./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 97351642d4f3bf3f6d868e0a3719427b4c33bd5e0f87a93a325784728b912f03 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:37:26,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:37:26,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:37:26,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:37:26,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:37:26,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:37:26,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:37:26,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:37:26,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:37:26,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:37:26,296 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:37:26,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:37:26,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:37:26,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:37:26,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:37:26,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:37:26,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:37:26,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:37:26,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:37:26,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:37:26,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:37:26,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:37:26,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:37:26,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:37:26,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:37:26,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:37:26,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:37:26,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:37:26,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:37:26,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:37:26,327 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:37:26,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:37:26,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:37:26,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:37:26,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:37:26,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:37:26,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:37:26,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:37:26,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:37:26,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:37:26,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:37:26,346 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-20 23:37:26,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:37:26,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:37:26,405 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:37:26,405 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:37:26,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:37:26,406 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:37:26,407 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:37:26,407 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:37:26,407 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:37:26,407 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:37:26,407 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:37:26,408 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:37:26,408 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:37:26,408 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:37:26,408 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:37:26,408 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:37:26,409 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:37:26,409 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:37:26,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 23:37:26,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 23:37:26,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:37:26,410 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:37:26,417 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 23:37:26,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:37:26,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:37:26,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:37:26,420 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 23:37:26,420 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 23:37:26,421 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 23:37:26,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:37:26,421 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 23:37:26,422 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:37:26,422 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:37:26,422 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:37:26,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:37:26,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:37:26,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:37:26,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:37:26,424 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:37:26,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:37:26,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:37:26,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:37:26,425 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_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97351642d4f3bf3f6d868e0a3719427b4c33bd5e0f87a93a325784728b912f03 [2021-11-20 23:37:26,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:37:26,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:37:26,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:37:26,696 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:37:26,697 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:37:26,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/list-simple/dll2n_insert_unequal.i [2021-11-20 23:37:26,771 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/data/8f13b17d8/f5fd04b95e1b476cb9bb5510e4594037/FLAG5bf47c768 [2021-11-20 23:37:27,295 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:37:27,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/sv-benchmarks/c/list-simple/dll2n_insert_unequal.i [2021-11-20 23:37:27,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/data/8f13b17d8/f5fd04b95e1b476cb9bb5510e4594037/FLAG5bf47c768 [2021-11-20 23:37:27,594 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/data/8f13b17d8/f5fd04b95e1b476cb9bb5510e4594037 [2021-11-20 23:37:27,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:37:27,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:37:27,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:37:27,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:37:27,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:37:27,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:37:27" (1/1) ... [2021-11-20 23:37:27,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77037878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:27, skipping insertion in model container [2021-11-20 23:37:27,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:37:27" (1/1) ... [2021-11-20 23:37:27,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:37:27,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:37:28,013 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_85aca922-eb92-4035-9f06-d1603e51e966/sv-benchmarks/c/list-simple/dll2n_insert_unequal.i[24989,25002] [2021-11-20 23:37:28,024 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:37:28,035 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:37:28,124 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_85aca922-eb92-4035-9f06-d1603e51e966/sv-benchmarks/c/list-simple/dll2n_insert_unequal.i[24989,25002] [2021-11-20 23:37:28,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:37:28,171 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:37:28,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28 WrapperNode [2021-11-20 23:37:28,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:37:28,174 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:37:28,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:37:28,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:37:28,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2021-11-20 23:37:28,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2021-11-20 23:37:28,266 INFO L137 Inliner]: procedures = 127, calls = 48, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 168 [2021-11-20 23:37:28,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:37:28,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:37:28,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:37:28,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:37:28,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2021-11-20 23:37:28,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2021-11-20 23:37:28,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2021-11-20 23:37:28,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2021-11-20 23:37:28,295 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2021-11-20 23:37:28,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2021-11-20 23:37:28,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2021-11-20 23:37:28,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:37:28,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:37:28,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:37:28,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:37:28,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2021-11-20 23:37:28,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:37:28,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:28,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:37:28,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:37:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-20 23:37:28,391 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-20 23:37:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:37:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:37:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:37:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:37:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:37:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:37:28,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:37:28,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:37:28,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:37:28,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:37:28,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:37:28,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:37:28,502 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:37:28,504 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:37:28,545 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-20 23:37:29,083 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:37:29,184 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:37:29,184 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-20 23:37:29,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:37:29 BoogieIcfgContainer [2021-11-20 23:37:29,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:37:29,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:37:29,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:37:29,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:37:29,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:37:27" (1/3) ... [2021-11-20 23:37:29,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efe0edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:37:29, skipping insertion in model container [2021-11-20 23:37:29,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (2/3) ... [2021-11-20 23:37:29,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efe0edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:37:29, skipping insertion in model container [2021-11-20 23:37:29,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:37:29" (3/3) ... [2021-11-20 23:37:29,197 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_insert_unequal.i [2021-11-20 23:37:29,204 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:37:29,204 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2021-11-20 23:37:29,283 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:37:29,296 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-20 23:37:29,296 INFO L340 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2021-11-20 23:37:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 115 states have internal predecessors, (129), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:29,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 23:37:29,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:29,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 23:37:29,348 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:37:29,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:29,355 INFO L85 PathProgramCache]: Analyzing trace with hash 8357563, now seen corresponding path program 1 times [2021-11-20 23:37:29,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:29,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359450438] [2021-11-20 23:37:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:29,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:29,610 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:29,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359450438] [2021-11-20 23:37:29,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359450438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:29,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:29,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:37:29,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808736752] [2021-11-20 23:37:29,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:29,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:37:29,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:29,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:37:29,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:37:29,663 INFO L87 Difference]: Start difference. First operand has 117 states, 53 states have (on average 2.4339622641509435) internal successors, (129), 115 states have internal predecessors, (129), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:29,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:29,973 INFO L93 Difference]: Finished difference Result 209 states and 234 transitions. [2021-11-20 23:37:29,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:37:29,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-20 23:37:29,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:29,989 INFO L225 Difference]: With dead ends: 209 [2021-11-20 23:37:29,989 INFO L226 Difference]: Without dead ends: 203 [2021-11-20 23:37:29,991 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 [2021-11-20 23:37:29,995 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 115 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:29,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 202 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:37:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-20 23:37:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 109. [2021-11-20 23:37:30,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 51 states have (on average 2.3529411764705883) internal successors, (120), 108 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2021-11-20 23:37:30,062 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 4 [2021-11-20 23:37:30,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:30,062 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2021-11-20 23:37:30,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,063 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2021-11-20 23:37:30,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 23:37:30,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:30,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 23:37:30,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:37:30,065 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:37:30,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:30,068 INFO L85 PathProgramCache]: Analyzing trace with hash 8357564, now seen corresponding path program 1 times [2021-11-20 23:37:30,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:30,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34989280] [2021-11-20 23:37:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:30,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:30,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:30,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34989280] [2021-11-20 23:37:30,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34989280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:30,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:30,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:37:30,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125605197] [2021-11-20 23:37:30,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:30,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:37:30,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:30,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:37:30,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:37:30,155 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:30,350 INFO L93 Difference]: Finished difference Result 202 states and 223 transitions. [2021-11-20 23:37:30,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:37:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-20 23:37:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:30,359 INFO L225 Difference]: With dead ends: 202 [2021-11-20 23:37:30,359 INFO L226 Difference]: Without dead ends: 202 [2021-11-20 23:37:30,362 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 [2021-11-20 23:37:30,364 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 113 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:30,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 197 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:37:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-20 23:37:30,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 106. [2021-11-20 23:37:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 51 states have (on average 2.2941176470588234) internal successors, (117), 105 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2021-11-20 23:37:30,375 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 4 [2021-11-20 23:37:30,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:30,376 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2021-11-20 23:37:30,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2021-11-20 23:37:30,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-20 23:37:30,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:30,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-20 23:37:30,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:37:30,377 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:37:30,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:30,378 INFO L85 PathProgramCache]: Analyzing trace with hash 8595954, now seen corresponding path program 1 times [2021-11-20 23:37:30,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:30,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166727879] [2021-11-20 23:37:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:30,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:30,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:30,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166727879] [2021-11-20 23:37:30,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166727879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:30,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:30,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:37:30,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256407154] [2021-11-20 23:37:30,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:30,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:37:30,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:30,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:37:30,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:37:30,431 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:30,475 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2021-11-20 23:37:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:37:30,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-20 23:37:30,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:30,477 INFO L225 Difference]: With dead ends: 116 [2021-11-20 23:37:30,477 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 23:37:30,477 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 [2021-11-20 23:37:30,484 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 10 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:30,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 194 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:37:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 23:37:30,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2021-11-20 23:37:30,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 52 states have (on average 2.269230769230769) internal successors, (118), 106 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2021-11-20 23:37:30,506 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 4 [2021-11-20 23:37:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:30,506 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2021-11-20 23:37:30,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2021-11-20 23:37:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:37:30,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:30,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:30,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:37:30,508 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:37:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:30,508 INFO L85 PathProgramCache]: Analyzing trace with hash 328619199, now seen corresponding path program 1 times [2021-11-20 23:37:30,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:30,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492335840] [2021-11-20 23:37:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:30,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:30,587 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:30,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492335840] [2021-11-20 23:37:30,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492335840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:30,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:30,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:37:30,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277389843] [2021-11-20 23:37:30,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:30,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:37:30,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:30,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:37:30,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:37:30,590 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:30,634 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-11-20 23:37:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:37:30,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-20 23:37:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:30,636 INFO L225 Difference]: With dead ends: 113 [2021-11-20 23:37:30,636 INFO L226 Difference]: Without dead ends: 113 [2021-11-20 23:37:30,636 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 [2021-11-20 23:37:30,637 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:30,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 191 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:37:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-20 23:37:30,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2021-11-20 23:37:30,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 57 states have (on average 2.1578947368421053) internal successors, (123), 111 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2021-11-20 23:37:30,644 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 8 [2021-11-20 23:37:30,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:30,644 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2021-11-20 23:37:30,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,644 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2021-11-20 23:37:30,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:37:30,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:30,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:30,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:37:30,646 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:37:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:30,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1669110859, now seen corresponding path program 1 times [2021-11-20 23:37:30,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:30,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205548588] [2021-11-20 23:37:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:30,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:30,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:37:30,703 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:30,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205548588] [2021-11-20 23:37:30,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205548588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:30,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:30,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:37:30,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516547095] [2021-11-20 23:37:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:30,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:37:30,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:37:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:37:30,714 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:30,815 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2021-11-20 23:37:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:37:30,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-11-20 23:37:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:30,817 INFO L225 Difference]: With dead ends: 119 [2021-11-20 23:37:30,817 INFO L226 Difference]: Without dead ends: 119 [2021-11-20 23:37:30,818 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 [2021-11-20 23:37:30,819 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 97 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:30,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 68 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:37:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-20 23:37:30,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2021-11-20 23:37:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 108 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2021-11-20 23:37:30,825 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 11 [2021-11-20 23:37:30,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:30,825 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2021-11-20 23:37:30,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2021-11-20 23:37:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:37:30,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:30,826 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:30,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:37:30,827 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:37:30,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:30,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1669110860, now seen corresponding path program 1 times [2021-11-20 23:37:30,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:30,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604900483] [2021-11-20 23:37:30,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:30,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:30,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:30,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604900483] [2021-11-20 23:37:30,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604900483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:37:30,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130137357] [2021-11-20 23:37:30,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:30,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:30,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:30,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:30,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:37:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:30,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:37:30,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:31,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:31,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130137357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:37:31,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1655334674] [2021-11-20 23:37:31,180 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-20 23:37:31,180 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:37:31,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:37:31,195 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:37:31,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:37:31,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:31,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:31,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 23:37:31,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:31,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:31,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:31,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:31,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:31,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-20 23:37:31,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:31,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 23:37:31,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:37:31,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:37:32,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-20 23:37:32,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:37:32,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:37:32,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:37:32,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:37:32,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-20 23:37:32,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:32,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-20 23:37:33,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-20 23:37:33,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-20 23:37:33,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-20 23:37:33,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-20 23:37:33,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-20 23:37:33,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-20 23:37:33,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:33,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:33,926 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:37:33,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 407 treesize of output 406 [2021-11-20 23:37:33,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:33,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:33,959 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:37:33,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 403 treesize of output 384 [2021-11-20 23:37:33,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:33,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:33,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:34,002 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:37:34,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 384 treesize of output 383 [2021-11-20 23:37:35,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-20 23:37:35,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-20 23:37:35,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-20 23:37:35,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-20 23:37:35,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:35,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-20 23:37:36,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:36,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:36,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-20 23:37:36,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:36,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:36,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-20 23:37:36,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:36,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:36,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:36,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:36,474 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:37:36,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 407 treesize of output 406 [2021-11-20 23:37:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:36,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:36,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:36,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:36,517 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:37:36,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 403 treesize of output 402 [2021-11-20 23:37:36,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:36,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:36,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:36,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:36,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:36,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:36,551 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:37:36,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 399 treesize of output 380 [2021-11-20 23:37:37,583 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-11-20 23:37:37,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 454 treesize of output 463 [2021-11-20 23:37:42,042 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-20 23:37:42,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 387 treesize of output 384 [2021-11-20 23:37:42,090 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-20 23:37:42,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 383 treesize of output 374 [2021-11-20 23:37:42,130 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-20 23:37:42,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 368 treesize of output 359 [2021-11-20 23:37:43,154 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:37:44,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1655334674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:44,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:37:44,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2021-11-20 23:37:44,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658587198] [2021-11-20 23:37:44,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:44,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 23:37:44,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:44,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 23:37:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:37:44,999 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:45,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:45,297 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2021-11-20 23:37:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:37:45,298 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-11-20 23:37:45,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:45,298 INFO L225 Difference]: With dead ends: 119 [2021-11-20 23:37:45,299 INFO L226 Difference]: Without dead ends: 119 [2021-11-20 23:37:45,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:37:45,300 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:45,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 137 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 196 Unchecked, 0.3s Time] [2021-11-20 23:37:45,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-20 23:37:45,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2021-11-20 23:37:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 64 states have (on average 2.0) internal successors, (128), 115 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2021-11-20 23:37:45,306 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 11 [2021-11-20 23:37:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:45,306 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2021-11-20 23:37:45,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2021-11-20 23:37:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 23:37:45,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:45,307 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-20 23:37:45,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:37:45,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:45,519 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:37:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:45,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1653804392, now seen corresponding path program 1 times [2021-11-20 23:37:45,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:45,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109371022] [2021-11-20 23:37:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:45,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:45,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:45,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109371022] [2021-11-20 23:37:45,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109371022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:37:45,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63988196] [2021-11-20 23:37:45,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:45,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:45,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:45,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:45,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:37:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:45,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:37:45,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:45,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:37:45,762 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:37:45,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 23:37:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:45,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:37:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:45,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63988196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:37:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1365616493] [2021-11-20 23:37:45,992 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-20 23:37:45,992 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:37:45,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:37:45,993 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:37:45,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:37:46,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 23:37:46,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-20 23:37:46,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 23:37:46,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:37:46,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:37:46,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-20 23:37:46,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:37:46,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:37:46,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:37:46,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-20 23:37:46,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:46,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:37:47,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-20 23:37:47,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-20 23:37:47,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-20 23:37:47,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-20 23:37:47,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 23:37:47,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-20 23:37:47,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:47,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 23:37:48,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:48,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:48,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:48,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:48,141 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:37:48,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 399 treesize of output 398 [2021-11-20 23:37:48,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:48,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:48,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:48,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:48,168 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:37:48,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 395 treesize of output 394 [2021-11-20 23:37:48,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:48,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:48,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:48,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:48,192 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:37:48,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 391 treesize of output 372 [2021-11-20 23:37:49,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-20 23:37:49,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-20 23:37:49,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-20 23:37:49,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-20 23:37:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:49,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-20 23:37:50,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:50,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:50,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-20 23:37:50,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:50,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:50,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-20 23:37:50,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:50,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:50,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:50,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:50,299 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:37:50,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 399 treesize of output 398 [2021-11-20 23:37:50,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:50,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:50,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:50,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:50,319 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 23:37:50,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 395 treesize of output 376 [2021-11-20 23:37:50,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:50,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:50,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:50,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:37:50,346 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 23:37:50,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 376 treesize of output 375 [2021-11-20 23:37:51,603 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-11-20 23:37:51,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 452 treesize of output 459 [2021-11-20 23:37:54,446 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-20 23:37:54,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 381 treesize of output 372 [2021-11-20 23:37:54,480 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-20 23:37:54,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 366 treesize of output 363 [2021-11-20 23:37:54,527 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-20 23:37:54,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 362 treesize of output 353 [2021-11-20 23:37:54,933 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:37:57,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1365616493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:57,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:37:57,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4, 4] total 14 [2021-11-20 23:37:57,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381078267] [2021-11-20 23:37:57,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:57,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:37:57,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:57,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:37:57,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-20 23:37:57,015 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:57,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:57,941 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2021-11-20 23:37:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:37:57,941 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 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 15 [2021-11-20 23:37:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:57,942 INFO L225 Difference]: With dead ends: 118 [2021-11-20 23:37:57,942 INFO L226 Difference]: Without dead ends: 118 [2021-11-20 23:37:57,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:37:57,943 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 5 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:57,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 197 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:37:57,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-20 23:37:57,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-11-20 23:37:57,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 116 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2021-11-20 23:37:57,948 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 15 [2021-11-20 23:37:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:57,949 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2021-11-20 23:37:57,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:57,949 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2021-11-20 23:37:57,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:37:57,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:57,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:57,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 23:37:58,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 23:37:58,172 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:37:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1644873912, now seen corresponding path program 1 times [2021-11-20 23:37:58,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:58,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593546389] [2021-11-20 23:37:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:58,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:37:58,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:58,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593546389] [2021-11-20 23:37:58,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593546389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:37:58,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:37:58,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:37:58,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337106673] [2021-11-20 23:37:58,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:37:58,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:37:58,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:37:58,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:37:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:37:58,263 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:37:58,333 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2021-11-20 23:37:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:37:58,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 19 [2021-11-20 23:37:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:37:58,334 INFO L225 Difference]: With dead ends: 114 [2021-11-20 23:37:58,334 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 23:37:58,334 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 [2021-11-20 23:37:58,335 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 97 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:37:58,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 64 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:37:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 23:37:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-20 23:37:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 113 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2021-11-20 23:37:58,339 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 19 [2021-11-20 23:37:58,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:37:58,340 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2021-11-20 23:37:58,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:37:58,340 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2021-11-20 23:37:58,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:37:58,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:37:58,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:37:58,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:37:58,341 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:37:58,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:37:58,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1156837450, now seen corresponding path program 1 times [2021-11-20 23:37:58,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:37:58,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450060539] [2021-11-20 23:37:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:58,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:37:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:58,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:37:58,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:37:58,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450060539] [2021-11-20 23:37:58,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450060539] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:37:58,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970109414] [2021-11-20 23:37:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:37:58,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:37:58,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:37:58,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:37:58,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:37:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:37:58,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:37:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:37:58,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:37:58,661 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:37:58,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 23:37:58,756 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:37:58,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 27 [2021-11-20 23:37:58,940 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:37:58,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 27 [2021-11-20 23:37:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:37:59,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:11,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970109414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:38:11,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2075224241] [2021-11-20 23:38:11,517 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-20 23:38:11,517 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:38:11,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:38:11,518 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:38:11,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:38:11,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:11,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:11,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 23:38:11,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:11,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:11,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:11,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:11,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-20 23:38:11,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:11,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-20 23:38:11,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:38:12,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:38:12,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:38:12,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-20 23:38:12,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:38:12,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:38:12,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-20 23:38:12,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:38:12,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:12,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-20 23:38:13,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-20 23:38:13,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-20 23:38:13,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-20 23:38:13,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 23:38:13,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 23:38:13,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-20 23:38:13,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-20 23:38:13,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-20 23:38:13,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:13,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-20 23:38:14,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:14,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:14,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:38:14,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2021-11-20 23:38:14,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:14,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:14,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:38:14,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2021-11-20 23:38:14,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:14,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:14,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:14,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:14,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:14,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-20 23:38:15,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:15,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:15,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:15,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:15,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:15,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:15,523 INFO L354 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2021-11-20 23:38:15,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 46 [2021-11-20 23:38:15,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:15,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:15,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-20 23:38:16,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 28 [2021-11-20 23:38:16,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-20 23:38:16,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-20 23:38:16,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-20 23:38:16,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-11-20 23:38:16,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2021-11-20 23:38:16,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-20 23:38:16,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:16,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2021-11-20 23:38:17,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:17,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:17,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:17,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2021-11-20 23:38:17,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:17,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:17,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:17,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2021-11-20 23:38:17,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:17,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:17,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:17,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:17,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:17,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-20 23:38:18,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:38:18,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:38:19,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:38:19,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 23:38:19,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 23:38:19,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:38:19,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-20 23:38:19,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:38:19,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:38:19,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-20 23:38:19,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:38:19,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:38:19,781 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-20 23:38:19,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 39 [2021-11-20 23:38:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:19,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:38:19,885 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-20 23:38:19,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 39 [2021-11-20 23:38:20,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:38:20,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:38:20,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:38:20,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:38:20,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:38:20,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:38:20,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:38:20,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:20,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:20,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:38:20,975 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:38:20,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 224 [2021-11-20 23:38:21,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:21,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 23:38:21,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:21,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:38:21,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:21,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:38:21,701 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:38:24,242 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:38:24,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:38:24,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-11-20 23:38:24,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377472114] [2021-11-20 23:38:24,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:38:24,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 23:38:24,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:24,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 23:38:24,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=662, Unknown=3, NotChecked=0, Total=812 [2021-11-20 23:38:24,245 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 17 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:26,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:26,713 INFO L93 Difference]: Finished difference Result 184 states and 213 transitions. [2021-11-20 23:38:26,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 23:38:26,714 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 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 22 [2021-11-20 23:38:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:26,715 INFO L225 Difference]: With dead ends: 184 [2021-11-20 23:38:26,715 INFO L226 Difference]: Without dead ends: 184 [2021-11-20 23:38:26,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=234, Invalid=1022, Unknown=4, NotChecked=0, Total=1260 [2021-11-20 23:38:26,717 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 79 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:26,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 573 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 264 Invalid, 0 Unknown, 193 Unchecked, 0.3s Time] [2021-11-20 23:38:26,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-20 23:38:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 131. [2021-11-20 23:38:26,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.7647058823529411) internal successors, (150), 130 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2021-11-20 23:38:26,731 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 22 [2021-11-20 23:38:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:26,732 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2021-11-20 23:38:26,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2021-11-20 23:38:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 23:38:26,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:26,734 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:26,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:26,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 23:38:26,953 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:26,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:26,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1156837451, now seen corresponding path program 1 times [2021-11-20 23:38:26,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:26,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979764354] [2021-11-20 23:38:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:26,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 23:38:27,171 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:27,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979764354] [2021-11-20 23:38:27,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979764354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:38:27,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657615253] [2021-11-20 23:38:27,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:27,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:38:27,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:38:27,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:38:27,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:38:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:27,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 23:38:27,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:27,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:38:27,305 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 23:38:27,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 17 [2021-11-20 23:38:27,489 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:38:27,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-11-20 23:38:27,732 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:38:27,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 32 [2021-11-20 23:38:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 23:38:27,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:38:27,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657615253] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:27,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:38:27,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-20 23:38:27,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650020267] [2021-11-20 23:38:27,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:27,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:38:27,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:27,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:38:27,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:38:27,866 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:27,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:27,968 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2021-11-20 23:38:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:38:27,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 22 [2021-11-20 23:38:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:27,970 INFO L225 Difference]: With dead ends: 130 [2021-11-20 23:38:27,970 INFO L226 Difference]: Without dead ends: 130 [2021-11-20 23:38:27,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:38:27,971 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:27,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 170 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2021-11-20 23:38:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-20 23:38:27,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-20 23:38:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 85 states have (on average 1.7411764705882353) internal successors, (148), 129 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2021-11-20 23:38:27,981 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 22 [2021-11-20 23:38:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:27,981 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2021-11-20 23:38:27,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2021-11-20 23:38:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 23:38:27,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:27,984 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-20 23:38:28,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:38:28,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:38:28,207 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:28,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:28,207 INFO L85 PathProgramCache]: Analyzing trace with hash 385288452, now seen corresponding path program 1 times [2021-11-20 23:38:28,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:28,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64297109] [2021-11-20 23:38:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:28,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:28,258 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:28,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64297109] [2021-11-20 23:38:28,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64297109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:28,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:28,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:38:28,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128467512] [2021-11-20 23:38:28,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:28,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:38:28,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:28,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:38:28,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:28,261 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:28,297 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2021-11-20 23:38:28,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:38:28,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-11-20 23:38:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:28,299 INFO L225 Difference]: With dead ends: 103 [2021-11-20 23:38:28,300 INFO L226 Difference]: Without dead ends: 101 [2021-11-20 23:38:28,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:28,301 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 285 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:28,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 102 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:38:28,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-20 23:38:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-11-20 23:38:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 100 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2021-11-20 23:38:28,306 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 23 [2021-11-20 23:38:28,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:28,308 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2021-11-20 23:38:28,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2021-11-20 23:38:28,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 23:38:28,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:28,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:28,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:38:28,314 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:28,315 INFO L85 PathProgramCache]: Analyzing trace with hash -675566594, now seen corresponding path program 1 times [2021-11-20 23:38:28,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:28,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779900106] [2021-11-20 23:38:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:28,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 23:38:28,519 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:28,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779900106] [2021-11-20 23:38:28,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779900106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:28,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:28,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:38:28,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056292740] [2021-11-20 23:38:28,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:28,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:38:28,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:38:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:38:28,521 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:29,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:29,008 INFO L93 Difference]: Finished difference Result 186 states and 206 transitions. [2021-11-20 23:38:29,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 23:38:29,010 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 24 [2021-11-20 23:38:29,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:29,012 INFO L225 Difference]: With dead ends: 186 [2021-11-20 23:38:29,012 INFO L226 Difference]: Without dead ends: 186 [2021-11-20 23:38:29,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-20 23:38:29,013 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 483 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:29,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 136 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:38:29,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-20 23:38:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 109. [2021-11-20 23:38:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 108 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 129 transitions. [2021-11-20 23:38:29,021 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 129 transitions. Word has length 24 [2021-11-20 23:38:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:29,022 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 129 transitions. [2021-11-20 23:38:29,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 129 transitions. [2021-11-20 23:38:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 23:38:29,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:29,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:29,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 23:38:29,024 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:29,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash -675566593, now seen corresponding path program 1 times [2021-11-20 23:38:29,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:29,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197725716] [2021-11-20 23:38:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:29,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:38:29,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:29,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197725716] [2021-11-20 23:38:29,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197725716] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:29,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:29,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 23:38:29,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779450150] [2021-11-20 23:38:29,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:29,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:38:29,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:29,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:38:29,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:38:29,334 INFO L87 Difference]: Start difference. First operand 109 states and 129 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:29,913 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2021-11-20 23:38:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 23:38:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-11-20 23:38:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:29,916 INFO L225 Difference]: With dead ends: 196 [2021-11-20 23:38:29,916 INFO L226 Difference]: Without dead ends: 196 [2021-11-20 23:38:29,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-20 23:38:29,917 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 666 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:29,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 69 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:38:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-20 23:38:29,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 109. [2021-11-20 23:38:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 108 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2021-11-20 23:38:29,924 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 24 [2021-11-20 23:38:29,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:29,925 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2021-11-20 23:38:29,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2021-11-20 23:38:29,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 23:38:29,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:29,932 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:29,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 23:38:29,933 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:29,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:29,933 INFO L85 PathProgramCache]: Analyzing trace with hash 532451152, now seen corresponding path program 1 times [2021-11-20 23:38:29,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:29,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310674235] [2021-11-20 23:38:29,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:29,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:38:30,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:30,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310674235] [2021-11-20 23:38:30,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310674235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:30,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:30,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:38:30,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588008896] [2021-11-20 23:38:30,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:30,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:38:30,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:30,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:38:30,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:38:30,007 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:30,063 INFO L93 Difference]: Finished difference Result 149 states and 164 transitions. [2021-11-20 23:38:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:38:30,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 25 [2021-11-20 23:38:30,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:30,067 INFO L225 Difference]: With dead ends: 149 [2021-11-20 23:38:30,067 INFO L226 Difference]: Without dead ends: 149 [2021-11-20 23:38:30,068 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 [2021-11-20 23:38:30,069 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 68 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:30,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 151 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:38:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-20 23:38:30,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 104. [2021-11-20 23:38:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 1.8387096774193548) internal successors, (114), 103 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2021-11-20 23:38:30,074 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 25 [2021-11-20 23:38:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:30,074 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2021-11-20 23:38:30,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2021-11-20 23:38:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 23:38:30,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:30,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:30,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 23:38:30,078 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:30,078 INFO L85 PathProgramCache]: Analyzing trace with hash 532451792, now seen corresponding path program 1 times [2021-11-20 23:38:30,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:30,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719516846] [2021-11-20 23:38:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:30,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:38:30,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:30,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719516846] [2021-11-20 23:38:30,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719516846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:30,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:30,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:38:30,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231158095] [2021-11-20 23:38:30,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:30,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:38:30,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:38:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:38:30,135 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:30,219 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-11-20 23:38:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:38:30,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 25 [2021-11-20 23:38:30,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:30,220 INFO L225 Difference]: With dead ends: 113 [2021-11-20 23:38:30,220 INFO L226 Difference]: Without dead ends: 113 [2021-11-20 23:38:30,220 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 [2021-11-20 23:38:30,221 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 82 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:30,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 64 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:38:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-20 23:38:30,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2021-11-20 23:38:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.8225806451612903) internal successors, (113), 102 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2021-11-20 23:38:30,226 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 25 [2021-11-20 23:38:30,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:30,227 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2021-11-20 23:38:30,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2021-11-20 23:38:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 23:38:30,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:30,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:30,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 23:38:30,228 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:30,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash 532451793, now seen corresponding path program 1 times [2021-11-20 23:38:30,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:30,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026819356] [2021-11-20 23:38:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:30,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:38:30,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:30,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026819356] [2021-11-20 23:38:30,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026819356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:30,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:30,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:38:30,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41818651] [2021-11-20 23:38:30,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:30,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:38:30,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:30,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:38:30,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:30,288 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:30,406 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2021-11-20 23:38:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:38:30,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 25 [2021-11-20 23:38:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:30,407 INFO L225 Difference]: With dead ends: 99 [2021-11-20 23:38:30,408 INFO L226 Difference]: Without dead ends: 99 [2021-11-20 23:38:30,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:38:30,409 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 171 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:30,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 70 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:38:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-20 23:38:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-20 23:38:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.7580645161290323) internal successors, (109), 98 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2021-11-20 23:38:30,413 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 25 [2021-11-20 23:38:30,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:30,413 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2021-11-20 23:38:30,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,414 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2021-11-20 23:38:30,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 23:38:30,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:30,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:30,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 23:38:30,415 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:30,416 INFO L85 PathProgramCache]: Analyzing trace with hash -679271128, now seen corresponding path program 1 times [2021-11-20 23:38:30,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:30,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544802596] [2021-11-20 23:38:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:30,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:38:30,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:30,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544802596] [2021-11-20 23:38:30,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544802596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:30,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:30,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:38:30,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370806519] [2021-11-20 23:38:30,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:30,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:38:30,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:30,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:38:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:30,483 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:30,548 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2021-11-20 23:38:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:38:30,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 26 [2021-11-20 23:38:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:30,549 INFO L225 Difference]: With dead ends: 96 [2021-11-20 23:38:30,549 INFO L226 Difference]: Without dead ends: 96 [2021-11-20 23:38:30,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:38:30,550 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 243 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:30,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 89 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:38:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-20 23:38:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-20 23:38:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.721311475409836) internal successors, (105), 95 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-11-20 23:38:30,553 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 26 [2021-11-20 23:38:30,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:30,553 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-11-20 23:38:30,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,553 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-11-20 23:38:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 23:38:30,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:30,554 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:30,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 23:38:30,554 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:30,554 INFO L85 PathProgramCache]: Analyzing trace with hash -673863548, now seen corresponding path program 1 times [2021-11-20 23:38:30,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:30,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347250708] [2021-11-20 23:38:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:30,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:38:30,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:30,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347250708] [2021-11-20 23:38:30,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347250708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:30,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:30,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:38:30,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908770423] [2021-11-20 23:38:30,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:30,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:38:30,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:30,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:38:30,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:38:30,596 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:30,714 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2021-11-20 23:38:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:38:30,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 26 [2021-11-20 23:38:30,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:30,716 INFO L225 Difference]: With dead ends: 103 [2021-11-20 23:38:30,716 INFO L226 Difference]: Without dead ends: 103 [2021-11-20 23:38:30,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:30,717 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 150 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:30,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 66 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:38:30,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-20 23:38:30,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2021-11-20 23:38:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 92 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-11-20 23:38:30,722 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 26 [2021-11-20 23:38:30,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:30,722 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-11-20 23:38:30,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-11-20 23:38:30,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 23:38:30,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:30,723 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:30,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 23:38:30,723 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:30,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash -673863547, now seen corresponding path program 1 times [2021-11-20 23:38:30,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:30,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736352116] [2021-11-20 23:38:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:30,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:38:30,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:30,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736352116] [2021-11-20 23:38:30,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736352116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:30,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:30,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:38:30,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249592215] [2021-11-20 23:38:30,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:30,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:38:30,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:30,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:38:30,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:38:30,790 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:30,840 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2021-11-20 23:38:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:38:30,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 26 [2021-11-20 23:38:30,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:30,842 INFO L225 Difference]: With dead ends: 92 [2021-11-20 23:38:30,842 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 23:38:30,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:30,843 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 84 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:30,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 145 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 23:38:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 23:38:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-20 23:38:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 91 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-11-20 23:38:30,848 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 26 [2021-11-20 23:38:30,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:30,848 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-11-20 23:38:30,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:30,849 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-11-20 23:38:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 23:38:30,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:30,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:30,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 23:38:30,850 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:30,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:30,851 INFO L85 PathProgramCache]: Analyzing trace with hash 417610598, now seen corresponding path program 1 times [2021-11-20 23:38:30,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:30,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130578437] [2021-11-20 23:38:30,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:30,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:38:30,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:30,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130578437] [2021-11-20 23:38:30,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130578437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:30,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:30,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:38:30,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972237919] [2021-11-20 23:38:30,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:30,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:38:30,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:30,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:38:30,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:38:30,903 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:31,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:31,072 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2021-11-20 23:38:31,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:38:31,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 27 [2021-11-20 23:38:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:31,074 INFO L225 Difference]: With dead ends: 144 [2021-11-20 23:38:31,074 INFO L226 Difference]: Without dead ends: 144 [2021-11-20 23:38:31,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:31,075 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 117 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:31,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 123 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:38:31,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-20 23:38:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 91. [2021-11-20 23:38:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.65) internal successors, (99), 90 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-11-20 23:38:31,079 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 27 [2021-11-20 23:38:31,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:31,080 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-11-20 23:38:31,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:31,080 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-11-20 23:38:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 23:38:31,081 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:31,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:31,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-20 23:38:31,081 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:31,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:31,082 INFO L85 PathProgramCache]: Analyzing trace with hash 417610599, now seen corresponding path program 1 times [2021-11-20 23:38:31,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:31,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454516764] [2021-11-20 23:38:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:31,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:38:31,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:31,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454516764] [2021-11-20 23:38:31,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454516764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:31,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:31,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:38:31,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616192741] [2021-11-20 23:38:31,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:31,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:38:31,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:38:31,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:38:31,163 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:31,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:31,304 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-11-20 23:38:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:38:31,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 27 [2021-11-20 23:38:31,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:31,305 INFO L225 Difference]: With dead ends: 90 [2021-11-20 23:38:31,305 INFO L226 Difference]: Without dead ends: 90 [2021-11-20 23:38:31,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:38:31,306 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 72 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:31,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 90 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:38:31,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-20 23:38:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-20 23:38:31,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.6333333333333333) internal successors, (98), 89 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2021-11-20 23:38:31,311 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 27 [2021-11-20 23:38:31,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:31,311 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2021-11-20 23:38:31,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:31,311 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2021-11-20 23:38:31,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 23:38:31,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:31,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:38:31,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 23:38:31,314 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:31,314 INFO L85 PathProgramCache]: Analyzing trace with hash 61026715, now seen corresponding path program 1 times [2021-11-20 23:38:31,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:31,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235015363] [2021-11-20 23:38:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:31,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:38:31,398 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:31,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235015363] [2021-11-20 23:38:31,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235015363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:38:31,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:38:31,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:38:31,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729836412] [2021-11-20 23:38:31,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:38:31,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:38:31,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:38:31,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:38:31,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:38:31,401 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:38:31,519 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2021-11-20 23:38:31,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:38:31,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 28 [2021-11-20 23:38:31,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:38:31,520 INFO L225 Difference]: With dead ends: 87 [2021-11-20 23:38:31,520 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 23:38:31,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:38:31,521 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 221 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:38:31,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 60 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:38:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 23:38:31,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-20 23:38:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 86 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-11-20 23:38:31,526 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 28 [2021-11-20 23:38:31,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:38:31,526 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-11-20 23:38:31,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:38:31,527 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2021-11-20 23:38:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 23:38:31,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:38:31,527 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 23:38:31,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-20 23:38:31,528 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 57 more)] === [2021-11-20 23:38:31,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:38:31,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1275737258, now seen corresponding path program 1 times [2021-11-20 23:38:31,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:38:31,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820076043] [2021-11-20 23:38:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:31,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:38:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:32,035 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:38:32,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820076043] [2021-11-20 23:38:32,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820076043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:38:32,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390012915] [2021-11-20 23:38:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:38:32,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:38:32,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:38:32,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:38:32,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85aca922-eb92-4035-9f06-d1603e51e966/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:38:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:38:32,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 23:38:32,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:38:32,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:38:32,329 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:38:32,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 23:38:32,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:38:32,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:32,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 23:38:32,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:32,715 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-11-20 23:38:32,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 43 [2021-11-20 23:38:32,983 INFO L354 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2021-11-20 23:38:32,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 57 [2021-11-20 23:38:33,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:33,204 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-20 23:38:33,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 104 treesize of output 74 [2021-11-20 23:38:33,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:33,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 23:38:33,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:33,374 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-20 23:38:33,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-20 23:38:33,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:33,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:33,451 INFO L354 Elim1Store]: treesize reduction 176, result has 12.0 percent of original size [2021-11-20 23:38:33,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 113 treesize of output 86 [2021-11-20 23:38:33,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:33,730 INFO L354 Elim1Store]: treesize reduction 284, result has 12.9 percent of original size [2021-11-20 23:38:33,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 164 treesize of output 129 [2021-11-20 23:38:33,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:38:33,763 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-20 23:38:33,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 143 [2021-11-20 23:38:33,966 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-20 23:38:33,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 133 [2021-11-20 23:38:34,210 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-11-20 23:38:34,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 125 treesize of output 49 [2021-11-20 23:38:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:38:34,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:38:39,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1187 treesize of output 1175 [2021-11-20 23:41:28,690 INFO L354 Elim1Store]: treesize reduction 934, result has 33.6 percent of original size [2021-11-20 23:41:28,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 17 new quantified variables, introduced 120 case distinctions, treesize of input 3731952779 treesize of output 3715496542