7956 states and 11679 transitions. [2021-11-23 02:40:31,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:40:31,328 INFO L276 IsEmpty]: Start isEmpty. Operand 7956 states and 11679 transitions. [2021-11-23 02:40:31,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:40:31,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:31,329 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] [2021-11-23 02:40:31,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:40:31,330 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:31,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:31,331 INFO L85 PathProgramCache]: Analyzing trace with hash 281865989, now seen corresponding path program 1 times [2021-11-23 02:40:31,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:31,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340723352] [2021-11-23 02:40:31,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:31,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:32,286 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 02:40:32,286 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:32,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340723352] [2021-11-23 02:40:32,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340723352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:32,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:32,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-23 02:40:32,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120575327] [2021-11-23 02:40:32,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:32,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:40:32,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:32,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:40:32,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:40:32,288 INFO L87 Difference]: Start difference. First operand 7956 states and 11679 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:40:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:34,831 INFO L93 Difference]: Finished difference Result 15362 states and 22455 transitions. [2021-11-23 02:40:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 02:40:34,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-23 02:40:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:34,909 INFO L225 Difference]: With dead ends: 15362 [2021-11-23 02:40:34,910 INFO L226 Difference]: Without dead ends: 15360 [2021-11-23 02:40:34,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:40:34,916 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 904 mSDsluCounter, 2281 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:34,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 2513 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:40:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15360 states. [2021-11-23 02:40:36,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15360 to 12609. [2021-11-23 02:40:36,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12609 states, 12608 states have (on average 1.460977157360406) internal successors, (18420), 12608 states have internal predecessors, (18420), 0 states have call successors, (0), 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 02:40:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12609 states to 12609 states and 18420 transitions. [2021-11-23 02:40:36,241 INFO L78 Accepts]: Start accepts. Automaton has 12609 states and 18420 transitions. Word has length 69 [2021-11-23 02:40:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:36,242 INFO L470 AbstractCegarLoop]: Abstraction has 12609 states and 18420 transitions. [2021-11-23 02:40:36,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:40:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 12609 states and 18420 transitions. [2021-11-23 02:40:36,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:40:36,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:36,251 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] [2021-11-23 02:40:36,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:40:36,251 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:36,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:36,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1396919579, now seen corresponding path program 1 times [2021-11-23 02:40:36,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:36,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062513968] [2021-11-23 02:40:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:36,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:37,032 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 02:40:37,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:37,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062513968] [2021-11-23 02:40:37,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062513968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:37,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:37,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-23 02:40:37,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817901136] [2021-11-23 02:40:37,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:37,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:40:37,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:37,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:40:37,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:40:37,037 INFO L87 Difference]: Start difference. First operand 12609 states and 18420 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:40:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:39,186 INFO L93 Difference]: Finished difference Result 17818 states and 25960 transitions. [2021-11-23 02:40:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 02:40:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-23 02:40:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:39,231 INFO L225 Difference]: With dead ends: 17818 [2021-11-23 02:40:39,231 INFO L226 Difference]: Without dead ends: 15832 [2021-11-23 02:40:39,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:40:39,241 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 853 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 2401 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:39,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 2401 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:40:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15832 states. [2021-11-23 02:40:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15832 to 14421. [2021-11-23 02:40:40,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14421 states, 14420 states have (on average 1.4582524271844661) internal successors, (21028), 14420 states have internal predecessors, (21028), 0 states have call successors, (0), 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 02:40:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14421 states to 14421 states and 21028 transitions. [2021-11-23 02:40:40,407 INFO L78 Accepts]: Start accepts. Automaton has 14421 states and 21028 transitions. Word has length 69 [2021-11-23 02:40:40,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:40,407 INFO L470 AbstractCegarLoop]: Abstraction has 14421 states and 21028 transitions. [2021-11-23 02:40:40,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:40:40,407 INFO L276 IsEmpty]: Start isEmpty. Operand 14421 states and 21028 transitions. [2021-11-23 02:40:40,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:40:40,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:40,409 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] [2021-11-23 02:40:40,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:40:40,410 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:40,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:40,410 INFO L85 PathProgramCache]: Analyzing trace with hash -864043323, now seen corresponding path program 1 times [2021-11-23 02:40:40,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:40,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806715704] [2021-11-23 02:40:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:40,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:41,072 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 02:40:41,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:41,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806715704] [2021-11-23 02:40:41,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806715704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:41,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:41,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-23 02:40:41,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495151855] [2021-11-23 02:40:41,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:41,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:40:41,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:41,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:40:41,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:40:41,075 INFO L87 Difference]: Start difference. First operand 14421 states and 21028 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:40:43,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:43,236 INFO L93 Difference]: Finished difference Result 17568 states and 25540 transitions. [2021-11-23 02:40:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 02:40:43,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-23 02:40:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:43,294 INFO L225 Difference]: With dead ends: 17568 [2021-11-23 02:40:43,294 INFO L226 Difference]: Without dead ends: 17566 [2021-11-23 02:40:43,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:40:43,302 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 812 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 2445 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:43,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 2445 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:40:43,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17566 states. [2021-11-23 02:40:44,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17566 to 14439. [2021-11-23 02:40:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14439 states, 14438 states have (on average 1.4578196426097798) internal successors, (21048), 14438 states have internal predecessors, (21048), 0 states have call successors, (0), 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 02:40:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14439 states to 14439 states and 21048 transitions. [2021-11-23 02:40:44,781 INFO L78 Accepts]: Start accepts. Automaton has 14439 states and 21048 transitions. Word has length 69 [2021-11-23 02:40:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:44,782 INFO L470 AbstractCegarLoop]: Abstraction has 14439 states and 21048 transitions. [2021-11-23 02:40:44,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:40:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 14439 states and 21048 transitions. [2021-11-23 02:40:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:40:44,784 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:44,784 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] [2021-11-23 02:40:44,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:40:44,784 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:44,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:44,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1059032283, now seen corresponding path program 1 times [2021-11-23 02:40:44,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:44,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488045510] [2021-11-23 02:40:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:44,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:45,483 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 02:40:45,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:45,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488045510] [2021-11-23 02:40:45,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488045510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:45,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:45,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-23 02:40:45,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964887328] [2021-11-23 02:40:45,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:45,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:40:45,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:45,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:40:45,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:40:45,486 INFO L87 Difference]: Start difference. First operand 14439 states and 21048 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:40:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:47,636 INFO L93 Difference]: Finished difference Result 25149 states and 36679 transitions. [2021-11-23 02:40:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:40:47,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-23 02:40:47,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:47,698 INFO L225 Difference]: With dead ends: 25149 [2021-11-23 02:40:47,699 INFO L226 Difference]: Without dead ends: 23163 [2021-11-23 02:40:47,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-11-23 02:40:47,713 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 966 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:47,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [966 Valid, 1726 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:40:47,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23163 states. [2021-11-23 02:40:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23163 to 17868. [2021-11-23 02:40:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17868 states, 17867 states have (on average 1.4546370403537248) internal successors, (25990), 17867 states have internal predecessors, (25990), 0 states have call successors, (0), 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 02:40:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17868 states to 17868 states and 25990 transitions. [2021-11-23 02:40:49,275 INFO L78 Accepts]: Start accepts. Automaton has 17868 states and 25990 transitions. Word has length 69 [2021-11-23 02:40:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:49,275 INFO L470 AbstractCegarLoop]: Abstraction has 17868 states and 25990 transitions. [2021-11-23 02:40:49,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:40:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 17868 states and 25990 transitions. [2021-11-23 02:40:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 02:40:49,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:49,277 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] [2021-11-23 02:40:49,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:40:49,277 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:49,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1126645573, now seen corresponding path program 1 times [2021-11-23 02:40:49,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:49,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654028033] [2021-11-23 02:40:49,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:49,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:49,984 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 02:40:49,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:49,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654028033] [2021-11-23 02:40:49,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654028033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:49,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:49,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-23 02:40:49,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210452153] [2021-11-23 02:40:49,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:49,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:40:49,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:49,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:40:49,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:40:49,987 INFO L87 Difference]: Start difference. First operand 17868 states and 25990 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:40:53,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:53,121 INFO L93 Difference]: Finished difference Result 32860 states and 47906 transitions. [2021-11-23 02:40:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:40:53,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-23 02:40:53,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:53,190 INFO L225 Difference]: With dead ends: 32860 [2021-11-23 02:40:53,190 INFO L226 Difference]: Without dead ends: 30874 [2021-11-23 02:40:53,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-11-23 02:40:53,208 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 897 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 2545 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:53,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 2545 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:40:53,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30874 states. [2021-11-23 02:40:54,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30874 to 19396. [2021-11-23 02:40:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19396 states, 19395 states have (on average 1.454189224026811) internal successors, (28204), 19395 states have internal predecessors, (28204), 0 states have call successors, (0), 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 02:40:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19396 states to 19396 states and 28204 transitions. [2021-11-23 02:40:54,868 INFO L78 Accepts]: Start accepts. Automaton has 19396 states and 28204 transitions. Word has length 69 [2021-11-23 02:40:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:54,868 INFO L470 AbstractCegarLoop]: Abstraction has 19396 states and 28204 transitions. [2021-11-23 02:40:54,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 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 02:40:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 19396 states and 28204 transitions. [2021-11-23 02:40:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:40:54,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:54,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:54,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:40:54,870 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:54,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:54,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1724107097, now seen corresponding path program 1 times [2021-11-23 02:40:54,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:54,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070960742] [2021-11-23 02:40:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:54,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:40:55,615 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 02:40:55,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:40:55,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070960742] [2021-11-23 02:40:55,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070960742] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:40:55,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:40:55,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-23 02:40:55,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328418411] [2021-11-23 02:40:55,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:40:55,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:40:55,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:40:55,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:40:55,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:40:55,617 INFO L87 Difference]: Start difference. First operand 19396 states and 28204 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:40:58,073 INFO L93 Difference]: Finished difference Result 26431 states and 38368 transitions. [2021-11-23 02:40:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 02:40:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 02:40:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:40:58,111 INFO L225 Difference]: With dead ends: 26431 [2021-11-23 02:40:58,112 INFO L226 Difference]: Without dead ends: 24445 [2021-11-23 02:40:58,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-11-23 02:40:58,126 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 971 mSDsluCounter, 2360 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:40:58,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 2670 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:40:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24445 states. [2021-11-23 02:40:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24445 to 19399. [2021-11-23 02:40:59,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19399 states, 19398 states have (on average 1.4541189813382822) internal successors, (28207), 19398 states have internal predecessors, (28207), 0 states have call successors, (0), 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 02:40:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19399 states to 19399 states and 28207 transitions. [2021-11-23 02:40:59,685 INFO L78 Accepts]: Start accepts. Automaton has 19399 states and 28207 transitions. Word has length 71 [2021-11-23 02:40:59,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:40:59,686 INFO L470 AbstractCegarLoop]: Abstraction has 19399 states and 28207 transitions. [2021-11-23 02:40:59,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:40:59,686 INFO L276 IsEmpty]: Start isEmpty. Operand 19399 states and 28207 transitions. [2021-11-23 02:40:59,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:40:59,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:40:59,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:40:59,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:40:59,689 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:40:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:40:59,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2037983943, now seen corresponding path program 1 times [2021-11-23 02:40:59,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:40:59,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346977747] [2021-11-23 02:40:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:40:59,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:40:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:00,406 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 02:41:00,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:00,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346977747] [2021-11-23 02:41:00,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346977747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:00,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:00,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-23 02:41:00,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872613329] [2021-11-23 02:41:00,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:00,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:41:00,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:41:00,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:41:00,409 INFO L87 Difference]: Start difference. First operand 19399 states and 28207 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:02,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:02,989 INFO L93 Difference]: Finished difference Result 26807 states and 38982 transitions. [2021-11-23 02:41:02,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:41:02,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 02:41:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:03,034 INFO L225 Difference]: With dead ends: 26807 [2021-11-23 02:41:03,034 INFO L226 Difference]: Without dead ends: 26805 [2021-11-23 02:41:03,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-11-23 02:41:03,040 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 931 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:03,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [931 Valid, 1933 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:41:03,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26805 states. [2021-11-23 02:41:04,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26805 to 19402. [2021-11-23 02:41:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19402 states, 19401 states have (on average 1.4540487603731767) internal successors, (28210), 19401 states have internal predecessors, (28210), 0 states have call successors, (0), 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 02:41:04,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19402 states to 19402 states and 28210 transitions. [2021-11-23 02:41:04,814 INFO L78 Accepts]: Start accepts. Automaton has 19402 states and 28210 transitions. Word has length 71 [2021-11-23 02:41:04,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:04,814 INFO L470 AbstractCegarLoop]: Abstraction has 19402 states and 28210 transitions. [2021-11-23 02:41:04,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 19402 states and 28210 transitions. [2021-11-23 02:41:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:41:04,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:04,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:04,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:41:04,817 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:04,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:04,818 INFO L85 PathProgramCache]: Analyzing trace with hash -443211495, now seen corresponding path program 1 times [2021-11-23 02:41:04,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:04,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282133935] [2021-11-23 02:41:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:04,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:05,684 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 02:41:05,684 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:05,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282133935] [2021-11-23 02:41:05,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282133935] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:05,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:05,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-23 02:41:05,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360666532] [2021-11-23 02:41:05,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:05,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:41:05,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:05,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:41:05,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:41:05,686 INFO L87 Difference]: Start difference. First operand 19402 states and 28210 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:08,409 INFO L93 Difference]: Finished difference Result 24542 states and 35568 transitions. [2021-11-23 02:41:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:41:08,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 02:41:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:08,444 INFO L225 Difference]: With dead ends: 24542 [2021-11-23 02:41:08,444 INFO L226 Difference]: Without dead ends: 24540 [2021-11-23 02:41:08,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:41:08,450 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 878 mSDsluCounter, 2653 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:08,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 3032 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:41:08,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24540 states. [2021-11-23 02:41:09,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24540 to 20406. [2021-11-23 02:41:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20406 states, 20405 states have (on average 1.4522420975251165) internal successors, (29633), 20405 states have internal predecessors, (29633), 0 states have call successors, (0), 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 02:41:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20406 states to 20406 states and 29633 transitions. [2021-11-23 02:41:09,950 INFO L78 Accepts]: Start accepts. Automaton has 20406 states and 29633 transitions. Word has length 71 [2021-11-23 02:41:09,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:09,950 INFO L470 AbstractCegarLoop]: Abstraction has 20406 states and 29633 transitions. [2021-11-23 02:41:09,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:09,950 INFO L276 IsEmpty]: Start isEmpty. Operand 20406 states and 29633 transitions. [2021-11-23 02:41:09,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:41:09,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:09,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:09,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:41:09,952 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:09,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:09,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1005125223, now seen corresponding path program 1 times [2021-11-23 02:41:09,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:09,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121394166] [2021-11-23 02:41:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:09,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:10,788 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 02:41:10,789 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:10,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121394166] [2021-11-23 02:41:10,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121394166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:10,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:10,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-23 02:41:10,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262726868] [2021-11-23 02:41:10,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:10,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 02:41:10,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:10,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 02:41:10,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:41:10,792 INFO L87 Difference]: Start difference. First operand 20406 states and 29633 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:13,857 INFO L93 Difference]: Finished difference Result 34296 states and 49832 transitions. [2021-11-23 02:41:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 02:41:13,858 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 02:41:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:13,900 INFO L225 Difference]: With dead ends: 34296 [2021-11-23 02:41:13,900 INFO L226 Difference]: Without dead ends: 26678 [2021-11-23 02:41:13,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:41:13,915 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 861 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:13,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1851 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:41:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26678 states. [2021-11-23 02:41:15,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26678 to 23000. [2021-11-23 02:41:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23000 states, 22999 states have (on average 1.4498021653115354) internal successors, (33344), 22999 states have internal predecessors, (33344), 0 states have call successors, (0), 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 02:41:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23000 states to 23000 states and 33344 transitions. [2021-11-23 02:41:15,606 INFO L78 Accepts]: Start accepts. Automaton has 23000 states and 33344 transitions. Word has length 71 [2021-11-23 02:41:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:15,607 INFO L470 AbstractCegarLoop]: Abstraction has 23000 states and 33344 transitions. [2021-11-23 02:41:15,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 23000 states and 33344 transitions. [2021-11-23 02:41:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:41:15,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:15,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:15,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:41:15,609 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:15,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:15,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2143932761, now seen corresponding path program 1 times [2021-11-23 02:41:15,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:15,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013380440] [2021-11-23 02:41:15,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:15,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:16,574 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 02:41:16,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:16,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013380440] [2021-11-23 02:41:16,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013380440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:16,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:16,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-11-23 02:41:16,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351654070] [2021-11-23 02:41:16,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:16,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 02:41:16,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:16,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 02:41:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:41:16,576 INFO L87 Difference]: Start difference. First operand 23000 states and 33344 transitions. Second operand has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:20,539 INFO L93 Difference]: Finished difference Result 28165 states and 40728 transitions. [2021-11-23 02:41:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 02:41:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 02:41:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:20,592 INFO L225 Difference]: With dead ends: 28165 [2021-11-23 02:41:20,592 INFO L226 Difference]: Without dead ends: 28163 [2021-11-23 02:41:20,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 02:41:20,604 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 1152 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 2475 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 2496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:20,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 2182 Invalid, 2496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2475 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 02:41:20,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28163 states. [2021-11-23 02:41:22,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28163 to 23004. [2021-11-23 02:41:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23004 states, 23003 states have (on average 1.4498108942311871) internal successors, (33350), 23003 states have internal predecessors, (33350), 0 states have call successors, (0), 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 02:41:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23004 states to 23004 states and 33350 transitions. [2021-11-23 02:41:22,584 INFO L78 Accepts]: Start accepts. Automaton has 23004 states and 33350 transitions. Word has length 71 [2021-11-23 02:41:22,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:22,585 INFO L470 AbstractCegarLoop]: Abstraction has 23004 states and 33350 transitions. [2021-11-23 02:41:22,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.227272727272727) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:22,586 INFO L276 IsEmpty]: Start isEmpty. Operand 23004 states and 33350 transitions. [2021-11-23 02:41:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:41:22,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:22,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:22,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:41:22,588 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:22,589 INFO L85 PathProgramCache]: Analyzing trace with hash -807713351, now seen corresponding path program 1 times [2021-11-23 02:41:22,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:22,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092653363] [2021-11-23 02:41:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:22,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:23,767 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 02:41:23,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:23,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092653363] [2021-11-23 02:41:23,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092653363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:23,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:23,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-23 02:41:23,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910417272] [2021-11-23 02:41:23,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:23,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:41:23,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:23,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:41:23,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:41:23,769 INFO L87 Difference]: Start difference. First operand 23004 states and 33350 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:28,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:28,718 INFO L93 Difference]: Finished difference Result 33295 states and 48203 transitions. [2021-11-23 02:41:28,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 02:41:28,722 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 02:41:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:28,775 INFO L225 Difference]: With dead ends: 33295 [2021-11-23 02:41:28,775 INFO L226 Difference]: Without dead ends: 31309 [2021-11-23 02:41:28,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=346, Invalid=1460, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 02:41:28,785 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 1535 mSDsluCounter, 1830 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1535 SdHoareTripleChecker+Valid, 1992 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:28,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1535 Valid, 1992 Invalid, 2500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 02:41:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31309 states. [2021-11-23 02:41:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31309 to 23027. [2021-11-23 02:41:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23027 states, 23026 states have (on average 1.4495353079127942) internal successors, (33377), 23026 states have internal predecessors, (33377), 0 states have call successors, (0), 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 02:41:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23027 states to 23027 states and 33377 transitions. [2021-11-23 02:41:30,706 INFO L78 Accepts]: Start accepts. Automaton has 23027 states and 33377 transitions. Word has length 71 [2021-11-23 02:41:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:30,706 INFO L470 AbstractCegarLoop]: Abstraction has 23027 states and 33377 transitions. [2021-11-23 02:41:30,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:30,707 INFO L276 IsEmpty]: Start isEmpty. Operand 23027 states and 33377 transitions. [2021-11-23 02:41:30,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:41:30,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:30,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:30,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:41:30,710 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:30,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:30,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1953622663, now seen corresponding path program 1 times [2021-11-23 02:41:30,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:30,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765191579] [2021-11-23 02:41:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:30,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:31,404 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 02:41:31,404 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:31,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765191579] [2021-11-23 02:41:31,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765191579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:31,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:31,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-23 02:41:31,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679167648] [2021-11-23 02:41:31,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:31,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:41:31,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:31,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:41:31,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:41:31,407 INFO L87 Difference]: Start difference. First operand 23027 states and 33377 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:35,767 INFO L93 Difference]: Finished difference Result 41544 states and 60343 transitions. [2021-11-23 02:41:35,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 02:41:35,768 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 02:41:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:35,846 INFO L225 Difference]: With dead ends: 41544 [2021-11-23 02:41:35,847 INFO L226 Difference]: Without dead ends: 41542 [2021-11-23 02:41:35,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-11-23 02:41:35,865 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 853 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1924 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:35,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 1924 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:41:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41542 states. [2021-11-23 02:41:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41542 to 26181. [2021-11-23 02:41:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26181 states, 26180 states have (on average 1.4517188693659282) internal successors, (38006), 26180 states have internal predecessors, (38006), 0 states have call successors, (0), 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 02:41:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26181 states to 26181 states and 38006 transitions. [2021-11-23 02:41:38,378 INFO L78 Accepts]: Start accepts. Automaton has 26181 states and 38006 transitions. Word has length 71 [2021-11-23 02:41:38,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:38,378 INFO L470 AbstractCegarLoop]: Abstraction has 26181 states and 38006 transitions. [2021-11-23 02:41:38,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 26181 states and 38006 transitions. [2021-11-23 02:41:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:41:38,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:38,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:41:38,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:41:38,382 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2146355673, now seen corresponding path program 1 times [2021-11-23 02:41:38,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:38,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215131113] [2021-11-23 02:41:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:38,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:39,178 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 02:41:39,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:39,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215131113] [2021-11-23 02:41:39,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215131113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:39,178 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:39,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-23 02:41:39,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62654573] [2021-11-23 02:41:39,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:39,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 02:41:39,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:39,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 02:41:39,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:41:39,180 INFO L87 Difference]: Start difference. First operand 26181 states and 38006 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:44,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:44,227 INFO L93 Difference]: Finished difference Result 42135 states and 61188 transitions. [2021-11-23 02:41:44,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 02:41:44,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 02:41:44,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:44,301 INFO L225 Difference]: With dead ends: 42135 [2021-11-23 02:41:44,301 INFO L226 Difference]: Without dead ends: 40149 [2021-11-23 02:41:44,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:41:44,318 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 695 mSDsluCounter, 2867 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 3189 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:44,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 3189 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:41:44,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40149 states. [2021-11-23 02:41:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40149 to 26185. [2021-11-23 02:41:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26185 states, 26184 states have (on average 1.451726245035136) internal successors, (38012), 26184 states have internal predecessors, (38012), 0 states have call successors, (0), 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 02:41:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26185 states to 26185 states and 38012 transitions. [2021-11-23 02:41:46,951 INFO L78 Accepts]: Start accepts. Automaton has 26185 states and 38012 transitions. Word has length 71 [2021-11-23 02:41:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:46,952 INFO L470 AbstractCegarLoop]: Abstraction has 26185 states and 38012 transitions. [2021-11-23 02:41:46,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:41:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 26185 states and 38012 transitions. [2021-11-23 02:41:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 02:41:46,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:46,954 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] [2021-11-23 02:41:46,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:41:46,955 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:46,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:46,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1967659435, now seen corresponding path program 1 times [2021-11-23 02:41:46,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:46,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438284982] [2021-11-23 02:41:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:46,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:46,990 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 02:41:46,990 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:46,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438284982] [2021-11-23 02:41:46,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438284982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:46,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:46,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:41:46,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3789037] [2021-11-23 02:41:46,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:46,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:46,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:46,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:46,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:46,992 INFO L87 Difference]: Start difference. First operand 26185 states and 38012 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 02:41:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:49,450 INFO L93 Difference]: Finished difference Result 44953 states and 65362 transitions. [2021-11-23 02:41:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:49,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-23 02:41:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:49,483 INFO L225 Difference]: With dead ends: 44953 [2021-11-23 02:41:49,483 INFO L226 Difference]: Without dead ends: 20099 [2021-11-23 02:41:49,512 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 02:41:49,513 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 138 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:49,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 366 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:41:49,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20099 states. [2021-11-23 02:41:51,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20099 to 19823. [2021-11-23 02:41:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19823 states, 19822 states have (on average 1.446725860155383) internal successors, (28677), 19822 states have internal predecessors, (28677), 0 states have call successors, (0), 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 02:41:51,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19823 states to 19823 states and 28677 transitions. [2021-11-23 02:41:51,357 INFO L78 Accepts]: Start accepts. Automaton has 19823 states and 28677 transitions. Word has length 72 [2021-11-23 02:41:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:51,358 INFO L470 AbstractCegarLoop]: Abstraction has 19823 states and 28677 transitions. [2021-11-23 02:41:51,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 02:41:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 19823 states and 28677 transitions. [2021-11-23 02:41:51,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 02:41:51,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:51,360 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] [2021-11-23 02:41:51,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:41:51,361 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:51,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1683717221, now seen corresponding path program 1 times [2021-11-23 02:41:51,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:51,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037797893] [2021-11-23 02:41:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:51,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:51,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:51,398 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 02:41:51,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:51,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037797893] [2021-11-23 02:41:51,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037797893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:51,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:51,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:41:51,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839804108] [2021-11-23 02:41:51,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:51,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:51,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:51,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:51,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:51,401 INFO L87 Difference]: Start difference. First operand 19823 states and 28677 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 02:41:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:53,326 INFO L93 Difference]: Finished difference Result 34234 states and 49704 transitions. [2021-11-23 02:41:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:53,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-23 02:41:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:53,357 INFO L225 Difference]: With dead ends: 34234 [2021-11-23 02:41:53,358 INFO L226 Difference]: Without dead ends: 19217 [2021-11-23 02:41:53,377 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 02:41:53,378 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 139 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:53,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 364 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:41:53,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19217 states. [2021-11-23 02:41:55,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19217 to 19215. [2021-11-23 02:41:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19215 states, 19214 states have (on average 1.4453003018632247) internal successors, (27770), 19214 states have internal predecessors, (27770), 0 states have call successors, (0), 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 02:41:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19215 states to 19215 states and 27770 transitions. [2021-11-23 02:41:55,175 INFO L78 Accepts]: Start accepts. Automaton has 19215 states and 27770 transitions. Word has length 72 [2021-11-23 02:41:55,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:55,175 INFO L470 AbstractCegarLoop]: Abstraction has 19215 states and 27770 transitions. [2021-11-23 02:41:55,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 02:41:55,176 INFO L276 IsEmpty]: Start isEmpty. Operand 19215 states and 27770 transitions. [2021-11-23 02:41:55,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 02:41:55,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:55,178 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] [2021-11-23 02:41:55,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 02:41:55,178 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:55,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1176192105, now seen corresponding path program 1 times [2021-11-23 02:41:55,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:55,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812175020] [2021-11-23 02:41:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:55,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:55,211 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 02:41:55,211 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:55,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812175020] [2021-11-23 02:41:55,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812175020] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:55,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:55,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:41:55,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495540673] [2021-11-23 02:41:55,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:55,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:55,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:55,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:55,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:55,214 INFO L87 Difference]: Start difference. First operand 19215 states and 27770 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 02:41:57,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:41:57,224 INFO L93 Difference]: Finished difference Result 33218 states and 48135 transitions. [2021-11-23 02:41:57,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:41:57,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-23 02:41:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:41:57,257 INFO L225 Difference]: With dead ends: 33218 [2021-11-23 02:41:57,257 INFO L226 Difference]: Without dead ends: 18520 [2021-11-23 02:41:57,275 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 02:41:57,275 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 143 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:41:57,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 352 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:41:57,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18520 states. [2021-11-23 02:41:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18520 to 18518. [2021-11-23 02:41:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18518 states, 18517 states have (on average 1.4434843657179888) internal successors, (26729), 18517 states have internal predecessors, (26729), 0 states have call successors, (0), 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 02:41:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18518 states to 18518 states and 26729 transitions. [2021-11-23 02:41:59,073 INFO L78 Accepts]: Start accepts. Automaton has 18518 states and 26729 transitions. Word has length 72 [2021-11-23 02:41:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:41:59,073 INFO L470 AbstractCegarLoop]: Abstraction has 18518 states and 26729 transitions. [2021-11-23 02:41:59,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 02:41:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 18518 states and 26729 transitions. [2021-11-23 02:41:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-23 02:41:59,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:41:59,075 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] [2021-11-23 02:41:59,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 02:41:59,075 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:41:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:41:59,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2060278430, now seen corresponding path program 1 times [2021-11-23 02:41:59,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:41:59,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432944293] [2021-11-23 02:41:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:41:59,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:41:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:41:59,109 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 02:41:59,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:41:59,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432944293] [2021-11-23 02:41:59,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432944293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:41:59,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:41:59,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:41:59,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882157258] [2021-11-23 02:41:59,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:41:59,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:41:59,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:41:59,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:41:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:41:59,112 INFO L87 Difference]: Start difference. First operand 18518 states and 26729 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 02:42:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:01,148 INFO L93 Difference]: Finished difference Result 33538 states and 48564 transitions. [2021-11-23 02:42:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:42:01,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-23 02:42:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:01,172 INFO L225 Difference]: With dead ends: 33538 [2021-11-23 02:42:01,172 INFO L226 Difference]: Without dead ends: 17865 [2021-11-23 02:42:01,188 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 02:42:01,188 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 134 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:01,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 352 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:42:01,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17865 states. [2021-11-23 02:42:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17865 to 17863. [2021-11-23 02:42:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 1.4422237151494794) internal successors, (25761), 17862 states have internal predecessors, (25761), 0 states have call successors, (0), 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 02:42:02,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 25761 transitions. [2021-11-23 02:42:02,859 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 25761 transitions. Word has length 72 [2021-11-23 02:42:02,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:02,859 INFO L470 AbstractCegarLoop]: Abstraction has 17863 states and 25761 transitions. [2021-11-23 02:42:02,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 02:42:02,859 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 25761 transitions. [2021-11-23 02:42:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:42:02,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:02,861 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] [2021-11-23 02:42:02,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 02:42:02,862 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:02,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:02,862 INFO L85 PathProgramCache]: Analyzing trace with hash 976251533, now seen corresponding path program 1 times [2021-11-23 02:42:02,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:02,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528722595] [2021-11-23 02:42:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:02,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:04,841 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 02:42:04,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:04,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528722595] [2021-11-23 02:42:04,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528722595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:04,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:04,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-23 02:42:04,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641226198] [2021-11-23 02:42:04,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:04,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 02:42:04,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 02:42:04,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:42:04,843 INFO L87 Difference]: Start difference. First operand 17863 states and 25761 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:42:10,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:10,550 INFO L93 Difference]: Finished difference Result 22568 states and 32450 transitions. [2021-11-23 02:42:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 02:42:10,551 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-23 02:42:10,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:10,587 INFO L225 Difference]: With dead ends: 22568 [2021-11-23 02:42:10,587 INFO L226 Difference]: Without dead ends: 22566 [2021-11-23 02:42:10,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=388, Invalid=1682, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 02:42:10,596 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 1192 mSDsluCounter, 3755 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 4038 SdHoareTripleChecker+Invalid, 2322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:10,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1192 Valid, 4038 Invalid, 2322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2291 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 02:42:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22566 states. [2021-11-23 02:42:12,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22566 to 17869. [2021-11-23 02:42:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17869 states, 17868 states have (on average 1.442131184239982) internal successors, (25768), 17868 states have internal predecessors, (25768), 0 states have call successors, (0), 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 02:42:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17869 states to 17869 states and 25768 transitions. [2021-11-23 02:42:12,593 INFO L78 Accepts]: Start accepts. Automaton has 17869 states and 25768 transitions. Word has length 73 [2021-11-23 02:42:12,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:12,593 INFO L470 AbstractCegarLoop]: Abstraction has 17869 states and 25768 transitions. [2021-11-23 02:42:12,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:42:12,594 INFO L276 IsEmpty]: Start isEmpty. Operand 17869 states and 25768 transitions. [2021-11-23 02:42:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:42:12,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:12,595 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] [2021-11-23 02:42:12,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 02:42:12,596 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:12,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:12,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1876133613, now seen corresponding path program 1 times [2021-11-23 02:42:12,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:12,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550231498] [2021-11-23 02:42:12,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:12,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:14,262 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 02:42:14,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:14,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550231498] [2021-11-23 02:42:14,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550231498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:14,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:14,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-23 02:42:14,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331378957] [2021-11-23 02:42:14,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:14,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 02:42:14,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:14,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 02:42:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:42:14,264 INFO L87 Difference]: Start difference. First operand 17869 states and 25768 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:42:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:20,858 INFO L93 Difference]: Finished difference Result 24127 states and 34780 transitions. [2021-11-23 02:42:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 02:42:20,859 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-23 02:42:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:20,893 INFO L225 Difference]: With dead ends: 24127 [2021-11-23 02:42:20,893 INFO L226 Difference]: Without dead ends: 22365 [2021-11-23 02:42:20,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=371, Invalid=1521, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 02:42:20,900 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 1244 mSDsluCounter, 4090 mSDsCounter, 0 mSdLazyCounter, 3299 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1244 SdHoareTripleChecker+Valid, 4422 SdHoareTripleChecker+Invalid, 3333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:20,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1244 Valid, 4422 Invalid, 3333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3299 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 02:42:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22365 states. [2021-11-23 02:42:22,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22365 to 18669. [2021-11-23 02:42:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18669 states, 18668 states have (on average 1.440807799442897) internal successors, (26897), 18668 states have internal predecessors, (26897), 0 states have call successors, (0), 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 02:42:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18669 states to 18669 states and 26897 transitions. [2021-11-23 02:42:22,847 INFO L78 Accepts]: Start accepts. Automaton has 18669 states and 26897 transitions. Word has length 73 [2021-11-23 02:42:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:22,847 INFO L470 AbstractCegarLoop]: Abstraction has 18669 states and 26897 transitions. [2021-11-23 02:42:22,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:42:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 18669 states and 26897 transitions. [2021-11-23 02:42:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:42:22,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:22,849 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] [2021-11-23 02:42:22,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 02:42:22,850 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:22,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:22,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1885957427, now seen corresponding path program 1 times [2021-11-23 02:42:22,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:22,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247750996] [2021-11-23 02:42:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:22,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:24,121 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 02:42:24,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:24,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247750996] [2021-11-23 02:42:24,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247750996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:24,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:24,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-23 02:42:24,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385286092] [2021-11-23 02:42:24,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:24,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 02:42:24,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:24,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 02:42:24,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-11-23 02:42:24,123 INFO L87 Difference]: Start difference. First operand 18669 states and 26897 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:42:29,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:29,624 INFO L93 Difference]: Finished difference Result 21595 states and 31052 transitions. [2021-11-23 02:42:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 02:42:29,625 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-23 02:42:29,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:29,656 INFO L225 Difference]: With dead ends: 21595 [2021-11-23 02:42:29,656 INFO L226 Difference]: Without dead ends: 21593 [2021-11-23 02:42:29,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=402, Invalid=1760, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:42:29,663 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 1316 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 3299 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 2381 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:29,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 2381 Invalid, 3331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3299 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:42:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21593 states. [2021-11-23 02:42:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21593 to 18668. [2021-11-23 02:42:31,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18668 states, 18667 states have (on average 1.4407778432527991) internal successors, (26895), 18667 states have internal predecessors, (26895), 0 states have call successors, (0), 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 02:42:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18668 states to 18668 states and 26895 transitions. [2021-11-23 02:42:31,734 INFO L78 Accepts]: Start accepts. Automaton has 18668 states and 26895 transitions. Word has length 73 [2021-11-23 02:42:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:31,735 INFO L470 AbstractCegarLoop]: Abstraction has 18668 states and 26895 transitions. [2021-11-23 02:42:31,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:42:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 18668 states and 26895 transitions. [2021-11-23 02:42:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:42:31,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:31,737 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] [2021-11-23 02:42:31,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 02:42:31,737 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:31,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:31,738 INFO L85 PathProgramCache]: Analyzing trace with hash -291184979, now seen corresponding path program 1 times [2021-11-23 02:42:31,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:31,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798099401] [2021-11-23 02:42:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:31,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:32,992 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 02:42:32,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:32,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798099401] [2021-11-23 02:42:32,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798099401] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:32,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:32,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-23 02:42:32,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227786653] [2021-11-23 02:42:32,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:32,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:42:32,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:32,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:42:32,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:42:32,994 INFO L87 Difference]: Start difference. First operand 18668 states and 26895 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:42:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:38,396 INFO L93 Difference]: Finished difference Result 23373 states and 33584 transitions. [2021-11-23 02:42:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 02:42:38,397 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-23 02:42:38,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:38,437 INFO L225 Difference]: With dead ends: 23373 [2021-11-23 02:42:38,437 INFO L226 Difference]: Without dead ends: 23371 [2021-11-23 02:42:38,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 02:42:38,447 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 984 mSDsluCounter, 2054 mSDsCounter, 0 mSdLazyCounter, 2901 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 2242 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:38,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [984 Valid, 2242 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2901 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:42:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23371 states. [2021-11-23 02:42:40,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23371 to 18668. [2021-11-23 02:42:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18668 states, 18667 states have (on average 1.4407778432527991) internal successors, (26895), 18667 states have internal predecessors, (26895), 0 states have call successors, (0), 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 02:42:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18668 states to 18668 states and 26895 transitions. [2021-11-23 02:42:40,732 INFO L78 Accepts]: Start accepts. Automaton has 18668 states and 26895 transitions. Word has length 73 [2021-11-23 02:42:40,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:40,732 INFO L470 AbstractCegarLoop]: Abstraction has 18668 states and 26895 transitions. [2021-11-23 02:42:40,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:42:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 18668 states and 26895 transitions. [2021-11-23 02:42:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:42:40,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:40,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:42:40,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 02:42:40,735 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:40,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1684585715, now seen corresponding path program 1 times [2021-11-23 02:42:40,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:40,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321101106] [2021-11-23 02:42:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:40,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:41,577 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 02:42:41,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:41,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321101106] [2021-11-23 02:42:41,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321101106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:41,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:41,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-23 02:42:41,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739455478] [2021-11-23 02:42:41,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:41,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 02:42:41,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:41,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 02:42:41,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:42:41,580 INFO L87 Difference]: Start difference. First operand 18668 states and 26895 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:42:45,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:45,001 INFO L93 Difference]: Finished difference Result 24948 states and 35922 transitions. [2021-11-23 02:42:45,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:42:45,002 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-23 02:42:45,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:45,036 INFO L225 Difference]: With dead ends: 24948 [2021-11-23 02:42:45,036 INFO L226 Difference]: Without dead ends: 23154 [2021-11-23 02:42:45,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-11-23 02:42:45,047 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 839 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1507 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:45,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 1507 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:42:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23154 states. [2021-11-23 02:42:47,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23154 to 18668. [2021-11-23 02:42:47,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18668 states, 18667 states have (on average 1.4407778432527991) internal successors, (26895), 18667 states have internal predecessors, (26895), 0 states have call successors, (0), 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 02:42:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18668 states to 18668 states and 26895 transitions. [2021-11-23 02:42:47,110 INFO L78 Accepts]: Start accepts. Automaton has 18668 states and 26895 transitions. Word has length 73 [2021-11-23 02:42:47,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:47,110 INFO L470 AbstractCegarLoop]: Abstraction has 18668 states and 26895 transitions. [2021-11-23 02:42:47,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:42:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 18668 states and 26895 transitions. [2021-11-23 02:42:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:42:47,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:47,112 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] [2021-11-23 02:42:47,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-23 02:42:47,112 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:47,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:47,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1151709459, now seen corresponding path program 1 times [2021-11-23 02:42:47,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:47,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530718502] [2021-11-23 02:42:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:47,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:42:47,901 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:47,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530718502] [2021-11-23 02:42:47,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530718502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:47,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:47,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-23 02:42:47,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077697572] [2021-11-23 02:42:47,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:47,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 02:42:47,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:47,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 02:42:47,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:42:47,903 INFO L87 Difference]: Start difference. First operand 18668 states and 26895 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:42:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:42:52,664 INFO L93 Difference]: Finished difference Result 23352 states and 33564 transitions. [2021-11-23 02:42:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 02:42:52,664 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-23 02:42:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:42:52,697 INFO L225 Difference]: With dead ends: 23352 [2021-11-23 02:42:52,697 INFO L226 Difference]: Without dead ends: 23350 [2021-11-23 02:42:52,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 02:42:52,706 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 1163 mSDsluCounter, 1603 mSDsCounter, 0 mSdLazyCounter, 2152 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:42:52,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 1816 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2152 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 02:42:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23350 states. [2021-11-23 02:42:55,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23350 to 18671. [2021-11-23 02:42:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18671 states, 18670 states have (on average 1.4407605784681308) internal successors, (26899), 18670 states have internal predecessors, (26899), 0 states have call successors, (0), 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 02:42:55,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18671 states to 18671 states and 26899 transitions. [2021-11-23 02:42:55,081 INFO L78 Accepts]: Start accepts. Automaton has 18671 states and 26899 transitions. Word has length 73 [2021-11-23 02:42:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:42:55,081 INFO L470 AbstractCegarLoop]: Abstraction has 18671 states and 26899 transitions. [2021-11-23 02:42:55,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:42:55,081 INFO L276 IsEmpty]: Start isEmpty. Operand 18671 states and 26899 transitions. [2021-11-23 02:42:55,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:42:55,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:42:55,083 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] [2021-11-23 02:42:55,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-23 02:42:55,083 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:42:55,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:42:55,084 INFO L85 PathProgramCache]: Analyzing trace with hash 443062989, now seen corresponding path program 1 times [2021-11-23 02:42:55,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:42:55,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695559187] [2021-11-23 02:42:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:42:55,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:42:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:42:56,647 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 02:42:56,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:42:56,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695559187] [2021-11-23 02:42:56,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695559187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:42:56,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:42:56,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-23 02:42:56,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928491270] [2021-11-23 02:42:56,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:42:56,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:42:56,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:42:56,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:42:56,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:42:56,649 INFO L87 Difference]: Start difference. First operand 18671 states and 26899 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:43:03,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:03,094 INFO L93 Difference]: Finished difference Result 21568 states and 31025 transitions. [2021-11-23 02:43:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 02:43:03,094 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-23 02:43:03,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:03,122 INFO L225 Difference]: With dead ends: 21568 [2021-11-23 02:43:03,122 INFO L226 Difference]: Without dead ends: 21566 [2021-11-23 02:43:03,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=349, Invalid=1457, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 02:43:03,128 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 1034 mSDsluCounter, 1926 mSDsCounter, 0 mSdLazyCounter, 3155 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:03,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 2129 Invalid, 3174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3155 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 02:43:03,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21566 states. [2021-11-23 02:43:05,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21566 to 18671. [2021-11-23 02:43:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18671 states, 18670 states have (on average 1.4407605784681308) internal successors, (26899), 18670 states have internal predecessors, (26899), 0 states have call successors, (0), 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 02:43:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18671 states to 18671 states and 26899 transitions. [2021-11-23 02:43:05,283 INFO L78 Accepts]: Start accepts. Automaton has 18671 states and 26899 transitions. Word has length 73 [2021-11-23 02:43:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:05,283 INFO L470 AbstractCegarLoop]: Abstraction has 18671 states and 26899 transitions. [2021-11-23 02:43:05,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:43:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 18671 states and 26899 transitions. [2021-11-23 02:43:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:43:05,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:05,285 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] [2021-11-23 02:43:05,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-23 02:43:05,285 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:05,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:05,286 INFO L85 PathProgramCache]: Analyzing trace with hash -118850739, now seen corresponding path program 1 times [2021-11-23 02:43:05,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:05,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682920944] [2021-11-23 02:43:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:05,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:07,236 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 02:43:07,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:07,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682920944] [2021-11-23 02:43:07,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682920944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:07,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:07,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-23 02:43:07,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801288903] [2021-11-23 02:43:07,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:07,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 02:43:07,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:07,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 02:43:07,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-11-23 02:43:07,240 INFO L87 Difference]: Start difference. First operand 18671 states and 26899 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:43:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:14,801 INFO L93 Difference]: Finished difference Result 28650 states and 41338 transitions. [2021-11-23 02:43:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 02:43:14,801 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-23 02:43:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:14,847 INFO L225 Difference]: With dead ends: 28650 [2021-11-23 02:43:14,847 INFO L226 Difference]: Without dead ends: 25288 [2021-11-23 02:43:14,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=496, Invalid=1954, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 02:43:14,859 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 1113 mSDsluCounter, 3536 mSDsCounter, 0 mSdLazyCounter, 2171 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 3821 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:14,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 3821 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2171 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 02:43:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25288 states. [2021-11-23 02:43:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25288 to 18655. [2021-11-23 02:43:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18655 states, 18654 states have (on average 1.4410850219792002) internal successors, (26882), 18654 states have internal predecessors, (26882), 0 states have call successors, (0), 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 02:43:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18655 states to 18655 states and 26882 transitions. [2021-11-23 02:43:17,429 INFO L78 Accepts]: Start accepts. Automaton has 18655 states and 26882 transitions. Word has length 73 [2021-11-23 02:43:17,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:17,429 INFO L470 AbstractCegarLoop]: Abstraction has 18655 states and 26882 transitions. [2021-11-23 02:43:17,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:43:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 18655 states and 26882 transitions. [2021-11-23 02:43:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 02:43:17,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:17,431 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] [2021-11-23 02:43:17,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-23 02:43:17,431 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:17,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:17,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1264760051, now seen corresponding path program 1 times [2021-11-23 02:43:17,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:17,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390737922] [2021-11-23 02:43:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:17,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:19,636 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 02:43:19,636 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:19,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390737922] [2021-11-23 02:43:19,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390737922] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:19,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:19,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-11-23 02:43:19,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878673640] [2021-11-23 02:43:19,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:19,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 02:43:19,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:19,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 02:43:19,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-11-23 02:43:19,638 INFO L87 Difference]: Start difference. First operand 18655 states and 26882 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:43:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:27,876 INFO L93 Difference]: Finished difference Result 21565 states and 31021 transitions. [2021-11-23 02:43:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 02:43:27,877 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-23 02:43:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:27,909 INFO L225 Difference]: With dead ends: 21565 [2021-11-23 02:43:27,909 INFO L226 Difference]: Without dead ends: 21563 [2021-11-23 02:43:27,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=412, Invalid=1568, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 02:43:27,917 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 896 mSDsluCounter, 3096 mSDsCounter, 0 mSdLazyCounter, 4023 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 4041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 4023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:27,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 3423 Invalid, 4041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 4023 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 02:43:27,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21563 states. [2021-11-23 02:43:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21563 to 18654. [2021-11-23 02:43:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18654 states, 18653 states have (on average 1.441055058167587) internal successors, (26880), 18653 states have internal predecessors, (26880), 0 states have call successors, (0), 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 02:43:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18654 states to 18654 states and 26880 transitions. [2021-11-23 02:43:30,579 INFO L78 Accepts]: Start accepts. Automaton has 18654 states and 26880 transitions. Word has length 73 [2021-11-23 02:43:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:30,580 INFO L470 AbstractCegarLoop]: Abstraction has 18654 states and 26880 transitions. [2021-11-23 02:43:30,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 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 02:43:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 18654 states and 26880 transitions. [2021-11-23 02:43:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 02:43:30,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:30,582 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:43:30,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-23 02:43:30,582 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:30,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:30,583 INFO L85 PathProgramCache]: Analyzing trace with hash 192158284, now seen corresponding path program 1 times [2021-11-23 02:43:30,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:30,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439441010] [2021-11-23 02:43:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:30,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:30,617 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 02:43:30,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:30,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439441010] [2021-11-23 02:43:30,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439441010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:30,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:30,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:43:30,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035162263] [2021-11-23 02:43:30,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:30,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:43:30,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:30,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:43:30,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:43:30,620 INFO L87 Difference]: Start difference. First operand 18654 states and 26880 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:33,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:33,028 INFO L93 Difference]: Finished difference Result 35288 states and 51041 transitions. [2021-11-23 02:43:33,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:43:33,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-23 02:43:33,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:33,062 INFO L225 Difference]: With dead ends: 35288 [2021-11-23 02:43:33,062 INFO L226 Difference]: Without dead ends: 18056 [2021-11-23 02:43:33,082 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 02:43:33,083 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 124 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:33,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 356 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:43:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18056 states. [2021-11-23 02:43:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18056 to 18054. [2021-11-23 02:43:35,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18054 states, 18053 states have (on average 1.4392621724921066) internal successors, (25983), 18053 states have internal predecessors, (25983), 0 states have call successors, (0), 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 02:43:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18054 states to 18054 states and 25983 transitions. [2021-11-23 02:43:35,446 INFO L78 Accepts]: Start accepts. Automaton has 18054 states and 25983 transitions. Word has length 74 [2021-11-23 02:43:35,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:35,446 INFO L470 AbstractCegarLoop]: Abstraction has 18054 states and 25983 transitions. [2021-11-23 02:43:35,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:43:35,447 INFO L276 IsEmpty]: Start isEmpty. Operand 18054 states and 25983 transitions. [2021-11-23 02:43:35,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 02:43:35,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:35,448 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] [2021-11-23 02:43:35,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-23 02:43:35,449 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:35,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:35,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1044845345, now seen corresponding path program 1 times [2021-11-23 02:43:35,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:35,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767507202] [2021-11-23 02:43:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:35,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:43:39,532 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 02:43:39,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:43:39,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767507202] [2021-11-23 02:43:39,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767507202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:43:39,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:43:39,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-23 02:43:39,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367669710] [2021-11-23 02:43:39,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:43:39,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 02:43:39,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:43:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 02:43:39,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:43:39,534 INFO L87 Difference]: Start difference. First operand 18054 states and 25983 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 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 02:43:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:43:51,778 INFO L93 Difference]: Finished difference Result 20874 states and 29975 transitions. [2021-11-23 02:43:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 02:43:51,778 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-23 02:43:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:43:51,813 INFO L225 Difference]: With dead ends: 20874 [2021-11-23 02:43:51,814 INFO L226 Difference]: Without dead ends: 20872 [2021-11-23 02:43:51,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=608, Invalid=2472, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:43:51,822 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 1090 mSDsluCounter, 3091 mSDsCounter, 0 mSdLazyCounter, 5471 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 3399 SdHoareTripleChecker+Invalid, 5498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 5471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:43:51,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1090 Valid, 3399 Invalid, 5498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 5471 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-11-23 02:43:51,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20872 states. [2021-11-23 02:43:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20872 to 18054. [2021-11-23 02:43:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18054 states, 18053 states have (on average 1.4392621724921066) internal successors, (25983), 18053 states have internal predecessors, (25983), 0 states have call successors, (0), 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 02:43:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18054 states to 18054 states and 25983 transitions. [2021-11-23 02:43:54,353 INFO L78 Accepts]: Start accepts. Automaton has 18054 states and 25983 transitions. Word has length 75 [2021-11-23 02:43:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:43:54,353 INFO L470 AbstractCegarLoop]: Abstraction has 18054 states and 25983 transitions. [2021-11-23 02:43:54,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 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 02:43:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 18054 states and 25983 transitions. [2021-11-23 02:43:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 02:43:54,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:43:54,356 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] [2021-11-23 02:43:54,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-23 02:43:54,357 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:43:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:43:54,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2012461247, now seen corresponding path program 1 times [2021-11-23 02:43:54,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:43:54,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143328479] [2021-11-23 02:43:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:43:54,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:43:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:00,437 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 02:44:00,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:00,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143328479] [2021-11-23 02:44:00,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143328479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:00,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:00,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-11-23 02:44:00,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467584316] [2021-11-23 02:44:00,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:00,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 02:44:00,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:00,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 02:44:00,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 02:44:00,439 INFO L87 Difference]: Start difference. First operand 18054 states and 25983 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 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 02:44:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:14,763 INFO L93 Difference]: Finished difference Result 20844 states and 29945 transitions. [2021-11-23 02:44:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 02:44:14,764 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-23 02:44:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:14,795 INFO L225 Difference]: With dead ends: 20844 [2021-11-23 02:44:14,795 INFO L226 Difference]: Without dead ends: 20842 [2021-11-23 02:44:14,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=850, Invalid=3056, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 02:44:14,802 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 1241 mSDsluCounter, 3253 mSDsCounter, 0 mSdLazyCounter, 5450 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 3565 SdHoareTripleChecker+Invalid, 5483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 5450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:14,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 3565 Invalid, 5483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 5450 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 02:44:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20842 states. [2021-11-23 02:44:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20842 to 19768. [2021-11-23 02:44:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19768 states, 19767 states have (on average 1.4376486062629634) internal successors, (28418), 19767 states have internal predecessors, (28418), 0 states have call successors, (0), 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 02:44:17,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19768 states to 19768 states and 28418 transitions. [2021-11-23 02:44:17,724 INFO L78 Accepts]: Start accepts. Automaton has 19768 states and 28418 transitions. Word has length 75 [2021-11-23 02:44:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:17,725 INFO L470 AbstractCegarLoop]: Abstraction has 19768 states and 28418 transitions. [2021-11-23 02:44:17,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 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 02:44:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 19768 states and 28418 transitions. [2021-11-23 02:44:17,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 02:44:17,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:17,727 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] [2021-11-23 02:44:17,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-23 02:44:17,727 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:17,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:17,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1112579167, now seen corresponding path program 1 times [2021-11-23 02:44:17,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:17,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110431420] [2021-11-23 02:44:17,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:17,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:21,709 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 02:44:21,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:21,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110431420] [2021-11-23 02:44:21,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110431420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:21,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:21,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-23 02:44:21,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556696644] [2021-11-23 02:44:21,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:21,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 02:44:21,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:21,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 02:44:21,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:44:21,712 INFO L87 Difference]: Start difference. First operand 19768 states and 28418 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 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 02:44:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:33,799 INFO L93 Difference]: Finished difference Result 23096 states and 33194 transitions. [2021-11-23 02:44:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 02:44:33,800 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-23 02:44:33,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:33,939 INFO L225 Difference]: With dead ends: 23096 [2021-11-23 02:44:33,940 INFO L226 Difference]: Without dead ends: 21398 [2021-11-23 02:44:33,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=643, Invalid=2437, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:44:33,945 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 986 mSDsluCounter, 3179 mSDsCounter, 0 mSdLazyCounter, 4253 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 3511 SdHoareTripleChecker+Invalid, 4286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 4253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:33,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [986 Valid, 3511 Invalid, 4286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 4253 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-23 02:44:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21398 states. [2021-11-23 02:44:36,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21398 to 19758. [2021-11-23 02:44:36,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19758 states, 19757 states have (on average 1.4378701219820822) internal successors, (28408), 19757 states have internal predecessors, (28408), 0 states have call successors, (0), 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 02:44:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19758 states to 19758 states and 28408 transitions. [2021-11-23 02:44:36,699 INFO L78 Accepts]: Start accepts. Automaton has 19758 states and 28408 transitions. Word has length 75 [2021-11-23 02:44:36,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:36,699 INFO L470 AbstractCegarLoop]: Abstraction has 19758 states and 28408 transitions. [2021-11-23 02:44:36,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 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 02:44:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 19758 states and 28408 transitions. [2021-11-23 02:44:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 02:44:36,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:36,701 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] [2021-11-23 02:44:36,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-23 02:44:36,702 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:36,702 INFO L85 PathProgramCache]: Analyzing trace with hash -579702911, now seen corresponding path program 1 times [2021-11-23 02:44:36,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:36,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137686523] [2021-11-23 02:44:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:36,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:44:41,500 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 02:44:41,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:44:41,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137686523] [2021-11-23 02:44:41,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137686523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:44:41,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:44:41,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-11-23 02:44:41,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142514129] [2021-11-23 02:44:41,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:44:41,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 02:44:41,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:44:41,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 02:44:41,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:44:41,503 INFO L87 Difference]: Start difference. First operand 19758 states and 28408 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 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 02:44:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:44:54,444 INFO L93 Difference]: Finished difference Result 22539 states and 32358 transitions. [2021-11-23 02:44:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 02:44:54,445 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-23 02:44:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:44:54,482 INFO L225 Difference]: With dead ends: 22539 [2021-11-23 02:44:54,482 INFO L226 Difference]: Without dead ends: 22537 [2021-11-23 02:44:54,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=639, Invalid=2331, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 02:44:54,492 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 1065 mSDsluCounter, 3167 mSDsCounter, 0 mSdLazyCounter, 4504 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 3494 SdHoareTripleChecker+Invalid, 4540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:44:54,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1065 Valid, 3494 Invalid, 4540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4504 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-23 02:44:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22537 states. [2021-11-23 02:44:57,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22537 to 19754. [2021-11-23 02:44:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19754 states, 19753 states have (on average 1.4379081658482256) internal successors, (28403), 19753 states have internal predecessors, (28403), 0 states have call successors, (0), 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 02:44:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19754 states to 19754 states and 28403 transitions. [2021-11-23 02:44:57,592 INFO L78 Accepts]: Start accepts. Automaton has 19754 states and 28403 transitions. Word has length 75 [2021-11-23 02:44:57,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:44:57,592 INFO L470 AbstractCegarLoop]: Abstraction has 19754 states and 28403 transitions. [2021-11-23 02:44:57,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 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 02:44:57,593 INFO L276 IsEmpty]: Start isEmpty. Operand 19754 states and 28403 transitions. [2021-11-23 02:44:57,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 02:44:57,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:44:57,595 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] [2021-11-23 02:44:57,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-23 02:44:57,595 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:44:57,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:44:57,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1015069537, now seen corresponding path program 1 times [2021-11-23 02:44:57,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:44:57,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65043091] [2021-11-23 02:44:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:44:57,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:44:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:01,984 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 02:45:01,984 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:01,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65043091] [2021-11-23 02:45:01,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65043091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:01,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:01,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-23 02:45:01,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149811416] [2021-11-23 02:45:01,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:01,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 02:45:01,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:01,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 02:45:01,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:45:01,986 INFO L87 Difference]: Start difference. First operand 19754 states and 28403 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 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 02:45:15,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:15,787 INFO L93 Difference]: Finished difference Result 24379 states and 34985 transitions. [2021-11-23 02:45:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 02:45:15,788 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-11-23 02:45:15,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:15,834 INFO L225 Difference]: With dead ends: 24379 [2021-11-23 02:45:15,834 INFO L226 Difference]: Without dead ends: 24377 [2021-11-23 02:45:15,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=612, Invalid=2580, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 02:45:15,845 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 1205 mSDsluCounter, 3005 mSDsCounter, 0 mSdLazyCounter, 4934 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 4961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 4934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:15,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1205 Valid, 3259 Invalid, 4961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 4934 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-23 02:45:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24377 states. [2021-11-23 02:45:18,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24377 to 19744. [2021-11-23 02:45:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19744 states, 19743 states have (on average 1.438028668388796) internal successors, (28391), 19743 states have internal predecessors, (28391), 0 states have call successors, (0), 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 02:45:18,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19744 states to 19744 states and 28391 transitions. [2021-11-23 02:45:18,981 INFO L78 Accepts]: Start accepts. Automaton has 19744 states and 28391 transitions. Word has length 75 [2021-11-23 02:45:18,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:18,981 INFO L470 AbstractCegarLoop]: Abstraction has 19744 states and 28391 transitions. [2021-11-23 02:45:18,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 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 02:45:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 19744 states and 28391 transitions. [2021-11-23 02:45:18,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 02:45:18,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:18,983 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:18,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-23 02:45:18,984 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:18,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:18,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2069982507, now seen corresponding path program 1 times [2021-11-23 02:45:18,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:18,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725000982] [2021-11-23 02:45:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:18,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:30,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:30,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725000982] [2021-11-23 02:45:30,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725000982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:30,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:30,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-11-23 02:45:30,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677910289] [2021-11-23 02:45:30,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:30,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 02:45:30,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:30,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 02:45:30,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1679, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 02:45:30,378 INFO L87 Difference]: Start difference. First operand 19744 states and 28391 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:45:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:57,682 INFO L93 Difference]: Finished difference Result 22542 states and 32362 transitions. [2021-11-23 02:45:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-23 02:45:57,689 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 02:45:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:57,725 INFO L225 Difference]: With dead ends: 22542 [2021-11-23 02:45:57,725 INFO L226 Difference]: Without dead ends: 22540 [2021-11-23 02:45:57,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=1228, Invalid=4322, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 02:45:57,733 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 1316 mSDsluCounter, 6359 mSDsCounter, 0 mSdLazyCounter, 4985 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 6706 SdHoareTripleChecker+Invalid, 5009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 4985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:57,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 6706 Invalid, 5009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 4985 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-11-23 02:45:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22540 states. [2021-11-23 02:46:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22540 to 19714. [2021-11-23 02:46:00,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19714 states, 19713 states have (on average 1.4385430933901486) internal successors, (28358), 19713 states have internal predecessors, (28358), 0 states have call successors, (0), 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 02:46:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19714 states to 19714 states and 28358 transitions. [2021-11-23 02:46:01,021 INFO L78 Accepts]: Start accepts. Automaton has 19714 states and 28358 transitions. Word has length 77 [2021-11-23 02:46:01,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:01,022 INFO L470 AbstractCegarLoop]: Abstraction has 19714 states and 28358 transitions. [2021-11-23 02:46:01,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 19714 states and 28358 transitions. [2021-11-23 02:46:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 02:46:01,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:01,025 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:46:01,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-23 02:46:01,025 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:01,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:01,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1315945786, now seen corresponding path program 1 times [2021-11-23 02:46:01,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:01,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983721372] [2021-11-23 02:46:01,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:01,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:01,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:01,082 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:01,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983721372] [2021-11-23 02:46:01,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983721372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:01,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:01,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:01,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179767781] [2021-11-23 02:46:01,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:01,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:01,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:01,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:01,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:01,084 INFO L87 Difference]: Start difference. First operand 19714 states and 28358 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:04,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:04,620 INFO L93 Difference]: Finished difference Result 30413 states and 44139 transitions. [2021-11-23 02:46:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:04,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-23 02:46:04,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:04,661 INFO L225 Difference]: With dead ends: 30413 [2021-11-23 02:46:04,661 INFO L226 Difference]: Without dead ends: 23803 [2021-11-23 02:46:04,674 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 02:46:04,675 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 97 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:04,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 408 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:46:04,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23803 states. [2021-11-23 02:46:08,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23803 to 22745. [2021-11-23 02:46:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22745 states, 22744 states have (on average 1.4389729159338727) internal successors, (32728), 22744 states have internal predecessors, (32728), 0 states have call successors, (0), 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 02:46:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22745 states to 22745 states and 32728 transitions. [2021-11-23 02:46:08,150 INFO L78 Accepts]: Start accepts. Automaton has 22745 states and 32728 transitions. Word has length 80 [2021-11-23 02:46:08,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:08,150 INFO L470 AbstractCegarLoop]: Abstraction has 22745 states and 32728 transitions. [2021-11-23 02:46:08,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:08,150 INFO L276 IsEmpty]: Start isEmpty. Operand 22745 states and 32728 transitions. [2021-11-23 02:46:08,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 02:46:08,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:08,153 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:46:08,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-23 02:46:08,154 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:08,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1912914459, now seen corresponding path program 1 times [2021-11-23 02:46:08,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:08,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656036691] [2021-11-23 02:46:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:08,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:08,213 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:08,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656036691] [2021-11-23 02:46:08,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656036691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:08,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:08,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:08,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431940006] [2021-11-23 02:46:08,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:08,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:08,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:08,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:08,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:08,215 INFO L87 Difference]: Start difference. First operand 22745 states and 32728 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:12,540 INFO L93 Difference]: Finished difference Result 37925 states and 55062 transitions. [2021-11-23 02:46:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:12,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-23 02:46:12,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:12,598 INFO L225 Difference]: With dead ends: 37925 [2021-11-23 02:46:12,598 INFO L226 Difference]: Without dead ends: 28387 [2021-11-23 02:46:12,614 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 02:46:12,615 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 92 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:12,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 390 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:46:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28387 states. [2021-11-23 02:46:16,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28387 to 26897. [2021-11-23 02:46:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26897 states, 26896 states have (on average 1.4388756692444973) internal successors, (38700), 26896 states have internal predecessors, (38700), 0 states have call successors, (0), 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 02:46:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26897 states to 26897 states and 38700 transitions. [2021-11-23 02:46:16,843 INFO L78 Accepts]: Start accepts. Automaton has 26897 states and 38700 transitions. Word has length 83 [2021-11-23 02:46:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:16,844 INFO L470 AbstractCegarLoop]: Abstraction has 26897 states and 38700 transitions. [2021-11-23 02:46:16,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 26897 states and 38700 transitions. [2021-11-23 02:46:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-23 02:46:16,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:16,847 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:46:16,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-23 02:46:16,847 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:16,848 INFO L85 PathProgramCache]: Analyzing trace with hash -422625049, now seen corresponding path program 1 times [2021-11-23 02:46:16,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:16,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401317686] [2021-11-23 02:46:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:16,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:16,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:16,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:16,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401317686] [2021-11-23 02:46:16,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401317686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:16,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:16,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:16,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56636512] [2021-11-23 02:46:16,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:16,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:16,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:16,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:16,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:16,901 INFO L87 Difference]: Start difference. First operand 26897 states and 38700 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:22,238 INFO L93 Difference]: Finished difference Result 48565 states and 70432 transitions. [2021-11-23 02:46:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:22,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-23 02:46:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:22,305 INFO L225 Difference]: With dead ends: 48565 [2021-11-23 02:46:22,305 INFO L226 Difference]: Without dead ends: 35131 [2021-11-23 02:46:22,327 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 02:46:22,328 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 87 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:22,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 371 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:46:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35131 states. [2021-11-23 02:46:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35131 to 32921. [2021-11-23 02:46:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32921 states, 32920 states have (on average 1.436512758201701) internal successors, (47290), 32920 states have internal predecessors, (47290), 0 states have call successors, (0), 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 02:46:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32921 states to 32921 states and 47290 transitions. [2021-11-23 02:46:27,964 INFO L78 Accepts]: Start accepts. Automaton has 32921 states and 47290 transitions. Word has length 86 [2021-11-23 02:46:27,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:27,964 INFO L470 AbstractCegarLoop]: Abstraction has 32921 states and 47290 transitions. [2021-11-23 02:46:27,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 32921 states and 47290 transitions. [2021-11-23 02:46:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 02:46:27,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:27,968 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:46:27,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-23 02:46:27,968 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:27,970 INFO L85 PathProgramCache]: Analyzing trace with hash -383437107, now seen corresponding path program 1 times [2021-11-23 02:46:27,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:27,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644560975] [2021-11-23 02:46:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:27,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:28,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:28,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644560975] [2021-11-23 02:46:28,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644560975] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:28,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:28,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:28,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232964229] [2021-11-23 02:46:28,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:28,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:28,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:28,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:28,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:28,032 INFO L87 Difference]: Start difference. First operand 32921 states and 47290 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:35,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:35,418 INFO L93 Difference]: Finished difference Result 68019 states and 98224 transitions. [2021-11-23 02:46:35,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:46:35,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-23 02:46:35,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:35,504 INFO L225 Difference]: With dead ends: 68019 [2021-11-23 02:46:35,504 INFO L226 Difference]: Without dead ends: 46065 [2021-11-23 02:46:35,530 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 02:46:35,531 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 82 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:35,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 352 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:46:35,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46065 states. [2021-11-23 02:46:43,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46065 to 42715. [2021-11-23 02:46:43,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42715 states, 42714 states have (on average 1.4308657582993867) internal successors, (61118), 42714 states have internal predecessors, (61118), 0 states have call successors, (0), 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 02:46:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42715 states to 42715 states and 61118 transitions. [2021-11-23 02:46:43,169 INFO L78 Accepts]: Start accepts. Automaton has 42715 states and 61118 transitions. Word has length 89 [2021-11-23 02:46:43,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:43,169 INFO L470 AbstractCegarLoop]: Abstraction has 42715 states and 61118 transitions. [2021-11-23 02:46:43,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:46:43,170 INFO L276 IsEmpty]: Start isEmpty. Operand 42715 states and 61118 transitions. [2021-11-23 02:46:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 02:46:43,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:43,174 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 02:46:43,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-23 02:46:43,175 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:43,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1707759731, now seen corresponding path program 1 times [2021-11-23 02:46:43,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:46:43,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781090529] [2021-11-23 02:46:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:46:43,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:46:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:46:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:43,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:46:43,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781090529] [2021-11-23 02:46:43,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781090529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:46:43,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:46:43,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:46:43,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946615416] [2021-11-23 02:46:43,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:46:43,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:46:43,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:46:43,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:46:43,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:46:43,223 INFO L87 Difference]: Start difference. First operand 42715 states and 61118 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 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)