./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8 --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 fc007fddd876ac543d101781e0f5ecf9c7fa16f1 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8 --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 fc007fddd876ac543d101781e0f5ecf9c7fa16f1 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:21:01,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:21:01,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:21:01,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:21:01,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:21:01,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:21:01,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:21:01,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:21:01,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:21:01,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:21:01,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:21:01,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:21:01,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:21:01,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:21:01,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:21:01,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:21:01,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:21:01,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:21:01,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:21:01,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:21:01,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:21:01,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:21:01,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:21:01,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:21:01,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:21:01,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:21:01,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:21:01,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:21:01,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:21:01,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:21:01,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:21:01,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:21:01,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:21:01,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:21:01,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:21:01,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:21:01,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:21:01,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:21:01,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:21:01,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:21:01,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:21:01,472 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:21:01,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:21:01,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:21:01,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:21:01,510 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:21:01,510 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:21:01,510 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:21:01,511 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:21:01,511 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:21:01,511 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:21:01,511 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:21:01,511 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:21:01,512 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:21:01,512 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:21:01,512 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:21:01,512 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:21:01,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:21:01,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:21:01,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:21:01,515 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:21:01,515 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:21:01,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:21:01,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:21:01,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:21:01,516 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:21:01,516 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:21:01,517 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:21:01,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:21:01,517 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:21:01,517 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:21:01,518 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:21:01,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:21:01,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:21:01,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:21:01,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:21:01,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:21:01,519 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:21:01,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:21:01,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:21:01,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:21:01,520 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_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc007fddd876ac543d101781e0f5ecf9c7fa16f1 [2021-10-13 07:21:01,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:21:01,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:21:01,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:21:01,855 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:21:01,856 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:21:01,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-simple/dll2c_append_equal.i [2021-10-13 07:21:01,924 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/data/4f38c43f7/989c240d18134252be70965dc96cca95/FLAGf6bbfadec [2021-10-13 07:21:02,474 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:21:02,475 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/sv-benchmarks/c/list-simple/dll2c_append_equal.i [2021-10-13 07:21:02,497 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/data/4f38c43f7/989c240d18134252be70965dc96cca95/FLAGf6bbfadec [2021-10-13 07:21:02,769 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/data/4f38c43f7/989c240d18134252be70965dc96cca95 [2021-10-13 07:21:02,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:21:02,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:21:02,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:21:02,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:21:02,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:21:02,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:21:02" (1/1) ... [2021-10-13 07:21:02,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a7dd4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:02, skipping insertion in model container [2021-10-13 07:21:02,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:21:02" (1/1) ... [2021-10-13 07:21:02,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:21:02,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:21:03,233 WARN L228 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_49c382a1-6b43-436b-aa98-1199fde7e3ef/sv-benchmarks/c/list-simple/dll2c_append_equal.i[24585,24598] [2021-10-13 07:21:03,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:21:03,244 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:21:03,324 WARN L228 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_49c382a1-6b43-436b-aa98-1199fde7e3ef/sv-benchmarks/c/list-simple/dll2c_append_equal.i[24585,24598] [2021-10-13 07:21:03,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:21:03,367 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:21:03,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:03 WrapperNode [2021-10-13 07:21:03,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:21:03,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:21:03,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:21:03,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:21:03,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:03" (1/1) ... [2021-10-13 07:21:03,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:03" (1/1) ... [2021-10-13 07:21:03,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:21:03,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:21:03,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:21:03,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:21:03,472 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:03" (1/1) ... [2021-10-13 07:21:03,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:03" (1/1) ... [2021-10-13 07:21:03,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:03" (1/1) ... [2021-10-13 07:21:03,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:03" (1/1) ... [2021-10-13 07:21:03,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:03" (1/1) ... [2021-10-13 07:21:03,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:03" (1/1) ... [2021-10-13 07:21:03,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:03" (1/1) ... [2021-10-13 07:21:03,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:21:03,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:21:03,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:21:03,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:21:03,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:03" (1/1) ... [2021-10-13 07:21:03,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:21:03,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:21:03,579 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:21:03,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:21:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:21:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:21:03,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:21:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:21:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:21:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:21:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:21:03,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 07:21:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:21:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:21:03,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:21:04,466 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:21:04,466 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-10-13 07:21:04,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:21:04 BoogieIcfgContainer [2021-10-13 07:21:04,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:21:04,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:21:04,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:21:04,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:21:04,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:21:02" (1/3) ... [2021-10-13 07:21:04,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3760a95c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:21:04, skipping insertion in model container [2021-10-13 07:21:04,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:03" (2/3) ... [2021-10-13 07:21:04,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3760a95c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:21:04, skipping insertion in model container [2021-10-13 07:21:04,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:21:04" (3/3) ... [2021-10-13 07:21:04,481 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_append_equal.i [2021-10-13 07:21:04,493 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:21:04,493 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2021-10-13 07:21:04,549 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:21:04,555 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, mConcurrency=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 [2021-10-13 07:21:04,555 INFO L340 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2021-10-13 07:21:04,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 57 states have (on average 2.473684210526316) internal successors, (141), 129 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:21:04,623 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:04,624 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:21:04,625 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:04,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:04,636 INFO L82 PathProgramCache]: Analyzing trace with hash 253002, now seen corresponding path program 1 times [2021-10-13 07:21:04,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:21:04,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268105563] [2021-10-13 07:21:04,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:04,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:21:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:04,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:04,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:21:04,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268105563] [2021-10-13 07:21:04,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268105563] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:04,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:04,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:21:04,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303622546] [2021-10-13 07:21:04,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:21:04,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:21:04,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:21:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:21:04,899 INFO L87 Difference]: Start difference. First operand has 130 states, 57 states have (on average 2.473684210526316) internal successors, (141), 129 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:05,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:05,105 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2021-10-13 07:21:05,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:21:05,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-10-13 07:21:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:05,120 INFO L225 Difference]: With dead ends: 138 [2021-10-13 07:21:05,121 INFO L226 Difference]: Without dead ends: 134 [2021-10-13 07:21:05,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:21:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-13 07:21:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2021-10-13 07:21:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 54 states have (on average 2.2777777777777777) internal successors, (123), 116 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) [2021-10-13 07:21:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 123 transitions. [2021-10-13 07:21:05,182 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 123 transitions. Word has length 3 [2021-10-13 07:21:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:05,183 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 123 transitions. [2021-10-13 07:21:05,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:05,183 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 123 transitions. [2021-10-13 07:21:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:21:05,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:05,185 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:21:05,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:21:05,186 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:05,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:05,191 INFO L82 PathProgramCache]: Analyzing trace with hash 253003, now seen corresponding path program 1 times [2021-10-13 07:21:05,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:21:05,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708833876] [2021-10-13 07:21:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:05,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:21:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:05,256 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:21:05,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708833876] [2021-10-13 07:21:05,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708833876] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:05,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:05,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:21:05,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431280270] [2021-10-13 07:21:05,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:21:05,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:21:05,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:21:05,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:21:05,260 INFO L87 Difference]: Start difference. First operand 117 states and 123 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:05,361 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2021-10-13 07:21:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:21:05,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-10-13 07:21:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:05,363 INFO L225 Difference]: With dead ends: 108 [2021-10-13 07:21:05,364 INFO L226 Difference]: Without dead ends: 108 [2021-10-13 07:21:05,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:21:05,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-13 07:21:05,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-10-13 07:21:05,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 54 states have (on average 2.111111111111111) internal successors, (114), 107 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) [2021-10-13 07:21:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2021-10-13 07:21:05,373 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 3 [2021-10-13 07:21:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:05,373 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2021-10-13 07:21:05,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2021-10-13 07:21:05,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:21:05,374 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:05,374 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:21:05,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:21:05,375 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:05,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1724125301, now seen corresponding path program 1 times [2021-10-13 07:21:05,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:21:05,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147877326] [2021-10-13 07:21:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:05,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:21:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:05,425 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:21:05,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147877326] [2021-10-13 07:21:05,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147877326] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:05,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:05,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:21:05,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693293115] [2021-10-13 07:21:05,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:21:05,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:21:05,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:21:05,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:21:05,428 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:05,438 INFO L93 Difference]: Finished difference Result 121 states and 128 transitions. [2021-10-13 07:21:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:21:05,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-10-13 07:21:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:05,440 INFO L225 Difference]: With dead ends: 121 [2021-10-13 07:21:05,440 INFO L226 Difference]: Without dead ends: 121 [2021-10-13 07:21:05,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:21:05,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-13 07:21:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2021-10-13 07:21:05,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 55 states have (on average 2.090909090909091) internal successors, (115), 108 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-10-13 07:21:05,448 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 7 [2021-10-13 07:21:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:05,449 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-10-13 07:21:05,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-10-13 07:21:05,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:21:05,450 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:05,450 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:21:05,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:21:05,451 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:05,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:05,451 INFO L82 PathProgramCache]: Analyzing trace with hash -658615246, now seen corresponding path program 1 times [2021-10-13 07:21:05,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:21:05,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144120513] [2021-10-13 07:21:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:05,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:21:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:05,512 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:21:05,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144120513] [2021-10-13 07:21:05,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144120513] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:05,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:05,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:21:05,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917775081] [2021-10-13 07:21:05,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:21:05,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:21:05,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:21:05,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:21:05,516 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2021-10-13 07:21:05,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:05,681 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2021-10-13 07:21:05,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:21:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 [2021-10-13 07:21:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:05,694 INFO L225 Difference]: With dead ends: 129 [2021-10-13 07:21:05,694 INFO L226 Difference]: Without dead ends: 129 [2021-10-13 07:21:05,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:21:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-13 07:21:05,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2021-10-13 07:21:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 55 states have (on average 2.0727272727272728) internal successors, (114), 107 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) [2021-10-13 07:21:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2021-10-13 07:21:05,704 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 11 [2021-10-13 07:21:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:05,705 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2021-10-13 07:21:05,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2021-10-13 07:21:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2021-10-13 07:21:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:21:05,706 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:05,706 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:21:05,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:21:05,706 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:05,707 INFO L82 PathProgramCache]: Analyzing trace with hash -658615245, now seen corresponding path program 1 times [2021-10-13 07:21:05,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:21:05,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440939177] [2021-10-13 07:21:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:05,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:21:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:05,818 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:21:05,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440939177] [2021-10-13 07:21:05,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440939177] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:05,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:05,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:21:05,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831172261] [2021-10-13 07:21:05,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:21:05,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:21:05,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:21:05,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:21:05,832 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2021-10-13 07:21:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:05,961 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-10-13 07:21:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:21:05,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 [2021-10-13 07:21:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:05,964 INFO L225 Difference]: With dead ends: 111 [2021-10-13 07:21:05,964 INFO L226 Difference]: Without dead ends: 111 [2021-10-13 07:21:05,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:21:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-13 07:21:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-10-13 07:21:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 106 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) [2021-10-13 07:21:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2021-10-13 07:21:05,971 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 11 [2021-10-13 07:21:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:05,971 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2021-10-13 07:21:05,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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) [2021-10-13 07:21:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2021-10-13 07:21:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:21:05,972 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:05,972 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:21:05,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 07:21:05,972 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:05,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:05,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1569058093, now seen corresponding path program 1 times [2021-10-13 07:21:05,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:21:05,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012702793] [2021-10-13 07:21:05,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:05,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:21:06,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:06,119 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:21:06,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012702793] [2021-10-13 07:21:06,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012702793] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:06,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:06,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:21:06,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084885434] [2021-10-13 07:21:06,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:21:06,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:21:06,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:21:06,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:21:06,128 INFO L87 Difference]: Start difference. First operand 107 states and 113 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-10-13 07:21:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:06,274 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2021-10-13 07:21:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:21:06,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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 13 [2021-10-13 07:21:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:06,276 INFO L225 Difference]: With dead ends: 133 [2021-10-13 07:21:06,276 INFO L226 Difference]: Without dead ends: 133 [2021-10-13 07:21:06,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:21:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-13 07:21:06,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2021-10-13 07:21:06,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 62 states have (on average 1.967741935483871) internal successors, (122), 113 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2021-10-13 07:21:06,282 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 13 [2021-10-13 07:21:06,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:06,287 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2021-10-13 07:21:06,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-10-13 07:21:06,288 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2021-10-13 07:21:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:21:06,288 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:06,289 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:21:06,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 07:21:06,289 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:06,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:06,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1569058092, now seen corresponding path program 1 times [2021-10-13 07:21:06,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:21:06,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39628425] [2021-10-13 07:21:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:06,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:21:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:06,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:21:06,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39628425] [2021-10-13 07:21:06,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39628425] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:06,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:06,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:21:06,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750333496] [2021-10-13 07:21:06,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:21:06,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:21:06,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:21:06,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:21:06,400 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) 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) [2021-10-13 07:21:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:06,571 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2021-10-13 07:21:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:21:06,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) 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 13 [2021-10-13 07:21:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:06,573 INFO L225 Difference]: With dead ends: 115 [2021-10-13 07:21:06,573 INFO L226 Difference]: Without dead ends: 115 [2021-10-13 07:21:06,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:21:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-13 07:21:06,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-10-13 07:21:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 113 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:06,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2021-10-13 07:21:06,579 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 13 [2021-10-13 07:21:06,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:06,580 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2021-10-13 07:21:06,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) 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) [2021-10-13 07:21:06,580 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2021-10-13 07:21:06,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:21:06,580 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:06,581 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:21:06,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-13 07:21:06,581 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:06,582 INFO L82 PathProgramCache]: Analyzing trace with hash -331144993, now seen corresponding path program 1 times [2021-10-13 07:21:06,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:21:06,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067944369] [2021-10-13 07:21:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:06,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:21:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:06,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:21:06,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067944369] [2021-10-13 07:21:06,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067944369] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:06,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:06,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:21:06,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225509739] [2021-10-13 07:21:06,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:21:06,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:21:06,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:21:06,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:21:06,638 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:06,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:06,703 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2021-10-13 07:21:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:21:06,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2021-10-13 07:21:06,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:06,705 INFO L225 Difference]: With dead ends: 115 [2021-10-13 07:21:06,705 INFO L226 Difference]: Without dead ends: 115 [2021-10-13 07:21:06,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:21:06,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-13 07:21:06,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-10-13 07:21:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 62 states have (on average 1.935483870967742) internal successors, (120), 113 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) [2021-10-13 07:21:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2021-10-13 07:21:06,716 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 15 [2021-10-13 07:21:06,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:06,716 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2021-10-13 07:21:06,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2021-10-13 07:21:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:21:06,717 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:06,718 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:21:06,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 07:21:06,718 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:06,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:06,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1680528680, now seen corresponding path program 1 times [2021-10-13 07:21:06,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:21:06,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014487485] [2021-10-13 07:21:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:06,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:21:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:06,792 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:21:06,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014487485] [2021-10-13 07:21:06,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014487485] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:21:06,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903658299] [2021-10-13 07:21:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:06,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:21:06,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:21:06,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:21:06,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:21:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:06,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:21:06,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:21:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:07,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:21:07,129 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 07:21:07,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-10-13 07:21:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:07,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903658299] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:21:07,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2072980885] [2021-10-13 07:21:07,224 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-10-13 07:21:07,225 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:21:07,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:21:07,237 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:21:07,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:21:07,283 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:07,288 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:21:07,289 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:07,291 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-10-13 07:21:07,292 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:21:07,293 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:07,293 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-13 07:21:07,297 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 188 [2021-10-13 07:21:07,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:07,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:07,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:07,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:07,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:07,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:21:07,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-10-13 07:21:07,337 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:07,338 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-13 07:21:07,341 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:07,345 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-13 07:21:07,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:21:07,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:21:07,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:07,379 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:21:07,386 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 190 [2021-10-13 07:21:07,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:21:07,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:185, output treesize:190 [2021-10-13 07:21:07,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:21:07,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-13 07:21:07,616 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_131| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:21:07,619 INFO L168 Benchmark]: Toolchain (without parser) took 4845.29 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 76.7 MB in the beginning and 61.9 MB in the end (delta: 14.8 MB). Peak memory consumption was 37.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:21:07,619 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 113.2 MB. Free memory was 94.5 MB in the beginning and 94.4 MB in the end (delta: 55.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:21:07,620 INFO L168 Benchmark]: CACSL2BoogieTranslator took 592.69 ms. Allocated memory is still 113.2 MB. Free memory was 76.5 MB in the beginning and 83.6 MB in the end (delta: -7.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:21:07,620 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.05 ms. Allocated memory is still 113.2 MB. Free memory was 83.6 MB in the beginning and 81.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:21:07,620 INFO L168 Benchmark]: Boogie Preprocessor took 83.80 ms. Allocated memory is still 113.2 MB. Free memory was 81.2 MB in the beginning and 79.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:21:07,621 INFO L168 Benchmark]: RCFGBuilder took 923.53 ms. Allocated memory is still 113.2 MB. Free memory was 79.1 MB in the beginning and 49.0 MB in the end (delta: 30.1 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:21:07,621 INFO L168 Benchmark]: TraceAbstraction took 3145.14 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 48.6 MB in the beginning and 61.9 MB in the end (delta: -13.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:21:07,623 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 113.2 MB. Free memory was 94.5 MB in the beginning and 94.4 MB in the end (delta: 55.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 592.69 ms. Allocated memory is still 113.2 MB. Free memory was 76.5 MB in the beginning and 83.6 MB in the end (delta: -7.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 92.05 ms. Allocated memory is still 113.2 MB. Free memory was 83.6 MB in the beginning and 81.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 83.80 ms. Allocated memory is still 113.2 MB. Free memory was 81.2 MB in the beginning and 79.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 923.53 ms. Allocated memory is still 113.2 MB. Free memory was 79.1 MB in the beginning and 49.0 MB in the end (delta: 30.1 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3145.14 ms. Allocated memory was 113.2 MB in the beginning and 136.3 MB in the end (delta: 23.1 MB). Free memory was 48.6 MB in the beginning and 61.9 MB in the end (delta: -13.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_131| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_131|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:21:07,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:21:10,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:21:10,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:21:10,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:21:10,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:21:10,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:21:10,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:21:10,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:21:10,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:21:10,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:21:10,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:21:10,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:21:10,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:21:10,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:21:10,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:21:10,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:21:10,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:21:10,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:21:10,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:21:10,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:21:10,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:21:10,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:21:10,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:21:10,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:21:10,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:21:10,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:21:10,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:21:10,312 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:21:10,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:21:10,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:21:10,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:21:10,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:21:10,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:21:10,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:21:10,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:21:10,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:21:10,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:21:10,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:21:10,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:21:10,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:21:10,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:21:10,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 07:21:10,350 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:21:10,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:21:10,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:21:10,352 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:21:10,352 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:21:10,352 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:21:10,352 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:21:10,353 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:21:10,353 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:21:10,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:21:10,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:21:10,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:21:10,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:21:10,355 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:21:10,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:21:10,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:21:10,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:21:10,355 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:21:10,355 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:21:10,356 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:21:10,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:21:10,356 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:21:10,356 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:21:10,356 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:21:10,357 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:21:10,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:21:10,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:21:10,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:21:10,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:21:10,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:21:10,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:21:10,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:21:10,358 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:21:10,358 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:21:10,358 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:21:10,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:21:10,359 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc007fddd876ac543d101781e0f5ecf9c7fa16f1 [2021-10-13 07:21:10,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:21:10,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:21:10,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:21:10,775 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:21:10,776 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:21:10,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-simple/dll2c_append_equal.i [2021-10-13 07:21:10,847 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/data/3dc49aa8b/26f9790985e546bba3ddd460453297cf/FLAGb4f5a1cec [2021-10-13 07:21:11,382 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:21:11,383 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/sv-benchmarks/c/list-simple/dll2c_append_equal.i [2021-10-13 07:21:11,402 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/data/3dc49aa8b/26f9790985e546bba3ddd460453297cf/FLAGb4f5a1cec [2021-10-13 07:21:11,694 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/data/3dc49aa8b/26f9790985e546bba3ddd460453297cf [2021-10-13 07:21:11,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:21:11,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:21:11,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:21:11,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:21:11,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:21:11,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:21:11" (1/1) ... [2021-10-13 07:21:11,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b4e36ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:11, skipping insertion in model container [2021-10-13 07:21:11,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:21:11" (1/1) ... [2021-10-13 07:21:11,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:21:11,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:21:12,145 WARN L228 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_49c382a1-6b43-436b-aa98-1199fde7e3ef/sv-benchmarks/c/list-simple/dll2c_append_equal.i[24585,24598] [2021-10-13 07:21:12,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:21:12,170 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:21:12,239 WARN L228 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_49c382a1-6b43-436b-aa98-1199fde7e3ef/sv-benchmarks/c/list-simple/dll2c_append_equal.i[24585,24598] [2021-10-13 07:21:12,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:21:12,276 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:21:12,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:12 WrapperNode [2021-10-13 07:21:12,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:21:12,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:21:12,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:21:12,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:21:12,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:12" (1/1) ... [2021-10-13 07:21:12,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:12" (1/1) ... [2021-10-13 07:21:12,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:21:12,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:21:12,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:21:12,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:21:12,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:12" (1/1) ... [2021-10-13 07:21:12,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:12" (1/1) ... [2021-10-13 07:21:12,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:12" (1/1) ... [2021-10-13 07:21:12,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:12" (1/1) ... [2021-10-13 07:21:12,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:12" (1/1) ... [2021-10-13 07:21:12,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:12" (1/1) ... [2021-10-13 07:21:12,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:12" (1/1) ... [2021-10-13 07:21:12,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:21:12,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:21:12,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:21:12,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:21:12,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:12" (1/1) ... [2021-10-13 07:21:12,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:21:12,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:21:12,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:21:12,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:21:12,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:21:12,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:21:12,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:21:12,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:21:12,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:21:12,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:21:12,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:21:12,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 07:21:12,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:21:12,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:21:12,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:21:13,474 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:21:13,474 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-10-13 07:21:13,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:21:13 BoogieIcfgContainer [2021-10-13 07:21:13,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:21:13,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:21:13,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:21:13,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:21:13,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:21:11" (1/3) ... [2021-10-13 07:21:13,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@898094f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:21:13, skipping insertion in model container [2021-10-13 07:21:13,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:21:12" (2/3) ... [2021-10-13 07:21:13,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@898094f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:21:13, skipping insertion in model container [2021-10-13 07:21:13,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:21:13" (3/3) ... [2021-10-13 07:21:13,485 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_append_equal.i [2021-10-13 07:21:13,491 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:21:13,491 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2021-10-13 07:21:13,537 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:21:13,543 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, mConcurrency=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 [2021-10-13 07:21:13,543 INFO L340 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2021-10-13 07:21:13,562 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 147 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:13,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:21:13,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:13,569 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:21:13,569 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:13,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:13,575 INFO L82 PathProgramCache]: Analyzing trace with hash 925702, now seen corresponding path program 1 times [2021-10-13 07:21:13,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:21:13,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551141331] [2021-10-13 07:21:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:13,589 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:21:13,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:21:13,605 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:21:13,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:21:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:13,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:21:13,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:21:13,819 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:21:13,820 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-13 07:21:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:13,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:21:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:13,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:21:13,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551141331] [2021-10-13 07:21:13,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551141331] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:13,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:13,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:21:13,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701747319] [2021-10-13 07:21:13,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:21:13,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:21:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:21:13,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:21:13,910 INFO L87 Difference]: Start difference. First operand has 148 states, 75 states have (on average 2.1466666666666665) internal successors, (161), 147 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 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) [2021-10-13 07:21:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:14,395 INFO L93 Difference]: Finished difference Result 157 states and 167 transitions. [2021-10-13 07:21:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:21:14,396 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 [2021-10-13 07:21:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:14,405 INFO L225 Difference]: With dead ends: 157 [2021-10-13 07:21:14,405 INFO L226 Difference]: Without dead ends: 152 [2021-10-13 07:21:14,406 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:21:14,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-13 07:21:14,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 134. [2021-10-13 07:21:14,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 71 states have (on average 1.971830985915493) internal successors, (140), 133 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:14,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 140 transitions. [2021-10-13 07:21:14,447 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 140 transitions. Word has length 4 [2021-10-13 07:21:14,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:14,448 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 140 transitions. [2021-10-13 07:21:14,448 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) [2021-10-13 07:21:14,448 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 140 transitions. [2021-10-13 07:21:14,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:21:14,449 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:14,449 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:21:14,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:21:14,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:21:14,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:14,657 INFO L82 PathProgramCache]: Analyzing trace with hash 925703, now seen corresponding path program 1 times [2021-10-13 07:21:14,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:21:14,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286193966] [2021-10-13 07:21:14,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:14,658 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:21:14,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:21:14,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:21:14,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:21:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:14,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:21:14,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:21:14,763 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:21:14,764 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-13 07:21:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:14,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:21:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:14,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:21:14,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286193966] [2021-10-13 07:21:14,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286193966] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:14,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:14,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:21:14,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847860262] [2021-10-13 07:21:14,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:21:14,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:21:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:21:14,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:21:14,932 INFO L87 Difference]: Start difference. First operand 134 states and 140 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:15,337 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2021-10-13 07:21:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:21:15,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 [2021-10-13 07:21:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:15,340 INFO L225 Difference]: With dead ends: 125 [2021-10-13 07:21:15,340 INFO L226 Difference]: Without dead ends: 125 [2021-10-13 07:21:15,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:21:15,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-13 07:21:15,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-10-13 07:21:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 71 states have (on average 1.8450704225352113) internal successors, (131), 124 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 131 transitions. [2021-10-13 07:21:15,353 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 131 transitions. Word has length 4 [2021-10-13 07:21:15,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:15,353 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 131 transitions. [2021-10-13 07:21:15,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 131 transitions. [2021-10-13 07:21:15,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:21:15,354 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:15,355 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:21:15,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:21:15,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:21:15,566 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:15,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:15,567 INFO L82 PathProgramCache]: Analyzing trace with hash 613332465, now seen corresponding path program 1 times [2021-10-13 07:21:15,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:21:15,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093728346] [2021-10-13 07:21:15,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:15,569 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:21:15,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:21:15,570 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:21:15,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:21:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:15,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:21:15,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:21:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:15,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:21:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:15,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:21:15,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093728346] [2021-10-13 07:21:15,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093728346] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:15,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:15,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:21:15,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017421093] [2021-10-13 07:21:15,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:21:15,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:21:15,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:21:15,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:21:15,764 INFO L87 Difference]: Start difference. First operand 125 states and 131 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:15,783 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2021-10-13 07:21:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:21:15,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 10 [2021-10-13 07:21:15,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:15,794 INFO L225 Difference]: With dead ends: 140 [2021-10-13 07:21:15,794 INFO L226 Difference]: Without dead ends: 140 [2021-10-13 07:21:15,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:21:15,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-13 07:21:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 126. [2021-10-13 07:21:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 72 states have (on average 1.8333333333333333) internal successors, (132), 125 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2021-10-13 07:21:15,811 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 10 [2021-10-13 07:21:15,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:15,815 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2021-10-13 07:21:15,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2021-10-13 07:21:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:21:15,816 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:15,816 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:21:15,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:21:16,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:21:16,017 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:16,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:16,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1103137848, now seen corresponding path program 1 times [2021-10-13 07:21:16,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:21:16,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111658373] [2021-10-13 07:21:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:16,019 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:21:16,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:21:16,020 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:21:16,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:21:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:16,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:21:16,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:21:16,163 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 [2021-10-13 07:21:16,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:16,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:21:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:16,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:21:16,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111658373] [2021-10-13 07:21:16,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111658373] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:16,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:16,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 07:21:16,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167770636] [2021-10-13 07:21:16,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:21:16,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:21:16,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:21:16,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:21:16,275 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:16,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:16,823 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2021-10-13 07:21:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:21:16,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-10-13 07:21:16,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:16,826 INFO L225 Difference]: With dead ends: 149 [2021-10-13 07:21:16,826 INFO L226 Difference]: Without dead ends: 149 [2021-10-13 07:21:16,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:21:16,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-13 07:21:16,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 125. [2021-10-13 07:21:16,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 72 states have (on average 1.8194444444444444) internal successors, (131), 124 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 131 transitions. [2021-10-13 07:21:16,835 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 131 transitions. Word has length 16 [2021-10-13 07:21:16,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:16,836 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 131 transitions. [2021-10-13 07:21:16,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 131 transitions. [2021-10-13 07:21:16,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 07:21:16,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:16,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:21:16,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:21:17,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:21:17,057 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:17,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1103137849, now seen corresponding path program 1 times [2021-10-13 07:21:17,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:21:17,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525538985] [2021-10-13 07:21:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:17,059 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:21:17,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:21:17,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:21:17,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:21:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:17,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:21:17,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:21:17,211 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 [2021-10-13 07:21:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:17,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:21:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:17,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:21:17,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525538985] [2021-10-13 07:21:17,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525538985] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:17,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:17,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 07:21:17,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562242937] [2021-10-13 07:21:17,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:21:17,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:21:17,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:21:17,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:21:17,591 INFO L87 Difference]: Start difference. First operand 125 states and 131 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) 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) [2021-10-13 07:21:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:18,283 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2021-10-13 07:21:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:21:18,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) 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 16 [2021-10-13 07:21:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:18,285 INFO L225 Difference]: With dead ends: 130 [2021-10-13 07:21:18,285 INFO L226 Difference]: Without dead ends: 130 [2021-10-13 07:21:18,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:21:18,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-13 07:21:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2021-10-13 07:21:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.8055555555555556) internal successors, (130), 123 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2021-10-13 07:21:18,293 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 16 [2021-10-13 07:21:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:18,293 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2021-10-13 07:21:18,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) 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) [2021-10-13 07:21:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2021-10-13 07:21:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:21:18,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:18,294 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:21:18,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:21:18,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:21:18,499 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:18,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:18,499 INFO L82 PathProgramCache]: Analyzing trace with hash -741449383, now seen corresponding path program 1 times [2021-10-13 07:21:18,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:21:18,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287274380] [2021-10-13 07:21:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:18,500 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:21:18,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:21:18,501 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:21:18,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:21:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:18,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:21:18,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:21:18,660 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:21:18,661 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 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-13 07:21:18,768 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:21:18,768 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 25 treesize of output 32 [2021-10-13 07:21:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:19,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:21:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:33,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:21:33,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287274380] [2021-10-13 07:21:33,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287274380] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:33,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:33,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 07:21:33,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841484340] [2021-10-13 07:21:33,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:21:33,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:21:33,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:21:33,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=48, Unknown=4, NotChecked=0, Total=72 [2021-10-13 07:21:33,424 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:34,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:21:34,279 INFO L93 Difference]: Finished difference Result 154 states and 162 transitions. [2021-10-13 07:21:34,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:21:34,280 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 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 18 [2021-10-13 07:21:34,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:21:34,282 INFO L225 Difference]: With dead ends: 154 [2021-10-13 07:21:34,282 INFO L226 Difference]: Without dead ends: 154 [2021-10-13 07:21:34,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 14218.2ms TimeCoverageRelationStatistics Valid=54, Invalid=98, Unknown=4, NotChecked=0, Total=156 [2021-10-13 07:21:34,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-13 07:21:34,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-10-13 07:21:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.7407407407407407) internal successors, (141), 132 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:34,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2021-10-13 07:21:34,289 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 18 [2021-10-13 07:21:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:21:34,289 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2021-10-13 07:21:34,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:21:34,290 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2021-10-13 07:21:34,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:21:34,290 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:21:34,291 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:21:34,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:21:34,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:21:34,492 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:21:34,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:21:34,492 INFO L82 PathProgramCache]: Analyzing trace with hash -741449382, now seen corresponding path program 1 times [2021-10-13 07:21:34,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:21:34,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163143892] [2021-10-13 07:21:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:21:34,493 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:21:34,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:21:34,494 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:21:34,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 07:21:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:21:34,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:21:34,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:21:34,744 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 07:21:34,745 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 1 case distinctions, treesize of input 19 treesize of output 24 [2021-10-13 07:21:34,768 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:21:34,768 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 1 case distinctions, treesize of input 24 treesize of output 28 [2021-10-13 07:21:34,954 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:21:34,954 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 29 treesize of output 31 [2021-10-13 07:21:34,975 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:21:34,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-13 07:21:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:35,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:21:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:38,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:21:38,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163143892] [2021-10-13 07:21:38,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163143892] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:21:38,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:21:38,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-13 07:21:38,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348206701] [2021-10-13 07:21:38,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:21:38,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:21:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:21:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-10-13 07:21:38,547 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:02,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:02,841 INFO L93 Difference]: Finished difference Result 173 states and 181 transitions. [2021-10-13 07:22:02,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:22:02,842 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 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 18 [2021-10-13 07:22:02,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:02,844 INFO L225 Difference]: With dead ends: 173 [2021-10-13 07:22:02,844 INFO L226 Difference]: Without dead ends: 173 [2021-10-13 07:22:02,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 13367.9ms TimeCoverageRelationStatistics Valid=89, Invalid=182, Unknown=1, NotChecked=0, Total=272 [2021-10-13 07:22:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-13 07:22:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 133. [2021-10-13 07:22:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.728395061728395) internal successors, (140), 132 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 140 transitions. [2021-10-13 07:22:02,851 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 140 transitions. Word has length 18 [2021-10-13 07:22:02,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:02,852 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 140 transitions. [2021-10-13 07:22:02,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 140 transitions. [2021-10-13 07:22:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 07:22:02,853 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:02,853 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:02,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:03,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:22:03,054 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:22:03,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:03,054 INFO L82 PathProgramCache]: Analyzing trace with hash 431868768, now seen corresponding path program 1 times [2021-10-13 07:22:03,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:03,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16364916] [2021-10-13 07:22:03,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:03,055 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:03,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:03,057 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:03,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:22:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:22:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:03,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:03,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:03,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16364916] [2021-10-13 07:22:03,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16364916] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:22:03,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:22:03,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-13 07:22:03,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144428569] [2021-10-13 07:22:03,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:22:03,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:22:03,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:22:03,493 INFO L87 Difference]: Start difference. First operand 133 states and 140 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2021-10-13 07:22:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:03,865 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2021-10-13 07:22:03,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:22:03,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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 20 [2021-10-13 07:22:03,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:03,867 INFO L225 Difference]: With dead ends: 134 [2021-10-13 07:22:03,867 INFO L226 Difference]: Without dead ends: 134 [2021-10-13 07:22:03,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:22:03,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-13 07:22:03,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-10-13 07:22:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.7160493827160495) internal successors, (139), 132 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:03,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 139 transitions. [2021-10-13 07:22:03,873 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 139 transitions. Word has length 20 [2021-10-13 07:22:03,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:03,873 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 139 transitions. [2021-10-13 07:22:03,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2021-10-13 07:22:03,874 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 139 transitions. [2021-10-13 07:22:03,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:22:03,875 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:03,875 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:03,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:04,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:22:04,079 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:22:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:04,080 INFO L82 PathProgramCache]: Analyzing trace with hash 498265101, now seen corresponding path program 1 times [2021-10-13 07:22:04,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:04,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286735751] [2021-10-13 07:22:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:04,081 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:04,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:04,082 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:04,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:22:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:04,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:22:04,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:04,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:04,471 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 07:22:04,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:22:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:04,560 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:04,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286735751] [2021-10-13 07:22:04,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286735751] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:04,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [384224204] [2021-10-13 07:22:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:04,560 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:22:04,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:22:04,565 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:22:04,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 07:22:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:04,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:22:04,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:04,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2021-10-13 07:22:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:04,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:04,980 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 07:22:04,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:22:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:05,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [384224204] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:05,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940815198] [2021-10-13 07:22:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:05,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:22:05,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:22:05,068 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:22:05,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 07:22:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:05,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:22:05,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:05,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:05,438 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-13 07:22:05,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:22:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:05,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940815198] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:05,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:22:05,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2021-10-13 07:22:05,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138445720] [2021-10-13 07:22:05,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:22:05,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:05,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:22:05,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:22:05,521 INFO L87 Difference]: Start difference. First operand 133 states and 139 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) [2021-10-13 07:22:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:06,121 INFO L93 Difference]: Finished difference Result 151 states and 158 transitions. [2021-10-13 07:22:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:22:06,121 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 21 [2021-10-13 07:22:06,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:06,122 INFO L225 Difference]: With dead ends: 151 [2021-10-13 07:22:06,123 INFO L226 Difference]: Without dead ends: 151 [2021-10-13 07:22:06,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:22:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-13 07:22:06,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 132. [2021-10-13 07:22:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 81 states have (on average 1.7037037037037037) internal successors, (138), 131 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2021-10-13 07:22:06,128 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 21 [2021-10-13 07:22:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:06,129 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2021-10-13 07:22:06,129 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) [2021-10-13 07:22:06,129 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2021-10-13 07:22:06,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:22:06,130 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:06,130 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:06,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-10-13 07:22:06,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:06,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:06,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:22:06,734 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:22:06,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:06,734 INFO L82 PathProgramCache]: Analyzing trace with hash 498265102, now seen corresponding path program 1 times [2021-10-13 07:22:06,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:06,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082656749] [2021-10-13 07:22:06,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:06,735 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:06,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:06,735 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:06,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 07:22:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:06,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:22:06,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:07,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:07,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:22:07,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-10-13 07:22:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:08,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:08,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082656749] [2021-10-13 07:22:08,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082656749] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:08,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1519850069] [2021-10-13 07:22:08,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:08,284 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:22:08,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:22:08,290 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:22:08,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-13 07:22:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:08,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:22:08,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:08,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:09,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:22:09,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-10-13 07:22:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:09,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1519850069] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:09,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815425484] [2021-10-13 07:22:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:09,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:22:09,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:22:09,492 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:22:09,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 07:22:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:09,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:22:09,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:10,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:10,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:22:10,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-10-13 07:22:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:10,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815425484] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:22:10,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:22:10,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-10-13 07:22:10,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680416016] [2021-10-13 07:22:10,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:22:10,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:10,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:22:10,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:22:10,594 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:11,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:11,924 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2021-10-13 07:22:11,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:22:11,927 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 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 21 [2021-10-13 07:22:11,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:11,928 INFO L225 Difference]: With dead ends: 132 [2021-10-13 07:22:11,928 INFO L226 Difference]: Without dead ends: 132 [2021-10-13 07:22:11,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 566.7ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:22:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-13 07:22:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-10-13 07:22:11,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 81 states have (on average 1.691358024691358) internal successors, (137), 130 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:11,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 137 transitions. [2021-10-13 07:22:11,933 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 137 transitions. Word has length 21 [2021-10-13 07:22:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:11,934 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 137 transitions. [2021-10-13 07:22:11,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:11,935 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 137 transitions. [2021-10-13 07:22:11,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:22:11,935 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:11,936 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:11,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-13 07:22:12,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:12,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-13 07:22:12,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:22:12,540 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:22:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:12,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1733651014, now seen corresponding path program 1 times [2021-10-13 07:22:12,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:12,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012215958] [2021-10-13 07:22:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:12,541 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:12,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:12,542 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:12,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 07:22:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:12,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:22:12,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:12,912 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 [2021-10-13 07:22:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:13,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:13,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:13,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012215958] [2021-10-13 07:22:13,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012215958] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:22:13,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:22:13,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-13 07:22:13,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170974825] [2021-10-13 07:22:13,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:22:13,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:13,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:22:13,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:22:13,177 INFO L87 Difference]: Start difference. First operand 131 states and 137 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 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) [2021-10-13 07:22:14,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:14,081 INFO L93 Difference]: Finished difference Result 147 states and 154 transitions. [2021-10-13 07:22:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:22:14,081 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 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 22 [2021-10-13 07:22:14,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:14,082 INFO L225 Difference]: With dead ends: 147 [2021-10-13 07:22:14,082 INFO L226 Difference]: Without dead ends: 147 [2021-10-13 07:22:14,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:22:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-13 07:22:14,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 129. [2021-10-13 07:22:14,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.6666666666666667) internal successors, (135), 128 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2021-10-13 07:22:14,087 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 22 [2021-10-13 07:22:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:14,087 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2021-10-13 07:22:14,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 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) [2021-10-13 07:22:14,088 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2021-10-13 07:22:14,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 07:22:14,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:14,089 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:14,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:14,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:22:14,299 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:22:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1733651013, now seen corresponding path program 1 times [2021-10-13 07:22:14,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:14,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988619728] [2021-10-13 07:22:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:14,300 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:14,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:14,302 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:14,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:22:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:14,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:22:14,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:14,637 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 [2021-10-13 07:22:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:14,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:15,458 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:15,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988619728] [2021-10-13 07:22:15,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988619728] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:22:15,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:22:15,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-13 07:22:15,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117437731] [2021-10-13 07:22:15,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:22:15,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:22:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:22:15,460 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:16,627 INFO L93 Difference]: Finished difference Result 127 states and 133 transitions. [2021-10-13 07:22:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:22:16,628 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-10-13 07:22:16,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:16,629 INFO L225 Difference]: With dead ends: 127 [2021-10-13 07:22:16,629 INFO L226 Difference]: Without dead ends: 127 [2021-10-13 07:22:16,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 549.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:22:16,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-13 07:22:16,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2021-10-13 07:22:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.65) internal successors, (132), 125 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2021-10-13 07:22:16,633 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 22 [2021-10-13 07:22:16,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:16,634 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2021-10-13 07:22:16,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:16,634 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2021-10-13 07:22:16,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 07:22:16,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:16,636 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:16,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:16,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:22:16,849 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:22:16,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:16,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1584590306, now seen corresponding path program 1 times [2021-10-13 07:22:16,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:16,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097944366] [2021-10-13 07:22:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:16,850 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:16,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:16,851 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:16,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 07:22:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:17,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:22:17,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:17,353 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:22:17,353 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-13 07:22:17,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 20 treesize of output 18 [2021-10-13 07:22:17,669 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-13 07:22:17,670 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 [2021-10-13 07:22:18,775 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-13 07:22:18,775 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 32 [2021-10-13 07:22:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:19,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:20,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:20,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097944366] [2021-10-13 07:22:20,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097944366] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:22:20,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:22:20,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-13 07:22:20,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406922895] [2021-10-13 07:22:20,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:22:20,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:20,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:22:20,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:22:20,792 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:22,681 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2021-10-13 07:22:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:22:22,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-10-13 07:22:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:22,687 INFO L225 Difference]: With dead ends: 118 [2021-10-13 07:22:22,688 INFO L226 Difference]: Without dead ends: 118 [2021-10-13 07:22:22,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 609.3ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:22:22,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-13 07:22:22,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-10-13 07:22:22,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 80 states have (on average 1.55) internal successors, (124), 117 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:22,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2021-10-13 07:22:22,692 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 31 [2021-10-13 07:22:22,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:22,693 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2021-10-13 07:22:22,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:22,694 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2021-10-13 07:22:22,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 07:22:22,699 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:22,699 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:22,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:22,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:22:22,911 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:22:22,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:22,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1584590307, now seen corresponding path program 1 times [2021-10-13 07:22:22,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:22,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595003451] [2021-10-13 07:22:22,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:22,912 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:22,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:22,913 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:22,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 07:22:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:23,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:22:23,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:23,410 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:22:23,411 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 20 treesize of output 22 [2021-10-13 07:22:23,729 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 07:22:23,729 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 35 treesize of output 46 [2021-10-13 07:22:24,875 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-13 07:22:24,876 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 39 treesize of output 50 [2021-10-13 07:22:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:25,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:26,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:26,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595003451] [2021-10-13 07:22:26,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595003451] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:22:26,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:22:26,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-10-13 07:22:26,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182023957] [2021-10-13 07:22:26,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:22:26,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:26,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:22:26,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:22:26,056 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:26,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:26,964 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2021-10-13 07:22:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:22:26,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 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 31 [2021-10-13 07:22:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:26,967 INFO L225 Difference]: With dead ends: 128 [2021-10-13 07:22:26,967 INFO L226 Difference]: Without dead ends: 128 [2021-10-13 07:22:26,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 341.7ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:22:26,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-13 07:22:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 110. [2021-10-13 07:22:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 80 states have (on average 1.45) internal successors, (116), 109 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2021-10-13 07:22:26,971 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 31 [2021-10-13 07:22:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:26,971 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2021-10-13 07:22:26,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2021-10-13 07:22:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 07:22:26,972 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:26,973 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:26,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:27,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:22:27,179 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:22:27,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:27,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1922107262, now seen corresponding path program 1 times [2021-10-13 07:22:27,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:27,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172782978] [2021-10-13 07:22:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:27,180 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:27,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:27,181 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:27,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 07:22:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:27,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:22:27,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:27,733 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 [2021-10-13 07:22:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:22:27,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:22:27,950 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:27,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172782978] [2021-10-13 07:22:27,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172782978] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:22:27,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:22:27,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-13 07:22:27,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27936882] [2021-10-13 07:22:27,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:22:27,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:27,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:22:27,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:22:27,952 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:28,587 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-10-13 07:22:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:22:28,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2021-10-13 07:22:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:28,588 INFO L225 Difference]: With dead ends: 124 [2021-10-13 07:22:28,588 INFO L226 Difference]: Without dead ends: 124 [2021-10-13 07:22:28,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:22:28,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-13 07:22:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 106. [2021-10-13 07:22:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 80 states have (on average 1.4) internal successors, (112), 105 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2021-10-13 07:22:28,593 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 33 [2021-10-13 07:22:28,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:28,593 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2021-10-13 07:22:28,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2021-10-13 07:22:28,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 07:22:28,595 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:28,595 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:28,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-10-13 07:22:28,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:22:28,807 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:22:28,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:28,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1922107263, now seen corresponding path program 1 times [2021-10-13 07:22:28,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:28,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132773972] [2021-10-13 07:22:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:28,809 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:28,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:28,809 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:28,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 07:22:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:29,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:22:29,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:29,331 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 [2021-10-13 07:22:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:22:29,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:22:29,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:29,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132773972] [2021-10-13 07:22:29,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132773972] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:22:29,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:22:29,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-13 07:22:29,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430019093] [2021-10-13 07:22:29,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:22:29,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:22:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:22:29,802 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:22:30,498 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2021-10-13 07:22:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:22:30,499 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 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 33 [2021-10-13 07:22:30,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:22:30,500 INFO L225 Difference]: With dead ends: 102 [2021-10-13 07:22:30,501 INFO L226 Difference]: Without dead ends: 102 [2021-10-13 07:22:30,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:22:30,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-13 07:22:30,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-10-13 07:22:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.35) internal successors, (108), 101 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2021-10-13 07:22:30,505 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 33 [2021-10-13 07:22:30,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:22:30,505 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2021-10-13 07:22:30,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:22:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2021-10-13 07:22:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 07:22:30,506 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:22:30,506 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:22:30,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:22:30,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:22:30,715 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:22:30,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:22:30,716 INFO L82 PathProgramCache]: Analyzing trace with hash -544206026, now seen corresponding path program 1 times [2021-10-13 07:22:30,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:22:30,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405714742] [2021-10-13 07:22:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:22:30,716 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:22:30,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:22:30,718 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:22:30,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-13 07:22:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:22:31,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:22:31,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:22:31,335 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 [2021-10-13 07:22:31,694 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-10-13 07:22:31,695 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 30 treesize of output 41 [2021-10-13 07:22:31,947 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 07:22:31,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 49 treesize of output 52 [2021-10-13 07:22:32,403 INFO L354 Elim1Store]: treesize reduction 50, result has 33.3 percent of original size [2021-10-13 07:22:32,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 69 treesize of output 81 [2021-10-13 07:22:33,259 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-10-13 07:22:33,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 97 [2021-10-13 07:22:35,789 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 07:22:35,790 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 81 treesize of output 59 [2021-10-13 07:22:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:35,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:22:36,173 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:22:36,175 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-10-13 07:22:45,775 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 615 treesize of output 603 [2021-10-13 07:22:51,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:22:51,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 93 treesize of output 111 [2021-10-13 07:22:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:22:51,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:22:51,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405714742] [2021-10-13 07:22:51,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405714742] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 07:22:51,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 07:22:51,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 23 [2021-10-13 07:22:51,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182091015] [2021-10-13 07:22:51,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 07:22:51,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:22:51,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 07:22:51,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=468, Unknown=4, NotChecked=0, Total=552 [2021-10-13 07:22:51,286 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:23:05,588 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2021-10-13 07:23:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 07:23:05,588 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-10-13 07:23:05,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:23:05,589 INFO L225 Difference]: With dead ends: 119 [2021-10-13 07:23:05,589 INFO L226 Difference]: Without dead ends: 119 [2021-10-13 07:23:05,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 14843.6ms TimeCoverageRelationStatistics Valid=311, Invalid=945, Unknown=4, NotChecked=0, Total=1260 [2021-10-13 07:23:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-13 07:23:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2021-10-13 07:23:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 80 states have (on average 1.3375) internal successors, (107), 100 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2021-10-13 07:23:05,593 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 34 [2021-10-13 07:23:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:23:05,593 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2021-10-13 07:23:05,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:23:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2021-10-13 07:23:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 07:23:05,594 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:23:05,595 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:23:05,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-13 07:23:05,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:23:05,803 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 68 more)] === [2021-10-13 07:23:05,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:23:05,804 INFO L82 PathProgramCache]: Analyzing trace with hash -544206025, now seen corresponding path program 1 times [2021-10-13 07:23:05,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:23:05,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630143561] [2021-10-13 07:23:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:05,805 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:23:05,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:23:05,806 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:23:05,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 07:23:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:06,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 07:23:06,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:06,587 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 [2021-10-13 07:23:06,601 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 [2021-10-13 07:23:07,338 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-13 07:23:07,339 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 16 treesize of output 18 [2021-10-13 07:23:07,378 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:23:07,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-10-13 07:23:07,614 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:23:07,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 18 [2021-10-13 07:23:07,691 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 07:23:07,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 32 [2021-10-13 07:23:07,943 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-13 07:23:07,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 28 treesize of output 30 [2021-10-13 07:23:07,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:23:08,068 INFO L354 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2021-10-13 07:23:08,069 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 2 case distinctions, treesize of input 45 treesize of output 57 [2021-10-13 07:23:08,569 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-10-13 07:23:08,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 112 [2021-10-13 07:23:08,680 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-10-13 07:23:08,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 93 [2021-10-13 07:23:12,146 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 07:23:12,147 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 82 treesize of output 60 [2021-10-13 07:23:12,173 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 07:23:12,174 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 51 treesize of output 33 [2021-10-13 07:23:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:12,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:12,649 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:12,650 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-13 07:23:12,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:12,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 07:23:35,433 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 490 treesize of output 482 [2021-10-13 07:23:35,441 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 2150 treesize of output 2106 [2021-10-13 07:23:35,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:23:35,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630143561] [2021-10-13 07:23:35,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:23:35,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1379966145] [2021-10-13 07:23:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:35,484 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:23:35,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:23:35,485 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:23:35,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-13 07:23:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:36,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 07:23:36,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:36,737 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 [2021-10-13 07:23:36,751 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 [2021-10-13 07:23:37,887 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:23:37,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-10-13 07:23:37,901 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 16 treesize of output 18 [2021-10-13 07:23:38,200 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 07:23:38,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 32 [2021-10-13 07:23:38,295 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 07:23:38,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 18 [2021-10-13 07:23:38,685 INFO L354 Elim1Store]: treesize reduction 50, result has 33.3 percent of original size [2021-10-13 07:23:38,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 45 treesize of output 57 [2021-10-13 07:23:38,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:23:38,857 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-13 07:23:38,857 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 2 case distinctions, treesize of input 28 treesize of output 30 [2021-10-13 07:23:41,317 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-10-13 07:23:41,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 112 [2021-10-13 07:23:41,412 INFO L354 Elim1Store]: treesize reduction 128, result has 15.8 percent of original size [2021-10-13 07:23:41,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 93 [2021-10-13 07:23:45,783 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 07:23:45,784 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 82 treesize of output 64 [2021-10-13 07:23:45,803 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-13 07:23:45,804 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 55 treesize of output 33 [2021-10-13 07:23:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:45,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:45,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:45,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-10-13 07:23:45,974 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:45,975 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 71 [2021-10-13 07:23:47,457 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 897 treesize of output 885 [2021-10-13 07:23:47,467 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 7773 treesize of output 7633 [2021-10-13 07:23:47,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:23:47,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458063541] [2021-10-13 07:23:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:23:47,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:23:47,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:23:47,600 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:23:47,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 07:23:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:23:48,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 07:23:48,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:48,704 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 [2021-10-13 07:23:50,016 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-13 07:23:50,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-10-13 07:23:50,037 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 16 treesize of output 18 [2021-10-13 07:23:50,412 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-13 07:23:50,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 28 [2021-10-13 07:23:50,480 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-13 07:23:50,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 18 [2021-10-13 07:23:50,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:23:50,723 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:23:50,724 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 41 treesize of output 43 [2021-10-13 07:23:50,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:23:50,788 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:23:50,788 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 28 treesize of output 30 [2021-10-13 07:23:51,076 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:23:51,077 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 3 case distinctions, treesize of input 91 treesize of output 85 [2021-10-13 07:23:51,089 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:23:51,090 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 3 case distinctions, treesize of input 76 treesize of output 70 [2021-10-13 07:23:53,431 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:23:53,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 80 treesize of output 60 [2021-10-13 07:23:53,442 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 07:23:53,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 51 treesize of output 35 [2021-10-13 07:23:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:54,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:55,257 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:55,259 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 87 [2021-10-13 07:23:55,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:23:55,262 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-10-13 07:24:25,661 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 1101 treesize of output 1081 [2021-10-13 07:24:25,685 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 4056 treesize of output 3976 [2021-10-13 07:24:25,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 07:24:25,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:24:25,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 07:24:25,765 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 07:24:25,765 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 07:24:25,771 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATION [2021-10-13 07:24:25,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 07:24:25,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 07:24:25,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 07:24:25,774 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 07:24:25,775 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 07:24:25,775 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 07:24:25,775 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 07:24:25,775 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 07:24:25,775 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 07:24:25,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 07:24:25,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 07:24:25,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 07:24:25,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 07:24:25,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 07:24:25,777 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 07:24:25,777 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 07:24:25,777 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 07:24:25,777 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 07:24:25,777 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-13 07:24:25,778 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-13 07:24:25,778 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-13 07:24:25,778 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-13 07:24:25,778 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-13 07:24:25,778 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-13 07:24:25,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-13 07:24:25,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-13 07:24:25,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-13 07:24:25,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-13 07:24:25,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-10-13 07:24:25,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION [2021-10-13 07:24:25,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION [2021-10-13 07:24:25,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-10-13 07:24:25,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION [2021-10-13 07:24:25,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION [2021-10-13 07:24:25,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION [2021-10-13 07:24:25,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION [2021-10-13 07:24:25,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATION [2021-10-13 07:24:25,781 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION [2021-10-13 07:24:25,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION [2021-10-13 07:24:25,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40REQUIRES_VIOLATION [2021-10-13 07:24:25,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41REQUIRES_VIOLATION [2021-10-13 07:24:25,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42REQUIRES_VIOLATION [2021-10-13 07:24:25,782 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43REQUIRES_VIOLATION [2021-10-13 07:24:25,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44REQUIRES_VIOLATION [2021-10-13 07:24:25,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45REQUIRES_VIOLATION [2021-10-13 07:24:25,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46REQUIRES_VIOLATION [2021-10-13 07:24:25,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47REQUIRES_VIOLATION [2021-10-13 07:24:25,783 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr48REQUIRES_VIOLATION [2021-10-13 07:24:25,784 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr49REQUIRES_VIOLATION [2021-10-13 07:24:25,784 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr50REQUIRES_VIOLATION [2021-10-13 07:24:25,784 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr51REQUIRES_VIOLATION [2021-10-13 07:24:25,784 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr52REQUIRES_VIOLATION [2021-10-13 07:24:25,784 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr53REQUIRES_VIOLATION [2021-10-13 07:24:25,785 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr54REQUIRES_VIOLATION [2021-10-13 07:24:25,785 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr55REQUIRES_VIOLATION [2021-10-13 07:24:25,785 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr56REQUIRES_VIOLATION [2021-10-13 07:24:25,785 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr57REQUIRES_VIOLATION [2021-10-13 07:24:25,785 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr58REQUIRES_VIOLATION [2021-10-13 07:24:25,786 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr59REQUIRES_VIOLATION [2021-10-13 07:24:25,786 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr60REQUIRES_VIOLATION [2021-10-13 07:24:25,786 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr61REQUIRES_VIOLATION [2021-10-13 07:24:25,786 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr62REQUIRES_VIOLATION [2021-10-13 07:24:25,786 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr63REQUIRES_VIOLATION [2021-10-13 07:24:25,787 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:24:25,787 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr65ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:24:25,787 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:24:25,788 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:24:25,788 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr68ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:24:25,788 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:24:25,788 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr70ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:24:25,788 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr71ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:24:25,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:26,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:26,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:26,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:24:26,402 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:24:26,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:24:26 BoogieIcfgContainer [2021-10-13 07:24:26,424 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:24:26,425 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:24:26,425 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:24:26,425 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:24:26,426 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:21:13" (3/4) ... [2021-10-13 07:24:26,429 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:24:26,429 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:24:26,430 INFO L168 Benchmark]: Toolchain (without parser) took 194728.34 ms. Allocated memory was 56.6 MB in the beginning and 98.6 MB in the end (delta: 41.9 MB). Free memory was 33.4 MB in the beginning and 52.5 MB in the end (delta: -19.1 MB). Peak memory consumption was 21.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:26,431 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 56.6 MB. Free memory was 37.8 MB in the beginning and 37.7 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:24:26,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 573.69 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 33.2 MB in the beginning and 45.0 MB in the end (delta: -11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:26,432 INFO L168 Benchmark]: Boogie Procedure Inliner took 97.83 ms. Allocated memory is still 69.2 MB. Free memory was 44.8 MB in the beginning and 42.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:26,432 INFO L168 Benchmark]: Boogie Preprocessor took 67.97 ms. Allocated memory is still 69.2 MB. Free memory was 42.4 MB in the beginning and 40.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:26,433 INFO L168 Benchmark]: RCFGBuilder took 1031.06 ms. Allocated memory is still 69.2 MB. Free memory was 40.1 MB in the beginning and 48.8 MB in the end (delta: -8.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:26,433 INFO L168 Benchmark]: TraceAbstraction took 192945.32 ms. Allocated memory was 69.2 MB in the beginning and 98.6 MB in the end (delta: 29.4 MB). Free memory was 48.2 MB in the beginning and 53.4 MB in the end (delta: -5.1 MB). Peak memory consumption was 58.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:24:26,433 INFO L168 Benchmark]: Witness Printer took 4.92 ms. Allocated memory is still 98.6 MB. Free memory was 53.4 MB in the beginning and 52.5 MB in the end (delta: 832.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:24:26,436 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 56.6 MB. Free memory was 37.8 MB in the beginning and 37.7 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 573.69 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 33.2 MB in the beginning and 45.0 MB in the end (delta: -11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 97.83 ms. Allocated memory is still 69.2 MB. Free memory was 44.8 MB in the beginning and 42.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 67.97 ms. Allocated memory is still 69.2 MB. Free memory was 42.4 MB in the beginning and 40.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1031.06 ms. Allocated memory is still 69.2 MB. Free memory was 40.1 MB in the beginning and 48.8 MB in the end (delta: -8.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 192945.32 ms. Allocated memory was 69.2 MB in the beginning and 98.6 MB in the end (delta: 29.4 MB). Free memory was 48.2 MB in the beginning and 53.4 MB in the end (delta: -5.1 MB). Peak memory consumption was 58.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.92 ms. Allocated memory is still 98.6 MB. Free memory was 53.4 MB in the beginning and 52.5 MB in the end (delta: 832.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L627] const int len = 2; [L628] const int data = 1; [L629] DLL s = dll_circular_create(len, data); [L576] DLL temp = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == temp) [L580] temp->next = ((void *)0) [L581] temp->prev = ((void *)0) [L582] temp->data = data [L583] return temp; [L586] DLL head = node_create(data); [L587] DLL last = head; [L588] COND TRUE len > 1 [L576] DLL temp = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == temp) [L580] temp->next = ((void *)0) [L581] temp->prev = ((void *)0) [L582] temp->data = data [L583] return temp; [L589] DLL new_head = node_create(data); [L590] new_head->next = head [L591] COND TRUE \read(head) [L592] head->prev = new_head [L594] head = new_head [L595] len-- [L588] COND FALSE !(len > 1) [L597] last->next = head [L598] head->prev = last [L599] return head; [L629] DLL s = dll_circular_create(len, data); [L576] DLL temp = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == temp) [L580] temp->next = ((void *)0) [L581] temp->prev = ((void *)0) [L582] temp->data = data [L583] return temp; [L613] DLL new_last = node_create(data); [L614] EXPR \read(*head) [L614] COND FALSE !(((void *)0) == *head) [L619] EXPR \read(*head) [L619] (*head)->prev - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 597]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 615]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 615]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 617]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 617]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 620]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 621]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 622]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 631]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 631]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 634]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 634]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 637]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 637]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 639]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 639]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 643]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 643]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 603]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 603]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 645]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 148 locations, 72 error locations. Started 1 CEGAR loops. OverallTime: 192863.2ms, OverallIterations: 18, TraceHistogramMax: 1, EmptinessCheckTime: 28.1ms, AutomataDifference: 50212.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1078 SDtfs, 6063 SDslu, 1012 SDs, 0 SdLazy, 2528 SolverSat, 229 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 34055.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 896 GetRequests, 737 SyntacticMatches, 7 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 45459.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=148occurred in iteration=0, InterpolantAutomatonStates: 111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 122.4ms AutomataMinimizationTime, 17 MinimizatonAttempts, 217 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 242.9ms SsaConstructionTime, 1743.2ms SatisfiabilityAnalysisTime, 51824.6ms InterpolantComputationTime, 438 NumberOfCodeBlocks, 438 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 834 ConstructedInterpolants, 163 QuantifiedInterpolants, 9728 SizeOfPredicates, 106 NumberOfNonLiveVariables, 2572 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 42 InterpolantComputations, 27 PerfectInterpolantSequences, 13/28 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:24:26,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49c382a1-6b43-436b-aa98-1199fde7e3ef/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...