./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem04_label28.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem04_label28.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs --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 6461bc710c8cd4e03b81a9250af5b6e8fd4423c40b90cbb92a2a9d089d091a2d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:41:55,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:41:55,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:41:55,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:41:55,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:41:55,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:41:55,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:41:55,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:41:55,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:41:55,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:41:55,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:41:55,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:41:55,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:41:55,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:41:55,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:41:55,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:41:55,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:41:55,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:41:55,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:41:55,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:41:55,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:41:55,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:41:55,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:41:55,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:41:55,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:41:55,176 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:41:55,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:41:55,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:41:55,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:41:55,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:41:55,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:41:55,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:41:55,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:41:55,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:41:55,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:41:55,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:41:55,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:41:55,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:41:55,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:41:55,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:41:55,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:41:55,194 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:41:55,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:41:55,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:41:55,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:41:55,250 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:41:55,250 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:41:55,250 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:41:55,251 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:41:55,251 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:41:55,258 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:41:55,259 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:41:55,260 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:41:55,261 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:41:55,261 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:41:55,261 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:41:55,262 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:41:55,262 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:41:55,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:41:55,263 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:41:55,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:41:55,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:41:55,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:41:55,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:41:55,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:41:55,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:41:55,265 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:41:55,265 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:41:55,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:41:55,266 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:41:55,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:41:55,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:41:55,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:41:55,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:41:55,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:41:55,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:41:55,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:41:55,270 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:41:55,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:41:55,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:41:55,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:41:55,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:41:55,272 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_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6461bc710c8cd4e03b81a9250af5b6e8fd4423c40b90cbb92a2a9d089d091a2d [2021-11-19 13:41:55,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:41:55,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:41:55,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:41:55,704 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:41:55,705 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:41:55,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/eca-rers2012/Problem04_label28.c [2021-11-19 13:41:55,792 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/data/8efc2538a/6213010c5ffa464492d03983602c318d/FLAG4954b0473 [2021-11-19 13:41:56,917 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:41:56,918 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/sv-benchmarks/c/eca-rers2012/Problem04_label28.c [2021-11-19 13:41:56,980 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/data/8efc2538a/6213010c5ffa464492d03983602c318d/FLAG4954b0473 [2021-11-19 13:41:57,313 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/data/8efc2538a/6213010c5ffa464492d03983602c318d [2021-11-19 13:41:57,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:41:57,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:41:57,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:41:57,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:41:57,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:41:57,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:41:57" (1/1) ... [2021-11-19 13:41:57,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20f3a394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:41:57, skipping insertion in model container [2021-11-19 13:41:57,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:41:57" (1/1) ... [2021-11-19 13:41:57,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:41:57,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:41:59,110 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_9407786d-e003-4182-ab61-d5dee5d0f6ae/sv-benchmarks/c/eca-rers2012/Problem04_label28.c[183461,183474] [2021-11-19 13:41:59,128 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:41:59,139 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:42:00,042 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_9407786d-e003-4182-ab61-d5dee5d0f6ae/sv-benchmarks/c/eca-rers2012/Problem04_label28.c[183461,183474] [2021-11-19 13:42:00,047 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:42:00,084 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:42:00,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:42:00 WrapperNode [2021-11-19 13:42:00,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:42:00,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:42:00,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:42:00,087 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:42:00,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:42:00" (1/1) ... [2021-11-19 13:42:00,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:42:00" (1/1) ... [2021-11-19 13:42:00,460 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5572 [2021-11-19 13:42:00,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:42:00,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:42:00,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:42:00,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:42:00,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:42:00" (1/1) ... [2021-11-19 13:42:00,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:42:00" (1/1) ... [2021-11-19 13:42:00,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:42:00" (1/1) ... [2021-11-19 13:42:00,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:42:00" (1/1) ... [2021-11-19 13:42:00,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:42:00" (1/1) ... [2021-11-19 13:42:00,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:42:00" (1/1) ... [2021-11-19 13:42:00,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:42:00" (1/1) ... [2021-11-19 13:42:00,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:42:00,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:42:00,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:42:00,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:42:00,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:42:00" (1/1) ... [2021-11-19 13:42:00,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:42:00,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:42:00,883 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:42:00,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:42:00,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:42:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 13:42:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:42:00,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:42:01,205 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:42:01,218 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:42:06,103 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:42:06,465 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:42:06,466 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:42:06,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:42:06 BoogieIcfgContainer [2021-11-19 13:42:06,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:42:06,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:42:06,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:42:06,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:42:06,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:41:57" (1/3) ... [2021-11-19 13:42:06,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527a6728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:42:06, skipping insertion in model container [2021-11-19 13:42:06,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:42:00" (2/3) ... [2021-11-19 13:42:06,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527a6728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:42:06, skipping insertion in model container [2021-11-19 13:42:06,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:42:06" (3/3) ... [2021-11-19 13:42:06,485 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label28.c [2021-11-19 13:42:06,492 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:42:06,492 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:42:06,576 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:42:06,587 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 [2021-11-19 13:42:06,588 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:42:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand has 763 states, 761 states have (on average 1.9908015768725362) internal successors, (1515), 762 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2021-11-19 13:42:06,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:42:06,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:42:06,737 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:42:06,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:42:06,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1709835412, now seen corresponding path program 1 times [2021-11-19 13:42:06,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:42:06,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630795436] [2021-11-19 13:42:06,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:06,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:42:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:42:09,821 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:42:09,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630795436] [2021-11-19 13:42:09,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630795436] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:42:09,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:42:09,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 13:42:09,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253892752] [2021-11-19 13:42:09,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:09,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:42:09,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:42:09,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:42:09,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:42:09,884 INFO L87 Difference]: Start difference. First operand has 763 states, 761 states have (on average 1.9908015768725362) internal successors, (1515), 762 states have internal predecessors, (1515), 0 states have call successors, (0), 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 12 states, 12 states have (on average 62.916666666666664) internal successors, (755), 11 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:19,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:42:19,916 INFO L93 Difference]: Finished difference Result 2246 states and 4468 transitions. [2021-11-19 13:42:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:42:19,919 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 62.916666666666664) internal successors, (755), 11 states have internal predecessors, (755), 0 states have call successors, (0), 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 755 [2021-11-19 13:42:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:42:19,960 INFO L225 Difference]: With dead ends: 2246 [2021-11-19 13:42:19,960 INFO L226 Difference]: Without dead ends: 1480 [2021-11-19 13:42:19,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:42:19,974 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 1333 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 11379 mSolverCounterSat, 713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1333 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 12092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 713 IncrementalHoareTripleChecker+Valid, 11379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:42:19,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1333 Valid, 843 Invalid, 12092 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [713 Valid, 11379 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2021-11-19 13:42:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-11-19 13:42:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1480. [2021-11-19 13:42:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1479 states have (on average 1.511156186612576) internal successors, (2235), 1479 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 2235 transitions. [2021-11-19 13:42:20,101 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 2235 transitions. Word has length 755 [2021-11-19 13:42:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:42:20,104 INFO L470 AbstractCegarLoop]: Abstraction has 1480 states and 2235 transitions. [2021-11-19 13:42:20,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 62.916666666666664) internal successors, (755), 11 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 2235 transitions. [2021-11-19 13:42:20,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2021-11-19 13:42:20,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:42:20,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:42:20,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 13:42:20,145 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:42:20,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:42:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1979482723, now seen corresponding path program 1 times [2021-11-19 13:42:20,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:42:20,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496526234] [2021-11-19 13:42:20,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:20,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:42:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:42:21,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:42:21,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496526234] [2021-11-19 13:42:21,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496526234] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:42:21,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:42:21,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 13:42:21,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233891729] [2021-11-19 13:42:21,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:21,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:42:21,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:42:21,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:42:21,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:42:21,907 INFO L87 Difference]: Start difference. First operand 1480 states and 2235 transitions. Second operand has 13 states, 13 states have (on average 59.23076923076923) internal successors, (770), 12 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:29,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:42:29,715 INFO L93 Difference]: Finished difference Result 3684 states and 6623 transitions. [2021-11-19 13:42:29,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:42:29,716 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 59.23076923076923) internal successors, (770), 12 states have internal predecessors, (770), 0 states have call successors, (0), 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 770 [2021-11-19 13:42:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:42:29,735 INFO L225 Difference]: With dead ends: 3684 [2021-11-19 13:42:29,735 INFO L226 Difference]: Without dead ends: 2924 [2021-11-19 13:42:29,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:42:29,739 INFO L933 BasicCegarLoop]: 785 mSDtfsCounter, 3002 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7927 mSolverCounterSat, 1408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3002 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 9335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1408 IncrementalHoareTripleChecker+Valid, 7927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:42:29,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3002 Valid, 823 Invalid, 9335 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1408 Valid, 7927 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2021-11-19 13:42:29,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-11-19 13:42:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2924. [2021-11-19 13:42:29,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2923 states have (on average 1.2706123845364352) internal successors, (3714), 2923 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 3714 transitions. [2021-11-19 13:42:29,839 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 3714 transitions. Word has length 770 [2021-11-19 13:42:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:42:29,840 INFO L470 AbstractCegarLoop]: Abstraction has 2924 states and 3714 transitions. [2021-11-19 13:42:29,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 59.23076923076923) internal successors, (770), 12 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:29,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 3714 transitions. [2021-11-19 13:42:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2021-11-19 13:42:29,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:42:29,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:42:29,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 13:42:29,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:42:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:42:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1277306209, now seen corresponding path program 1 times [2021-11-19 13:42:29,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:42:29,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410417998] [2021-11-19 13:42:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:29,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:42:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:42:30,504 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:42:30,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410417998] [2021-11-19 13:42:30,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410417998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:42:30,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:42:30,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:42:30,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643540320] [2021-11-19 13:42:30,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:30,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:42:30,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:42:30,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:42:30,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:42:30,510 INFO L87 Difference]: Start difference. First operand 2924 states and 3714 transitions. Second operand has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:33,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:42:33,540 INFO L93 Difference]: Finished difference Result 5886 states and 8212 transitions. [2021-11-19 13:42:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:42:33,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 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 777 [2021-11-19 13:42:33,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:42:33,563 INFO L225 Difference]: With dead ends: 5886 [2021-11-19 13:42:33,563 INFO L226 Difference]: Without dead ends: 3682 [2021-11-19 13:42:33,567 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 [2021-11-19 13:42:33,568 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 54 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 1177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1177 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:42:33,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 979 Invalid, 3356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1177 Valid, 2179 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 13:42:33,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2021-11-19 13:42:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 3682. [2021-11-19 13:42:33,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 1.351806574300462) internal successors, (4976), 3681 states have internal predecessors, (4976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4976 transitions. [2021-11-19 13:42:33,695 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4976 transitions. Word has length 777 [2021-11-19 13:42:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:42:33,697 INFO L470 AbstractCegarLoop]: Abstraction has 3682 states and 4976 transitions. [2021-11-19 13:42:33,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4976 transitions. [2021-11-19 13:42:33,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2021-11-19 13:42:33,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:42:33,712 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:42:33,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 13:42:33,713 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:42:33,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:42:33,714 INFO L85 PathProgramCache]: Analyzing trace with hash -627223095, now seen corresponding path program 1 times [2021-11-19 13:42:33,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:42:33,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417385504] [2021-11-19 13:42:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:33,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:42:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 13:42:33,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:42:33,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417385504] [2021-11-19 13:42:33,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417385504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:42:33,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:42:33,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 13:42:33,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197670414] [2021-11-19 13:42:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:33,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:42:33,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:42:33,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:42:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:42:33,954 INFO L87 Difference]: Start difference. First operand 3682 states and 4976 transitions. Second operand has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 2 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:42:36,881 INFO L93 Difference]: Finished difference Result 8918 states and 12786 transitions. [2021-11-19 13:42:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:42:36,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 2 states have internal predecessors, (779), 0 states have call successors, (0), 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 782 [2021-11-19 13:42:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:42:36,909 INFO L225 Difference]: With dead ends: 8918 [2021-11-19 13:42:36,909 INFO L226 Difference]: Without dead ends: 5956 [2021-11-19 13:42:36,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:42:36,916 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 840 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 1086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 3266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1086 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:42:36,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 382 Invalid, 3266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1086 Valid, 2180 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 13:42:36,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5956 states. [2021-11-19 13:42:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5956 to 5956. [2021-11-19 13:42:37,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5956 states, 5955 states have (on average 1.3808564231738034) internal successors, (8223), 5955 states have internal predecessors, (8223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5956 states to 5956 states and 8223 transitions. [2021-11-19 13:42:37,063 INFO L78 Accepts]: Start accepts. Automaton has 5956 states and 8223 transitions. Word has length 782 [2021-11-19 13:42:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:42:37,064 INFO L470 AbstractCegarLoop]: Abstraction has 5956 states and 8223 transitions. [2021-11-19 13:42:37,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 2 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 5956 states and 8223 transitions. [2021-11-19 13:42:37,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2021-11-19 13:42:37,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:42:37,085 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:42:37,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 13:42:37,086 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:42:37,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:42:37,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1073106953, now seen corresponding path program 1 times [2021-11-19 13:42:37,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:42:37,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738424623] [2021-11-19 13:42:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:37,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:42:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:42:37,331 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:42:37,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738424623] [2021-11-19 13:42:37,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738424623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:42:37,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:42:37,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 13:42:37,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583544673] [2021-11-19 13:42:37,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:37,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:42:37,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:42:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:42:37,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:42:37,335 INFO L87 Difference]: Start difference. First operand 5956 states and 8223 transitions. Second operand has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 2 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:39,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:42:39,954 INFO L93 Difference]: Finished difference Result 14224 states and 20963 transitions. [2021-11-19 13:42:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:42:39,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 2 states have internal predecessors, (781), 0 states have call successors, (0), 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 801 [2021-11-19 13:42:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:42:39,988 INFO L225 Difference]: With dead ends: 14224 [2021-11-19 13:42:39,988 INFO L226 Difference]: Without dead ends: 8988 [2021-11-19 13:42:39,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:42:39,998 INFO L933 BasicCegarLoop]: 614 mSDtfsCounter, 817 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 1077 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 3072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1077 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:42:39,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 621 Invalid, 3072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1077 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 13:42:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8988 states. [2021-11-19 13:42:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8988 to 8988. [2021-11-19 13:42:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8988 states, 8987 states have (on average 1.3451652386780906) internal successors, (12089), 8987 states have internal predecessors, (12089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8988 states to 8988 states and 12089 transitions. [2021-11-19 13:42:40,233 INFO L78 Accepts]: Start accepts. Automaton has 8988 states and 12089 transitions. Word has length 801 [2021-11-19 13:42:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:42:40,234 INFO L470 AbstractCegarLoop]: Abstraction has 8988 states and 12089 transitions. [2021-11-19 13:42:40,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 2 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 8988 states and 12089 transitions. [2021-11-19 13:42:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2021-11-19 13:42:40,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:42:40,261 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:42:40,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 13:42:40,262 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:42:40,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:42:40,263 INFO L85 PathProgramCache]: Analyzing trace with hash 766023932, now seen corresponding path program 1 times [2021-11-19 13:42:40,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:42:40,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369607931] [2021-11-19 13:42:40,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:40,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:42:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 13:42:40,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:42:40,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369607931] [2021-11-19 13:42:40,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369607931] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:42:40,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:42:40,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 13:42:40,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706521346] [2021-11-19 13:42:40,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:40,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:42:40,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:42:40,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:42:40,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:42:40,637 INFO L87 Difference]: Start difference. First operand 8988 states and 12089 transitions. Second operand has 3 states, 3 states have (on average 272.0) internal successors, (816), 2 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:42:43,546 INFO L93 Difference]: Finished difference Result 23320 states and 32561 transitions. [2021-11-19 13:42:43,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:42:43,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 272.0) internal successors, (816), 2 states have internal predecessors, (816), 0 states have call successors, (0), 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 859 [2021-11-19 13:42:43,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:42:43,595 INFO L225 Difference]: With dead ends: 23320 [2021-11-19 13:42:43,595 INFO L226 Difference]: Without dead ends: 15052 [2021-11-19 13:42:43,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:42:43,604 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 727 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 3345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:42:43,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 647 Invalid, 3345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 3003 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 13:42:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15052 states. [2021-11-19 13:42:43,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15052 to 15052. [2021-11-19 13:42:43,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15052 states, 15051 states have (on average 1.365158461231812) internal successors, (20547), 15051 states have internal predecessors, (20547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15052 states to 15052 states and 20547 transitions. [2021-11-19 13:42:44,015 INFO L78 Accepts]: Start accepts. Automaton has 15052 states and 20547 transitions. Word has length 859 [2021-11-19 13:42:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:42:44,016 INFO L470 AbstractCegarLoop]: Abstraction has 15052 states and 20547 transitions. [2021-11-19 13:42:44,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.0) internal successors, (816), 2 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:44,016 INFO L276 IsEmpty]: Start isEmpty. Operand 15052 states and 20547 transitions. [2021-11-19 13:42:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 864 [2021-11-19 13:42:44,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:42:44,064 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:42:44,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 13:42:44,065 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:42:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:42:44,067 INFO L85 PathProgramCache]: Analyzing trace with hash -561750762, now seen corresponding path program 1 times [2021-11-19 13:42:44,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:42:44,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090367329] [2021-11-19 13:42:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:44,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:42:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-19 13:42:44,344 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:42:44,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090367329] [2021-11-19 13:42:44,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090367329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:42:44,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:42:44,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:42:44,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087385969] [2021-11-19 13:42:44,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:44,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:42:44,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:42:44,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:42:44,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:42:44,349 INFO L87 Difference]: Start difference. First operand 15052 states and 20547 transitions. Second operand has 4 states, 4 states have (on average 195.75) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:42:49,114 INFO L93 Difference]: Finished difference Result 35448 states and 48768 transitions. [2021-11-19 13:42:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:42:49,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 195.75) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 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 863 [2021-11-19 13:42:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:42:49,156 INFO L225 Difference]: With dead ends: 35448 [2021-11-19 13:42:49,157 INFO L226 Difference]: Without dead ends: 21116 [2021-11-19 13:42:49,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:42:49,170 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 1517 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 5930 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1517 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 6376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 5930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:42:49,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1517 Valid, 437 Invalid, 6376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 5930 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 13:42:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21116 states. [2021-11-19 13:42:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21116 to 21116. [2021-11-19 13:42:49,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21116 states, 21115 states have (on average 1.2890362301681269) internal successors, (27218), 21115 states have internal predecessors, (27218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21116 states to 21116 states and 27218 transitions. [2021-11-19 13:42:49,553 INFO L78 Accepts]: Start accepts. Automaton has 21116 states and 27218 transitions. Word has length 863 [2021-11-19 13:42:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:42:49,553 INFO L470 AbstractCegarLoop]: Abstraction has 21116 states and 27218 transitions. [2021-11-19 13:42:49,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.75) internal successors, (783), 3 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:49,554 INFO L276 IsEmpty]: Start isEmpty. Operand 21116 states and 27218 transitions. [2021-11-19 13:42:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 866 [2021-11-19 13:42:49,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:42:49,604 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:42:49,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 13:42:49,605 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:42:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:42:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2131110548, now seen corresponding path program 1 times [2021-11-19 13:42:49,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:42:49,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973453925] [2021-11-19 13:42:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:49,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:42:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 13:42:49,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:42:49,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973453925] [2021-11-19 13:42:49,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973453925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:42:49,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:42:49,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:42:49,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847850810] [2021-11-19 13:42:49,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:49,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:42:49,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:42:49,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:42:49,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:42:49,900 INFO L87 Difference]: Start difference. First operand 21116 states and 27218 transitions. Second operand has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:53,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:42:53,341 INFO L93 Difference]: Finished difference Result 58188 states and 76150 transitions. [2021-11-19 13:42:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:42:53,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 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 865 [2021-11-19 13:42:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:42:53,410 INFO L225 Difference]: With dead ends: 58188 [2021-11-19 13:42:53,410 INFO L226 Difference]: Without dead ends: 37792 [2021-11-19 13:42:53,432 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 [2021-11-19 13:42:53,434 INFO L933 BasicCegarLoop]: 662 mSDtfsCounter, 740 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2219 mSolverCounterSat, 919 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 3138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 919 IncrementalHoareTripleChecker+Valid, 2219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:42:53,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [740 Valid, 669 Invalid, 3138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [919 Valid, 2219 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-19 13:42:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37792 states. [2021-11-19 13:42:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37792 to 37792. [2021-11-19 13:42:54,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37792 states, 37791 states have (on average 1.2791405361064805) internal successors, (48340), 37791 states have internal predecessors, (48340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:54,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37792 states to 37792 states and 48340 transitions. [2021-11-19 13:42:54,077 INFO L78 Accepts]: Start accepts. Automaton has 37792 states and 48340 transitions. Word has length 865 [2021-11-19 13:42:54,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:42:54,078 INFO L470 AbstractCegarLoop]: Abstraction has 37792 states and 48340 transitions. [2021-11-19 13:42:54,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 37792 states and 48340 transitions. [2021-11-19 13:42:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2021-11-19 13:42:54,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:42:54,143 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:42:54,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 13:42:54,144 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:42:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:42:54,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2060766425, now seen corresponding path program 1 times [2021-11-19 13:42:54,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:42:54,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065848163] [2021-11-19 13:42:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:54,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:42:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 13:42:54,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:42:54,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065848163] [2021-11-19 13:42:54,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065848163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:42:54,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:42:54,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:42:54,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609673816] [2021-11-19 13:42:54,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:54,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:42:54,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:42:54,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:42:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:42:54,557 INFO L87 Difference]: Start difference. First operand 37792 states and 48340 transitions. Second operand has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:57,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:42:57,530 INFO L93 Difference]: Finished difference Result 74864 states and 95955 transitions. [2021-11-19 13:42:57,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:42:57,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 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 907 [2021-11-19 13:42:57,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:42:57,580 INFO L225 Difference]: With dead ends: 74864 [2021-11-19 13:42:57,581 INFO L226 Difference]: Without dead ends: 37792 [2021-11-19 13:42:57,608 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 [2021-11-19 13:42:57,610 INFO L933 BasicCegarLoop]: 1051 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2775 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 2775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:42:57,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 1057 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 2775 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-19 13:42:57,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37792 states. [2021-11-19 13:42:58,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37792 to 37792. [2021-11-19 13:42:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37792 states, 37791 states have (on average 1.2454817284538646) internal successors, (47068), 37791 states have internal predecessors, (47068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37792 states to 37792 states and 47068 transitions. [2021-11-19 13:42:58,448 INFO L78 Accepts]: Start accepts. Automaton has 37792 states and 47068 transitions. Word has length 907 [2021-11-19 13:42:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:42:58,449 INFO L470 AbstractCegarLoop]: Abstraction has 37792 states and 47068 transitions. [2021-11-19 13:42:58,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 298.0) internal successors, (894), 3 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:42:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 37792 states and 47068 transitions. [2021-11-19 13:42:58,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 941 [2021-11-19 13:42:58,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:42:58,505 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:42:58,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 13:42:58,505 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:42:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:42:58,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1862466023, now seen corresponding path program 1 times [2021-11-19 13:42:58,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:42:58,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484587418] [2021-11-19 13:42:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:58,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:42:58,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 238 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 13:42:58,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:42:58,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484587418] [2021-11-19 13:42:58,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484587418] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:42:58,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:42:58,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:42:58,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873475589] [2021-11-19 13:42:58,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:42:58,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:42:58,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:42:58,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:42:58,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:42:58,893 INFO L87 Difference]: Start difference. First operand 37792 states and 47068 transitions. Second operand has 3 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:02,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:02,184 INFO L93 Difference]: Finished difference Result 74864 states and 93411 transitions. [2021-11-19 13:43:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:43:02,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 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 940 [2021-11-19 13:43:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:02,225 INFO L225 Difference]: With dead ends: 74864 [2021-11-19 13:43:02,225 INFO L226 Difference]: Without dead ends: 37792 [2021-11-19 13:43:02,250 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 [2021-11-19 13:43:02,251 INFO L933 BasicCegarLoop]: 1332 mSDtfsCounter, 773 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1860 mSolverCounterSat, 1006 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1006 IncrementalHoareTripleChecker+Valid, 1860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:02,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1338 Invalid, 2866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1006 Valid, 1860 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-19 13:43:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37792 states. [2021-11-19 13:43:02,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37792 to 37792. [2021-11-19 13:43:02,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37792 states, 37791 states have (on average 1.1435526977322643) internal successors, (43216), 37791 states have internal predecessors, (43216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:02,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37792 states to 37792 states and 43216 transitions. [2021-11-19 13:43:02,868 INFO L78 Accepts]: Start accepts. Automaton has 37792 states and 43216 transitions. Word has length 940 [2021-11-19 13:43:02,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:02,868 INFO L470 AbstractCegarLoop]: Abstraction has 37792 states and 43216 transitions. [2021-11-19 13:43:02,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 304.6666666666667) internal successors, (914), 3 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 37792 states and 43216 transitions. [2021-11-19 13:43:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 947 [2021-11-19 13:43:03,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:03,077 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:03,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 13:43:03,078 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:03,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:03,081 INFO L85 PathProgramCache]: Analyzing trace with hash -195739546, now seen corresponding path program 1 times [2021-11-19 13:43:03,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:03,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373910843] [2021-11-19 13:43:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:03,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-19 13:43:03,429 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:03,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373910843] [2021-11-19 13:43:03,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373910843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:03,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:03,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 13:43:03,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913759220] [2021-11-19 13:43:03,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:03,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:43:03,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:03,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:43:03,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:43:03,434 INFO L87 Difference]: Start difference. First operand 37792 states and 43216 transitions. Second operand has 3 states, 3 states have (on average 293.3333333333333) internal successors, (880), 2 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:07,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:07,045 INFO L93 Difference]: Finished difference Result 101394 states and 117040 transitions. [2021-11-19 13:43:07,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:43:07,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 293.3333333333333) internal successors, (880), 2 states have internal predecessors, (880), 0 states have call successors, (0), 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 946 [2021-11-19 13:43:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:07,101 INFO L225 Difference]: With dead ends: 101394 [2021-11-19 13:43:07,101 INFO L226 Difference]: Without dead ends: 61290 [2021-11-19 13:43:07,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:43:07,119 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 911 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 1063 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 3011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1063 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:07,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 470 Invalid, 3011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1063 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 13:43:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61290 states. [2021-11-19 13:43:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61290 to 51436. [2021-11-19 13:43:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51436 states, 51435 states have (on average 1.142023913677457) internal successors, (58740), 51435 states have internal predecessors, (58740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:07,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51436 states to 51436 states and 58740 transitions. [2021-11-19 13:43:07,815 INFO L78 Accepts]: Start accepts. Automaton has 51436 states and 58740 transitions. Word has length 946 [2021-11-19 13:43:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:07,815 INFO L470 AbstractCegarLoop]: Abstraction has 51436 states and 58740 transitions. [2021-11-19 13:43:07,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.3333333333333) internal successors, (880), 2 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:07,816 INFO L276 IsEmpty]: Start isEmpty. Operand 51436 states and 58740 transitions. [2021-11-19 13:43:08,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2021-11-19 13:43:08,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:08,160 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:08,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 13:43:08,161 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:08,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:08,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1540323786, now seen corresponding path program 1 times [2021-11-19 13:43:08,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:08,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392361840] [2021-11-19 13:43:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:08,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 469 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-19 13:43:08,682 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:08,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392361840] [2021-11-19 13:43:08,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392361840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:08,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:08,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:43:08,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762616431] [2021-11-19 13:43:08,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:08,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:43:08,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:08,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:43:08,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:43:08,686 INFO L87 Difference]: Start difference. First operand 51436 states and 58740 transitions. Second operand has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:12,115 INFO L93 Difference]: Finished difference Result 123376 states and 141746 transitions. [2021-11-19 13:43:12,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:43:12,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 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 1037 [2021-11-19 13:43:12,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:12,197 INFO L225 Difference]: With dead ends: 123376 [2021-11-19 13:43:12,197 INFO L226 Difference]: Without dead ends: 72660 [2021-11-19 13:43:12,216 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 [2021-11-19 13:43:12,219 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 712 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2763 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 3126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:12,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 451 Invalid, 3126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2763 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-19 13:43:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72660 states. [2021-11-19 13:43:13,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72660 to 71144. [2021-11-19 13:43:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71144 states, 71143 states have (on average 1.138130244718384) internal successors, (80970), 71143 states have internal predecessors, (80970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:13,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71144 states to 71144 states and 80970 transitions. [2021-11-19 13:43:13,315 INFO L78 Accepts]: Start accepts. Automaton has 71144 states and 80970 transitions. Word has length 1037 [2021-11-19 13:43:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:13,315 INFO L470 AbstractCegarLoop]: Abstraction has 71144 states and 80970 transitions. [2021-11-19 13:43:13,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:13,316 INFO L276 IsEmpty]: Start isEmpty. Operand 71144 states and 80970 transitions. [2021-11-19 13:43:13,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1250 [2021-11-19 13:43:13,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:13,627 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:13,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-19 13:43:13,628 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash 55435256, now seen corresponding path program 1 times [2021-11-19 13:43:13,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:13,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105222891] [2021-11-19 13:43:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:13,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1118 backedges. 842 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-19 13:43:14,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:14,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105222891] [2021-11-19 13:43:14,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105222891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:14,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:14,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:43:14,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107566173] [2021-11-19 13:43:14,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:14,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:43:14,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:14,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:43:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:43:14,295 INFO L87 Difference]: Start difference. First operand 71144 states and 80970 transitions. Second operand has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:17,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:17,965 INFO L93 Difference]: Finished difference Result 163550 states and 187445 transitions. [2021-11-19 13:43:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:43:17,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 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 1249 [2021-11-19 13:43:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:18,057 INFO L225 Difference]: With dead ends: 163550 [2021-11-19 13:43:18,057 INFO L226 Difference]: Without dead ends: 93126 [2021-11-19 13:43:18,249 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 [2021-11-19 13:43:18,251 INFO L933 BasicCegarLoop]: 326 mSDtfsCounter, 783 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 1035 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 3165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1035 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:18,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 332 Invalid, 3165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1035 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 13:43:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93126 states. [2021-11-19 13:43:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93126 to 92368. [2021-11-19 13:43:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92368 states, 92367 states have (on average 1.132114283239685) internal successors, (104570), 92367 states have internal predecessors, (104570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92368 states to 92368 states and 104570 transitions. [2021-11-19 13:43:19,638 INFO L78 Accepts]: Start accepts. Automaton has 92368 states and 104570 transitions. Word has length 1249 [2021-11-19 13:43:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:19,639 INFO L470 AbstractCegarLoop]: Abstraction has 92368 states and 104570 transitions. [2021-11-19 13:43:19,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 350.6666666666667) internal successors, (1052), 3 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 92368 states and 104570 transitions. [2021-11-19 13:43:19,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1298 [2021-11-19 13:43:19,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:19,739 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:19,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 13:43:19,739 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:19,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash -176243352, now seen corresponding path program 1 times [2021-11-19 13:43:19,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:19,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408535237] [2021-11-19 13:43:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:19,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 637 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-19 13:43:20,690 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:20,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408535237] [2021-11-19 13:43:20,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408535237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:20,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:20,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 13:43:20,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654812952] [2021-11-19 13:43:20,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:20,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:43:20,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:20,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:43:20,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:43:20,695 INFO L87 Difference]: Start difference. First operand 92368 states and 104570 transitions. Second operand has 3 states, 3 states have (on average 346.3333333333333) internal successors, (1039), 2 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:24,639 INFO L93 Difference]: Finished difference Result 202966 states and 230651 transitions. [2021-11-19 13:43:24,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:43:24,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 346.3333333333333) internal successors, (1039), 2 states have internal predecessors, (1039), 0 states have call successors, (0), 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 1297 [2021-11-19 13:43:24,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:25,032 INFO L225 Difference]: With dead ends: 202966 [2021-11-19 13:43:25,032 INFO L226 Difference]: Without dead ends: 111318 [2021-11-19 13:43:25,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:43:25,106 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 690 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 967 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 3017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 967 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:25,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 321 Invalid, 3017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [967 Valid, 2050 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-19 13:43:25,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111318 states. [2021-11-19 13:43:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111318 to 109802. [2021-11-19 13:43:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109802 states, 109801 states have (on average 1.112166555860147) internal successors, (122117), 109801 states have internal predecessors, (122117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109802 states to 109802 states and 122117 transitions. [2021-11-19 13:43:27,306 INFO L78 Accepts]: Start accepts. Automaton has 109802 states and 122117 transitions. Word has length 1297 [2021-11-19 13:43:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:27,307 INFO L470 AbstractCegarLoop]: Abstraction has 109802 states and 122117 transitions. [2021-11-19 13:43:27,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 346.3333333333333) internal successors, (1039), 2 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:27,308 INFO L276 IsEmpty]: Start isEmpty. Operand 109802 states and 122117 transitions. [2021-11-19 13:43:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1341 [2021-11-19 13:43:27,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:27,401 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:27,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 13:43:27,401 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:27,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1903037789, now seen corresponding path program 1 times [2021-11-19 13:43:27,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:27,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730294123] [2021-11-19 13:43:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:27,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1322 backedges. 1059 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-11-19 13:43:27,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:27,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730294123] [2021-11-19 13:43:27,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730294123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:27,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:43:27,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:43:27,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275845294] [2021-11-19 13:43:27,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:27,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:43:27,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:43:27,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:43:27,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 13:43:27,947 INFO L87 Difference]: Start difference. First operand 109802 states and 122117 transitions. Second operand has 3 states, 3 states have (on average 383.3333333333333) internal successors, (1150), 3 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:31,358 INFO L93 Difference]: Finished difference Result 220400 states and 245038 transitions. [2021-11-19 13:43:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:43:31,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 383.3333333333333) internal successors, (1150), 3 states have internal predecessors, (1150), 0 states have call successors, (0), 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 1340 [2021-11-19 13:43:31,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:31,477 INFO L225 Difference]: With dead ends: 220400 [2021-11-19 13:43:31,477 INFO L226 Difference]: Without dead ends: 110560 [2021-11-19 13:43:31,524 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 [2021-11-19 13:43:31,525 INFO L933 BasicCegarLoop]: 1245 mSDtfsCounter, 759 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 754 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 2724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 754 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:31,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 1252 Invalid, 2724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [754 Valid, 1970 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-19 13:43:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110560 states. [2021-11-19 13:43:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110560 to 108286. [2021-11-19 13:43:33,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108286 states, 108285 states have (on average 1.0923858336796417) internal successors, (118289), 108285 states have internal predecessors, (118289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:33,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108286 states to 108286 states and 118289 transitions. [2021-11-19 13:43:33,600 INFO L78 Accepts]: Start accepts. Automaton has 108286 states and 118289 transitions. Word has length 1340 [2021-11-19 13:43:33,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:33,601 INFO L470 AbstractCegarLoop]: Abstraction has 108286 states and 118289 transitions. [2021-11-19 13:43:33,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 383.3333333333333) internal successors, (1150), 3 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:43:33,602 INFO L276 IsEmpty]: Start isEmpty. Operand 108286 states and 118289 transitions. [2021-11-19 13:43:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5469 [2021-11-19 13:43:34,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:34,643 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:43:34,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 13:43:34,643 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:34,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:34,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1913613110, now seen corresponding path program 1 times [2021-11-19 13:43:34,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:43:34,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743901712] [2021-11-19 13:43:34,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:34,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:43:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 25900 backedges. 6602 proven. 89 refuted. 0 times theorem prover too weak. 19209 trivial. 0 not checked. [2021-11-19 13:43:41,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:43:41,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743901712] [2021-11-19 13:43:41,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743901712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 13:43:41,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993635640] [2021-11-19 13:43:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:41,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:43:41,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:43:41,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:43:41,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 13:43:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:43,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 6273 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:43:44,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:43:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 25900 backedges. 11596 proven. 0 refuted. 0 times theorem prover too weak. 14304 trivial. 0 not checked. [2021-11-19 13:43:54,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:44:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25900 backedges. 11596 proven. 0 refuted. 0 times theorem prover too weak. 14304 trivial. 0 not checked. [2021-11-19 13:44:04,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993635640] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:44:04,985 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:44:04,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 8 [2021-11-19 13:44:04,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591805081] [2021-11-19 13:44:04,991 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:44:05,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:44:05,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:44:05,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:44:05,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:44:05,013 INFO L87 Difference]: Start difference. First operand 108286 states and 118289 transitions. Second operand has 4 states, 4 states have (on average 416.25) internal successors, (1665), 4 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:10,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:44:10,538 INFO L93 Difference]: Finished difference Result 218126 states and 238181 transitions. [2021-11-19 13:44:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:44:10,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 416.25) internal successors, (1665), 4 states have internal predecessors, (1665), 0 states have call successors, (0), 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 5468 [2021-11-19 13:44:10,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:44:10,664 INFO L225 Difference]: With dead ends: 218126 [2021-11-19 13:44:10,665 INFO L226 Difference]: Without dead ends: 110560 [2021-11-19 13:44:10,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10939 GetRequests, 10933 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:44:10,709 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 881 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5786 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 6227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 5786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:44:10,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 287 Invalid, 6227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 5786 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-19 13:44:10,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110560 states. [2021-11-19 13:44:12,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110560 to 106770. [2021-11-19 13:44:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106770 states, 106769 states have (on average 1.0860736730698985) internal successors, (115959), 106769 states have internal predecessors, (115959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106770 states to 106770 states and 115959 transitions. [2021-11-19 13:44:12,364 INFO L78 Accepts]: Start accepts. Automaton has 106770 states and 115959 transitions. Word has length 5468 [2021-11-19 13:44:12,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:44:12,367 INFO L470 AbstractCegarLoop]: Abstraction has 106770 states and 115959 transitions. [2021-11-19 13:44:12,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 416.25) internal successors, (1665), 4 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:12,367 INFO L276 IsEmpty]: Start isEmpty. Operand 106770 states and 115959 transitions. [2021-11-19 13:44:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5708 [2021-11-19 13:44:13,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:13,326 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:44:13,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 13:44:13,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9407786d-e003-4182-ab61-d5dee5d0f6ae/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 13:44:13,551 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:13,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1299249470, now seen corresponding path program 1 times [2021-11-19 13:44:13,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:44:13,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789967526] [2021-11-19 13:44:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:13,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:44:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:21,225 INFO L134 CoverageAnalysis]: Checked inductivity of 24234 backedges. 5084 proven. 0 refuted. 0 times theorem prover too weak. 19150 trivial. 0 not checked. [2021-11-19 13:44:21,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 13:44:21,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789967526] [2021-11-19 13:44:21,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789967526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 13:44:21,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:44:21,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 13:44:21,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149437413] [2021-11-19 13:44:21,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:44:21,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:44:21,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 13:44:21,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:44:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:44:21,237 INFO L87 Difference]: Start difference. First operand 106770 states and 115959 transitions. Second operand has 4 states, 4 states have (on average 349.75) internal successors, (1399), 3 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:26,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:44:26,301 INFO L93 Difference]: Finished difference Result 215094 states and 233569 transitions. [2021-11-19 13:44:26,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:44:26,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 349.75) internal successors, (1399), 3 states have internal predecessors, (1399), 0 states have call successors, (0), 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 5707 [2021-11-19 13:44:26,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:44:26,432 INFO L225 Difference]: With dead ends: 215094 [2021-11-19 13:44:26,432 INFO L226 Difference]: Without dead ends: 108286 [2021-11-19 13:44:26,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:44:26,483 INFO L933 BasicCegarLoop]: 460 mSDtfsCounter, 1924 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 2868 mSolverCounterSat, 1409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 4277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1409 IncrementalHoareTripleChecker+Valid, 2868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:44:26,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1924 Valid, 473 Invalid, 4277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1409 Valid, 2868 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-19 13:44:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108286 states. [2021-11-19 13:44:27,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108286 to 108286. [2021-11-19 13:44:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108286 states, 108285 states have (on average 1.0253590063258993) internal successors, (111031), 108285 states have internal predecessors, (111031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108286 states to 108286 states and 111031 transitions. [2021-11-19 13:44:28,058 INFO L78 Accepts]: Start accepts. Automaton has 108286 states and 111031 transitions. Word has length 5707 [2021-11-19 13:44:28,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:44:28,060 INFO L470 AbstractCegarLoop]: Abstraction has 108286 states and 111031 transitions. [2021-11-19 13:44:28,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 349.75) internal successors, (1399), 3 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:44:28,060 INFO L276 IsEmpty]: Start isEmpty. Operand 108286 states and 111031 transitions. [2021-11-19 13:44:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5742 [2021-11-19 13:44:29,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:29,096 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:44:29,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 13:44:29,096 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:29,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash -259714881, now seen corresponding path program 1 times [2021-11-19 13:44:29,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 13:44:29,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225652481] [2021-11-19 13:44:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:29,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 13:44:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat