./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh --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 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:38:59,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:38:59,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:38:59,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:38:59,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:38:59,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:38:59,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:38:59,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:38:59,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:38:59,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:38:59,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:38:59,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:38:59,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:38:59,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:38:59,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:38:59,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:38:59,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:38:59,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:38:59,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:38:59,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:38:59,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:38:59,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:38:59,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:38:59,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:38:59,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:38:59,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:38:59,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:38:59,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:38:59,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:38:59,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:38:59,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:38:59,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:38:59,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:38:59,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:38:59,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:38:59,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:38:59,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:38:59,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:38:59,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:38:59,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:38:59,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:38:59,467 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 06:38:59,488 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:38:59,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:38:59,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:38:59,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:38:59,490 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:38:59,490 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:38:59,490 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:38:59,490 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:38:59,490 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:38:59,491 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:38:59,491 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:38:59,491 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:38:59,491 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:38:59,491 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:38:59,491 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:38:59,492 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:38:59,492 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:38:59,492 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:38:59,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 06:38:59,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 06:38:59,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:38:59,493 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:38:59,493 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 06:38:59,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:38:59,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:38:59,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:38:59,499 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 06:38:59,500 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 06:38:59,500 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 06:38:59,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:38:59,500 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 06:38:59,500 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:38:59,500 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:38:59,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:38:59,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:38:59,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:38:59,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:38:59,501 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:38:59,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:38:59,501 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:38:59,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:38:59,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:38:59,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 [2022-12-14 06:38:59,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:38:59,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:38:59,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:38:59,717 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:38:59,717 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:38:59,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread/queue.i [2022-12-14 06:39:02,279 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:39:02,443 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:39:02,444 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/sv-benchmarks/c/pthread/queue.i [2022-12-14 06:39:02,454 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/data/acfb8550c/eb7223cf9e524b859b8154e614fa2fe0/FLAG943e2b445 [2022-12-14 06:39:02,469 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/data/acfb8550c/eb7223cf9e524b859b8154e614fa2fe0 [2022-12-14 06:39:02,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:39:02,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:39:02,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:39:02,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:39:02,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:39:02,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:39:02" (1/1) ... [2022-12-14 06:39:02,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17e7b7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02, skipping insertion in model container [2022-12-14 06:39:02,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:39:02" (1/1) ... [2022-12-14 06:39:02,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:39:02,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:39:02,848 WARN L237 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_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/sv-benchmarks/c/pthread/queue.i[43284,43297] [2022-12-14 06:39:02,852 WARN L237 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_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/sv-benchmarks/c/pthread/queue.i[43491,43504] [2022-12-14 06:39:02,854 WARN L237 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_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/sv-benchmarks/c/pthread/queue.i[43772,43785] [2022-12-14 06:39:02,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:39:02,866 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:39:02,895 WARN L237 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_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/sv-benchmarks/c/pthread/queue.i[43284,43297] [2022-12-14 06:39:02,896 WARN L237 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_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/sv-benchmarks/c/pthread/queue.i[43491,43504] [2022-12-14 06:39:02,898 WARN L237 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_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/sv-benchmarks/c/pthread/queue.i[43772,43785] [2022-12-14 06:39:02,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:39:02,935 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:39:02,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02 WrapperNode [2022-12-14 06:39:02,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:39:02,936 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:39:02,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:39:02,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:39:02,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02" (1/1) ... [2022-12-14 06:39:02,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02" (1/1) ... [2022-12-14 06:39:02,978 INFO L138 Inliner]: procedures = 274, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 250 [2022-12-14 06:39:02,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:39:02,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:39:02,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:39:02,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:39:02,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02" (1/1) ... [2022-12-14 06:39:02,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02" (1/1) ... [2022-12-14 06:39:02,989 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02" (1/1) ... [2022-12-14 06:39:02,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02" (1/1) ... [2022-12-14 06:39:02,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02" (1/1) ... [2022-12-14 06:39:02,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02" (1/1) ... [2022-12-14 06:39:03,001 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02" (1/1) ... [2022-12-14 06:39:03,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02" (1/1) ... [2022-12-14 06:39:03,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:39:03,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:39:03,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:39:03,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:39:03,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02" (1/1) ... [2022-12-14 06:39:03,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:39:03,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:39:03,030 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:39:03,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:39:03,065 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-14 06:39:03,066 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-14 06:39:03,066 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-14 06:39:03,066 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-14 06:39:03,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 06:39:03,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:39:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:39:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:39:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-14 06:39:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:39:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:39:03,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:39:03,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:39:03,069 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 06:39:03,192 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:39:03,194 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:39:03,622 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:39:03,631 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:39:03,631 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 06:39:03,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:39:03 BoogieIcfgContainer [2022-12-14 06:39:03,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:39:03,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:39:03,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:39:03,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:39:03,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:39:02" (1/3) ... [2022-12-14 06:39:03,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab8b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:39:03, skipping insertion in model container [2022-12-14 06:39:03,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:39:02" (2/3) ... [2022-12-14 06:39:03,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab8b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:39:03, skipping insertion in model container [2022-12-14 06:39:03,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:39:03" (3/3) ... [2022-12-14 06:39:03,641 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2022-12-14 06:39:03,656 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:39:03,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2022-12-14 06:39:03,657 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 06:39:03,762 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 06:39:03,792 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 06:39:03,804 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 352 places, 360 transitions, 736 flow [2022-12-14 06:39:03,808 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 352 places, 360 transitions, 736 flow [2022-12-14 06:39:03,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 352 places, 360 transitions, 736 flow [2022-12-14 06:39:03,953 INFO L130 PetriNetUnfolder]: 15/358 cut-off events. [2022-12-14 06:39:03,953 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 06:39:03,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 358 events. 15/358 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 749 event pairs, 0 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 259. Up to 2 conditions per place. [2022-12-14 06:39:03,976 INFO L119 LiptonReduction]: Number of co-enabled transitions 30160 [2022-12-14 06:39:19,705 INFO L134 LiptonReduction]: Checked pairs total: 103448 [2022-12-14 06:39:19,706 INFO L136 LiptonReduction]: Total number of compositions: 579 [2022-12-14 06:39:19,711 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 141 places, 145 transitions, 306 flow [2022-12-14 06:39:19,905 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9954 states, 7297 states have (on average 3.917089214745786) internal successors, (28583), 9953 states have internal predecessors, (28583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:19,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:39:19,924 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@34f56b4a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:39:19,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2022-12-14 06:39:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 9954 states, 7297 states have (on average 3.917089214745786) internal successors, (28583), 9953 states have internal predecessors, (28583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-12-14 06:39:19,944 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:19,944 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-12-14 06:39:19,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:19,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:19,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1599, now seen corresponding path program 1 times [2022-12-14 06:39:19,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:19,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923854533] [2022-12-14 06:39:19,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:19,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:20,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:20,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923854533] [2022-12-14 06:39:20,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923854533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:20,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:20,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-14 06:39:20,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571176172] [2022-12-14 06:39:20,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:20,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 06:39:20,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:20,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 06:39:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:39:20,074 INFO L87 Difference]: Start difference. First operand has 9954 states, 7297 states have (on average 3.917089214745786) internal successors, (28583), 9953 states have internal predecessors, (28583), 0 states have call successors, (0), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:20,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:20,232 INFO L93 Difference]: Finished difference Result 4608 states and 13223 transitions. [2022-12-14 06:39:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 06:39:20,234 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2022-12-14 06:39:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:20,271 INFO L225 Difference]: With dead ends: 4608 [2022-12-14 06:39:20,271 INFO L226 Difference]: Without dead ends: 4608 [2022-12-14 06:39:20,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 06:39:20,274 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:20,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4608 states. [2022-12-14 06:39:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4608 to 4608. [2022-12-14 06:39:20,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 4039 states have (on average 3.2738301559792027) internal successors, (13223), 4607 states have internal predecessors, (13223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 13223 transitions. [2022-12-14 06:39:20,526 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 13223 transitions. Word has length 1 [2022-12-14 06:39:20,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:20,527 INFO L495 AbstractCegarLoop]: Abstraction has 4608 states and 13223 transitions. [2022-12-14 06:39:20,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:20,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 13223 transitions. [2022-12-14 06:39:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 06:39:20,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:20,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 06:39:20,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:39:20,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1577437, now seen corresponding path program 1 times [2022-12-14 06:39:20,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:20,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861417677] [2022-12-14 06:39:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:20,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:20,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:20,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861417677] [2022-12-14 06:39:20,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861417677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:20,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:20,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:39:20,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132805831] [2022-12-14 06:39:20,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:20,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:39:20,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:20,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:39:20,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:20,802 INFO L87 Difference]: Start difference. First operand 4608 states and 13223 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) [2022-12-14 06:39:20,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:20,967 INFO L93 Difference]: Finished difference Result 4140 states and 11908 transitions. [2022-12-14 06:39:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:39:20,967 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 [2022-12-14 06:39:20,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:20,983 INFO L225 Difference]: With dead ends: 4140 [2022-12-14 06:39:20,983 INFO L226 Difference]: Without dead ends: 4140 [2022-12-14 06:39:20,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:20,984 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 84 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:20,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 5 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2022-12-14 06:39:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 4140. [2022-12-14 06:39:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4140 states, 3708 states have (on average 3.2114347357065802) internal successors, (11908), 4139 states have internal predecessors, (11908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:21,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4140 states to 4140 states and 11908 transitions. [2022-12-14 06:39:21,064 INFO L78 Accepts]: Start accepts. Automaton has 4140 states and 11908 transitions. Word has length 3 [2022-12-14 06:39:21,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:21,065 INFO L495 AbstractCegarLoop]: Abstraction has 4140 states and 11908 transitions. [2022-12-14 06:39:21,065 INFO L496 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) [2022-12-14 06:39:21,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4140 states and 11908 transitions. [2022-12-14 06:39:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 06:39:21,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:21,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 06:39:21,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:39:21,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:21,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:21,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1577326, now seen corresponding path program 1 times [2022-12-14 06:39:21,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:21,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128420068] [2022-12-14 06:39:21,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:21,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:21,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:21,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128420068] [2022-12-14 06:39:21,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128420068] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:21,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:21,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:39:21,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820411205] [2022-12-14 06:39:21,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:21,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:39:21,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:39:21,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:21,112 INFO L87 Difference]: Start difference. First operand 4140 states and 11908 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) [2022-12-14 06:39:21,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:21,249 INFO L93 Difference]: Finished difference Result 4074 states and 11770 transitions. [2022-12-14 06:39:21,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:39:21,250 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 [2022-12-14 06:39:21,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:21,264 INFO L225 Difference]: With dead ends: 4074 [2022-12-14 06:39:21,264 INFO L226 Difference]: Without dead ends: 4074 [2022-12-14 06:39:21,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:21,265 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:21,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 5 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4074 states. [2022-12-14 06:39:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4074 to 4074. [2022-12-14 06:39:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4074 states, 3666 states have (on average 3.210583742498636) internal successors, (11770), 4073 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 11770 transitions. [2022-12-14 06:39:21,338 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 11770 transitions. Word has length 3 [2022-12-14 06:39:21,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:21,338 INFO L495 AbstractCegarLoop]: Abstraction has 4074 states and 11770 transitions. [2022-12-14 06:39:21,338 INFO L496 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) [2022-12-14 06:39:21,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 11770 transitions. [2022-12-14 06:39:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 06:39:21,339 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:21,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 06:39:21,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:39:21,339 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:21,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:21,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1577328, now seen corresponding path program 1 times [2022-12-14 06:39:21,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:21,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994581111] [2022-12-14 06:39:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:21,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:21,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:21,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994581111] [2022-12-14 06:39:21,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994581111] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:21,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:21,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:39:21,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762040880] [2022-12-14 06:39:21,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:21,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:39:21,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:21,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:39:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:21,401 INFO L87 Difference]: Start difference. First operand 4074 states and 11770 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) [2022-12-14 06:39:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:21,526 INFO L93 Difference]: Finished difference Result 4008 states and 11632 transitions. [2022-12-14 06:39:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:39:21,527 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 [2022-12-14 06:39:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:21,540 INFO L225 Difference]: With dead ends: 4008 [2022-12-14 06:39:21,540 INFO L226 Difference]: Without dead ends: 4008 [2022-12-14 06:39:21,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:21,541 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:21,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 5 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:21,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2022-12-14 06:39:21,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 4008. [2022-12-14 06:39:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 3624 states have (on average 3.2097130242825607) internal successors, (11632), 4007 states have internal predecessors, (11632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 11632 transitions. [2022-12-14 06:39:21,607 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 11632 transitions. Word has length 3 [2022-12-14 06:39:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:21,608 INFO L495 AbstractCegarLoop]: Abstraction has 4008 states and 11632 transitions. [2022-12-14 06:39:21,608 INFO L496 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) [2022-12-14 06:39:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 11632 transitions. [2022-12-14 06:39:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 06:39:21,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:21,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 06:39:21,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:39:21,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:21,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:21,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1577434, now seen corresponding path program 1 times [2022-12-14 06:39:21,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:21,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069908869] [2022-12-14 06:39:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:21,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:21,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:21,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069908869] [2022-12-14 06:39:21,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069908869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:21,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:21,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:39:21,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111701071] [2022-12-14 06:39:21,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:21,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:39:21,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:21,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:39:21,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:21,715 INFO L87 Difference]: Start difference. First operand 4008 states and 11632 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) [2022-12-14 06:39:21,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:21,827 INFO L93 Difference]: Finished difference Result 3572 states and 10399 transitions. [2022-12-14 06:39:21,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:39:21,828 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 [2022-12-14 06:39:21,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:21,837 INFO L225 Difference]: With dead ends: 3572 [2022-12-14 06:39:21,837 INFO L226 Difference]: Without dead ends: 3572 [2022-12-14 06:39:21,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:21,838 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:21,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 5 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:21,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2022-12-14 06:39:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 3572. [2022-12-14 06:39:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3572 states, 3299 states have (on average 3.152167323431343) internal successors, (10399), 3571 states have internal predecessors, (10399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3572 states to 3572 states and 10399 transitions. [2022-12-14 06:39:21,896 INFO L78 Accepts]: Start accepts. Automaton has 3572 states and 10399 transitions. Word has length 3 [2022-12-14 06:39:21,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:21,896 INFO L495 AbstractCegarLoop]: Abstraction has 3572 states and 10399 transitions. [2022-12-14 06:39:21,897 INFO L496 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) [2022-12-14 06:39:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3572 states and 10399 transitions. [2022-12-14 06:39:21,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 06:39:21,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:21,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 06:39:21,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:39:21,897 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:21,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:21,898 INFO L85 PathProgramCache]: Analyzing trace with hash 48899492, now seen corresponding path program 1 times [2022-12-14 06:39:21,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:21,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857586406] [2022-12-14 06:39:21,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:21,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:22,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:22,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857586406] [2022-12-14 06:39:22,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857586406] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:22,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:22,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:39:22,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802493420] [2022-12-14 06:39:22,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:22,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:39:22,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:39:22,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:22,252 INFO L87 Difference]: Start difference. First operand 3572 states and 10399 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:22,478 INFO L93 Difference]: Finished difference Result 3571 states and 10397 transitions. [2022-12-14 06:39:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:39:22,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 06:39:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:22,488 INFO L225 Difference]: With dead ends: 3571 [2022-12-14 06:39:22,488 INFO L226 Difference]: Without dead ends: 3571 [2022-12-14 06:39:22,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:22,489 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:22,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:39:22,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3571 states. [2022-12-14 06:39:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3571 to 3571. [2022-12-14 06:39:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3298 states have (on average 3.152516676773802) internal successors, (10397), 3570 states have internal predecessors, (10397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 10397 transitions. [2022-12-14 06:39:22,546 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 10397 transitions. Word has length 4 [2022-12-14 06:39:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:22,546 INFO L495 AbstractCegarLoop]: Abstraction has 3571 states and 10397 transitions. [2022-12-14 06:39:22,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 10397 transitions. [2022-12-14 06:39:22,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 06:39:22,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:22,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 06:39:22,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:39:22,547 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:22,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1515882078, now seen corresponding path program 1 times [2022-12-14 06:39:22,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:22,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071328311] [2022-12-14 06:39:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:22,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:22,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:22,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071328311] [2022-12-14 06:39:22,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071328311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:22,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:22,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:39:22,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601407002] [2022-12-14 06:39:22,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:22,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:39:22,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:22,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:39:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:39:22,700 INFO L87 Difference]: Start difference. First operand 3571 states and 10397 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:22,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:22,878 INFO L93 Difference]: Finished difference Result 3227 states and 9425 transitions. [2022-12-14 06:39:22,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:39:22,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-12-14 06:39:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:22,887 INFO L225 Difference]: With dead ends: 3227 [2022-12-14 06:39:22,887 INFO L226 Difference]: Without dead ends: 3227 [2022-12-14 06:39:22,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:39:22,888 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 140 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:22,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 7 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2022-12-14 06:39:22,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 3227. [2022-12-14 06:39:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 3038 states have (on average 3.1023699802501645) internal successors, (9425), 3226 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:22,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 9425 transitions. [2022-12-14 06:39:22,940 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 9425 transitions. Word has length 5 [2022-12-14 06:39:22,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:22,940 INFO L495 AbstractCegarLoop]: Abstraction has 3227 states and 9425 transitions. [2022-12-14 06:39:22,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 9425 transitions. [2022-12-14 06:39:22,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 06:39:22,940 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:22,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 06:39:22,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:39:22,941 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:22,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1515884282, now seen corresponding path program 1 times [2022-12-14 06:39:22,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:22,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481071506] [2022-12-14 06:39:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:22,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:23,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:23,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481071506] [2022-12-14 06:39:23,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481071506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:23,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:23,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:39:23,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771864321] [2022-12-14 06:39:23,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:23,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:39:23,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:23,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:39:23,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:39:23,208 INFO L87 Difference]: Start difference. First operand 3227 states and 9425 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:23,373 INFO L93 Difference]: Finished difference Result 3342 states and 9754 transitions. [2022-12-14 06:39:23,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:39:23,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-12-14 06:39:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:23,386 INFO L225 Difference]: With dead ends: 3342 [2022-12-14 06:39:23,387 INFO L226 Difference]: Without dead ends: 3342 [2022-12-14 06:39:23,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:39:23,387 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:23,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2022-12-14 06:39:23,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 3302. [2022-12-14 06:39:23,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3302 states, 3113 states have (on average 3.096691294571153) internal successors, (9640), 3301 states have internal predecessors, (9640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:23,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 9640 transitions. [2022-12-14 06:39:23,442 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 9640 transitions. Word has length 5 [2022-12-14 06:39:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:23,442 INFO L495 AbstractCegarLoop]: Abstraction has 3302 states and 9640 transitions. [2022-12-14 06:39:23,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 9640 transitions. [2022-12-14 06:39:23,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 06:39:23,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:23,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 06:39:23,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:39:23,443 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:23,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:23,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1515844185, now seen corresponding path program 1 times [2022-12-14 06:39:23,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:23,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316186286] [2022-12-14 06:39:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:23,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:23,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:23,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316186286] [2022-12-14 06:39:23,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316186286] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:23,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:23,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:39:23,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917656475] [2022-12-14 06:39:23,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:23,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:39:23,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:23,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:39:23,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:39:23,491 INFO L87 Difference]: Start difference. First operand 3302 states and 9640 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:23,571 INFO L93 Difference]: Finished difference Result 2506 states and 7092 transitions. [2022-12-14 06:39:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:39:23,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-12-14 06:39:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:23,577 INFO L225 Difference]: With dead ends: 2506 [2022-12-14 06:39:23,577 INFO L226 Difference]: Without dead ends: 2506 [2022-12-14 06:39:23,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:39:23,578 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 139 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:23,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 5 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2022-12-14 06:39:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2506. [2022-12-14 06:39:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 2380 states have (on average 2.9798319327731093) internal successors, (7092), 2505 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 7092 transitions. [2022-12-14 06:39:23,618 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 7092 transitions. Word has length 5 [2022-12-14 06:39:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:23,618 INFO L495 AbstractCegarLoop]: Abstraction has 2506 states and 7092 transitions. [2022-12-14 06:39:23,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 7092 transitions. [2022-12-14 06:39:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 06:39:23,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:23,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 06:39:23,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:39:23,619 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:23,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:23,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1515844186, now seen corresponding path program 1 times [2022-12-14 06:39:23,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:23,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550898661] [2022-12-14 06:39:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:23,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:23,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:23,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550898661] [2022-12-14 06:39:23,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550898661] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:23,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:23,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:39:23,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25010410] [2022-12-14 06:39:23,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:23,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:39:23,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:23,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:39:23,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:39:23,708 INFO L87 Difference]: Start difference. First operand 2506 states and 7092 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:23,793 INFO L93 Difference]: Finished difference Result 1710 states and 4544 transitions. [2022-12-14 06:39:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:39:23,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-12-14 06:39:23,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:23,797 INFO L225 Difference]: With dead ends: 1710 [2022-12-14 06:39:23,797 INFO L226 Difference]: Without dead ends: 1710 [2022-12-14 06:39:23,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:39:23,798 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:23,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 5 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:23,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-12-14 06:39:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1710. [2022-12-14 06:39:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1647 states have (on average 2.758955676988464) internal successors, (4544), 1709 states have internal predecessors, (4544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 4544 transitions. [2022-12-14 06:39:23,831 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 4544 transitions. Word has length 5 [2022-12-14 06:39:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:23,831 INFO L495 AbstractCegarLoop]: Abstraction has 1710 states and 4544 transitions. [2022-12-14 06:39:23,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 4544 transitions. [2022-12-14 06:39:23,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 06:39:23,831 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:23,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:39:23,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:39:23,832 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:23,832 INFO L85 PathProgramCache]: Analyzing trace with hash 732419962, now seen corresponding path program 1 times [2022-12-14 06:39:23,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:23,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8241462] [2022-12-14 06:39:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:23,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:23,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:23,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8241462] [2022-12-14 06:39:23,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8241462] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:23,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:23,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:39:23,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431329567] [2022-12-14 06:39:23,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:23,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:39:23,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:23,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:39:23,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:23,866 INFO L87 Difference]: Start difference. First operand 1710 states and 4544 transitions. Second operand has 3 states, 2 states have (on average 3.5) 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) [2022-12-14 06:39:23,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:23,966 INFO L93 Difference]: Finished difference Result 1320 states and 3426 transitions. [2022-12-14 06:39:23,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:39:23,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) 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 [2022-12-14 06:39:23,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:23,970 INFO L225 Difference]: With dead ends: 1320 [2022-12-14 06:39:23,970 INFO L226 Difference]: Without dead ends: 1316 [2022-12-14 06:39:23,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:23,971 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:23,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 11 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-12-14 06:39:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1276. [2022-12-14 06:39:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1237 states have (on average 2.712206952303961) internal successors, (3355), 1275 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 3355 transitions. [2022-12-14 06:39:23,989 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 3355 transitions. Word has length 7 [2022-12-14 06:39:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:23,989 INFO L495 AbstractCegarLoop]: Abstraction has 1276 states and 3355 transitions. [2022-12-14 06:39:23,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) 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) [2022-12-14 06:39:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 3355 transitions. [2022-12-14 06:39:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 06:39:23,990 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:23,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:39:23,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:39:23,990 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:23,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1370023143, now seen corresponding path program 1 times [2022-12-14 06:39:23,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:23,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751390939] [2022-12-14 06:39:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:23,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:24,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:24,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:24,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751390939] [2022-12-14 06:39:24,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751390939] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:24,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:24,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:39:24,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125387156] [2022-12-14 06:39:24,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:24,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:39:24,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:24,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:39:24,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:24,059 INFO L87 Difference]: Start difference. First operand 1276 states and 3355 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:24,136 INFO L93 Difference]: Finished difference Result 1172 states and 3089 transitions. [2022-12-14 06:39:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:39:24,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 06:39:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:24,139 INFO L225 Difference]: With dead ends: 1172 [2022-12-14 06:39:24,139 INFO L226 Difference]: Without dead ends: 1172 [2022-12-14 06:39:24,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:24,140 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:24,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 5 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:24,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-12-14 06:39:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1172. [2022-12-14 06:39:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1146 states have (on average 2.695462478184991) internal successors, (3089), 1171 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:24,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 3089 transitions. [2022-12-14 06:39:24,162 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 3089 transitions. Word has length 10 [2022-12-14 06:39:24,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:24,162 INFO L495 AbstractCegarLoop]: Abstraction has 1172 states and 3089 transitions. [2022-12-14 06:39:24,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:24,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 3089 transitions. [2022-12-14 06:39:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 06:39:24,163 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:24,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:39:24,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:39:24,163 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:24,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:24,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1370023145, now seen corresponding path program 1 times [2022-12-14 06:39:24,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:24,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246957254] [2022-12-14 06:39:24,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:24,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:24,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:24,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246957254] [2022-12-14 06:39:24,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246957254] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:24,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:24,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 06:39:24,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198490272] [2022-12-14 06:39:24,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:24,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:39:24,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:24,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:39:24,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:24,264 INFO L87 Difference]: Start difference. First operand 1172 states and 3089 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:24,332 INFO L93 Difference]: Finished difference Result 1160 states and 3060 transitions. [2022-12-14 06:39:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:39:24,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 06:39:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:24,334 INFO L225 Difference]: With dead ends: 1160 [2022-12-14 06:39:24,334 INFO L226 Difference]: Without dead ends: 1160 [2022-12-14 06:39:24,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:24,335 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:24,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 5 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:24,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2022-12-14 06:39:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 1160. [2022-12-14 06:39:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1136 states have (on average 2.693661971830986) internal successors, (3060), 1159 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:24,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 3060 transitions. [2022-12-14 06:39:24,349 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 3060 transitions. Word has length 10 [2022-12-14 06:39:24,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:24,350 INFO L495 AbstractCegarLoop]: Abstraction has 1160 states and 3060 transitions. [2022-12-14 06:39:24,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:24,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 3060 transitions. [2022-12-14 06:39:24,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 06:39:24,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:24,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:39:24,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:39:24,351 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:24,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:24,351 INFO L85 PathProgramCache]: Analyzing trace with hash 478958355, now seen corresponding path program 1 times [2022-12-14 06:39:24,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:24,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788840105] [2022-12-14 06:39:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:24,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:24,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:24,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:24,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788840105] [2022-12-14 06:39:24,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788840105] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:24,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:24,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:39:24,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161240516] [2022-12-14 06:39:24,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:24,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:39:24,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:24,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:39:24,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:39:24,447 INFO L87 Difference]: Start difference. First operand 1160 states and 3060 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-12-14 06:39:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:24,559 INFO L93 Difference]: Finished difference Result 1172 states and 3077 transitions. [2022-12-14 06:39:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:39:24,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 [2022-12-14 06:39:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:24,563 INFO L225 Difference]: With dead ends: 1172 [2022-12-14 06:39:24,563 INFO L226 Difference]: Without dead ends: 1172 [2022-12-14 06:39:24,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:39:24,564 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 230 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:24,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 7 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:24,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-12-14 06:39:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1148. [2022-12-14 06:39:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1126 states have (on average 2.691829484902309) internal successors, (3031), 1147 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3031 transitions. [2022-12-14 06:39:24,586 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3031 transitions. Word has length 11 [2022-12-14 06:39:24,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:24,586 INFO L495 AbstractCegarLoop]: Abstraction has 1148 states and 3031 transitions. [2022-12-14 06:39:24,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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) [2022-12-14 06:39:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3031 transitions. [2022-12-14 06:39:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 06:39:24,587 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:24,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:39:24,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:39:24,588 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:24,588 INFO L85 PathProgramCache]: Analyzing trace with hash 478954600, now seen corresponding path program 1 times [2022-12-14 06:39:24,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:24,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92557038] [2022-12-14 06:39:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:24,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:24,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:24,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92557038] [2022-12-14 06:39:24,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92557038] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:24,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:24,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:39:24,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197065415] [2022-12-14 06:39:24,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:24,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:39:24,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:39:24,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:24,630 INFO L87 Difference]: Start difference. First operand 1148 states and 3031 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:24,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:24,708 INFO L93 Difference]: Finished difference Result 1148 states and 3019 transitions. [2022-12-14 06:39:24,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:39:24,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 06:39:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:24,712 INFO L225 Difference]: With dead ends: 1148 [2022-12-14 06:39:24,712 INFO L226 Difference]: Without dead ends: 1148 [2022-12-14 06:39:24,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:39:24,713 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:24,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 14 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2022-12-14 06:39:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1148. [2022-12-14 06:39:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1126 states have (on average 2.681172291296625) internal successors, (3019), 1147 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3019 transitions. [2022-12-14 06:39:24,727 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3019 transitions. Word has length 11 [2022-12-14 06:39:24,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:24,727 INFO L495 AbstractCegarLoop]: Abstraction has 1148 states and 3019 transitions. [2022-12-14 06:39:24,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:24,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3019 transitions. [2022-12-14 06:39:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 06:39:24,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:24,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:39:24,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 06:39:24,728 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash 717364313, now seen corresponding path program 1 times [2022-12-14 06:39:24,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:24,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158138485] [2022-12-14 06:39:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:25,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:25,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158138485] [2022-12-14 06:39:25,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158138485] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:25,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:25,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:39:25,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282077436] [2022-12-14 06:39:25,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:25,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:39:25,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:25,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:39:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:39:25,062 INFO L87 Difference]: Start difference. First operand 1148 states and 3019 transitions. Second operand has 5 states, 5 states have (on average 2.6) 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) [2022-12-14 06:39:25,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:25,193 INFO L93 Difference]: Finished difference Result 1147 states and 3016 transitions. [2022-12-14 06:39:25,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:39:25,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) 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 [2022-12-14 06:39:25,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:25,196 INFO L225 Difference]: With dead ends: 1147 [2022-12-14 06:39:25,196 INFO L226 Difference]: Without dead ends: 1147 [2022-12-14 06:39:25,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:39:25,197 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:25,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:39:25,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-12-14 06:39:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2022-12-14 06:39:25,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1125 states have (on average 2.680888888888889) internal successors, (3016), 1146 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3016 transitions. [2022-12-14 06:39:25,217 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3016 transitions. Word has length 13 [2022-12-14 06:39:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:25,217 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 3016 transitions. [2022-12-14 06:39:25,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) 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) [2022-12-14 06:39:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3016 transitions. [2022-12-14 06:39:25,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 06:39:25,218 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:25,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:39:25,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 06:39:25,218 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:25,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:25,219 INFO L85 PathProgramCache]: Analyzing trace with hash 245325225, now seen corresponding path program 1 times [2022-12-14 06:39:25,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:25,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290687683] [2022-12-14 06:39:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:25,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:25,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:25,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290687683] [2022-12-14 06:39:25,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290687683] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:25,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:25,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:39:25,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032310734] [2022-12-14 06:39:25,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:25,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:39:25,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:25,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:39:25,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:39:25,938 INFO L87 Difference]: Start difference. First operand 1147 states and 3016 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:26,466 INFO L93 Difference]: Finished difference Result 1213 states and 3178 transitions. [2022-12-14 06:39:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:39:26,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-12-14 06:39:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:26,469 INFO L225 Difference]: With dead ends: 1213 [2022-12-14 06:39:26,469 INFO L226 Difference]: Without dead ends: 1213 [2022-12-14 06:39:26,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:39:26,469 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:26,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 26 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:39:26,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-12-14 06:39:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1191. [2022-12-14 06:39:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1169 states have (on average 2.6723695466210438) internal successors, (3124), 1190 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 3124 transitions. [2022-12-14 06:39:26,482 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 3124 transitions. Word has length 14 [2022-12-14 06:39:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:26,482 INFO L495 AbstractCegarLoop]: Abstraction has 1191 states and 3124 transitions. [2022-12-14 06:39:26,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 3124 transitions. [2022-12-14 06:39:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 06:39:26,483 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:26,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:39:26,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 06:39:26,483 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:26,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2084572423, now seen corresponding path program 1 times [2022-12-14 06:39:26,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:26,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566324325] [2022-12-14 06:39:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:26,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:33,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:33,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566324325] [2022-12-14 06:39:33,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566324325] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:33,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:33,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 06:39:33,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522378310] [2022-12-14 06:39:33,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:33,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 06:39:33,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:33,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 06:39:33,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:39:33,906 INFO L87 Difference]: Start difference. First operand 1191 states and 3124 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:55,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:39:56,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:56,859 INFO L93 Difference]: Finished difference Result 1189 states and 3120 transitions. [2022-12-14 06:39:56,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:39:56,860 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-12-14 06:39:56,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:56,862 INFO L225 Difference]: With dead ends: 1189 [2022-12-14 06:39:56,862 INFO L226 Difference]: Without dead ends: 1189 [2022-12-14 06:39:56,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:39:56,862 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:56,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 35 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2022-12-14 06:39:56,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-12-14 06:39:56,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1189. [2022-12-14 06:39:56,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1167 states have (on average 2.673521850899743) internal successors, (3120), 1188 states have internal predecessors, (3120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3120 transitions. [2022-12-14 06:39:56,876 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3120 transitions. Word has length 14 [2022-12-14 06:39:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:56,876 INFO L495 AbstractCegarLoop]: Abstraction has 1189 states and 3120 transitions. [2022-12-14 06:39:56,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3120 transitions. [2022-12-14 06:39:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 06:39:56,877 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:56,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:39:56,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 06:39:56,877 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:56,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:56,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1633932227, now seen corresponding path program 2 times [2022-12-14 06:39:56,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:56,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163930313] [2022-12-14 06:39:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:56,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:39:57,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:57,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163930313] [2022-12-14 06:39:57,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163930313] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:57,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:57,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 06:39:57,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454291266] [2022-12-14 06:39:57,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:57,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 06:39:57,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:57,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 06:39:57,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:39:57,433 INFO L87 Difference]: Start difference. First operand 1189 states and 3120 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:57,831 INFO L93 Difference]: Finished difference Result 1329 states and 3457 transitions. [2022-12-14 06:39:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:39:57,832 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-12-14 06:39:57,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:57,836 INFO L225 Difference]: With dead ends: 1329 [2022-12-14 06:39:57,836 INFO L226 Difference]: Without dead ends: 1329 [2022-12-14 06:39:57,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:39:57,836 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 92 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:57,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 37 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:39:57,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2022-12-14 06:39:57,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1134. [2022-12-14 06:39:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1112 states have (on average 2.6744604316546763) internal successors, (2974), 1133 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 2974 transitions. [2022-12-14 06:39:57,858 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 2974 transitions. Word has length 14 [2022-12-14 06:39:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:57,858 INFO L495 AbstractCegarLoop]: Abstraction has 1134 states and 2974 transitions. [2022-12-14 06:39:57,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:39:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 2974 transitions. [2022-12-14 06:39:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:39:57,859 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:57,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:39:57,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 06:39:57,859 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:39:57,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:57,859 INFO L85 PathProgramCache]: Analyzing trace with hash 336262583, now seen corresponding path program 1 times [2022-12-14 06:39:57,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:57,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047387517] [2022-12-14 06:39:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:57,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:40:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:40:05,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:40:05,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047387517] [2022-12-14 06:40:05,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047387517] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:40:05,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:40:05,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 06:40:05,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619534441] [2022-12-14 06:40:05,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:40:05,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 06:40:05,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:40:05,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 06:40:05,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:40:05,221 INFO L87 Difference]: Start difference. First operand 1134 states and 2974 transitions. Second operand has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 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) [2022-12-14 06:40:53,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:40:53,298 INFO L93 Difference]: Finished difference Result 1340 states and 3484 transitions. [2022-12-14 06:40:53,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:40:53,299 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 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 [2022-12-14 06:40:53,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:40:53,301 INFO L225 Difference]: With dead ends: 1340 [2022-12-14 06:40:53,301 INFO L226 Difference]: Without dead ends: 1340 [2022-12-14 06:40:53,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:40:53,302 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 97 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:40:53,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 50 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 41.0s Time] [2022-12-14 06:40:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2022-12-14 06:40:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1222. [2022-12-14 06:40:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1200 states have (on average 2.658333333333333) internal successors, (3190), 1221 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:40:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 3190 transitions. [2022-12-14 06:40:53,316 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 3190 transitions. Word has length 15 [2022-12-14 06:40:53,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:40:53,316 INFO L495 AbstractCegarLoop]: Abstraction has 1222 states and 3190 transitions. [2022-12-14 06:40:53,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 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) [2022-12-14 06:40:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 3190 transitions. [2022-12-14 06:40:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:40:53,317 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:40:53,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:40:53,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 06:40:53,317 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:40:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:40:53,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1288495217, now seen corresponding path program 2 times [2022-12-14 06:40:53,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:40:53,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932480842] [2022-12-14 06:40:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:40:53,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:40:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:40:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:40:53,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:40:53,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932480842] [2022-12-14 06:40:53,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932480842] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:40:53,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:40:53,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 06:40:53,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797744932] [2022-12-14 06:40:53,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:40:53,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 06:40:53,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:40:53,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 06:40:53,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:40:53,972 INFO L87 Difference]: Start difference. First operand 1222 states and 3190 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 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) [2022-12-14 06:40:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:40:54,608 INFO L93 Difference]: Finished difference Result 1402 states and 3641 transitions. [2022-12-14 06:40:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:40:54,608 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 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 [2022-12-14 06:40:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:40:54,610 INFO L225 Difference]: With dead ends: 1402 [2022-12-14 06:40:54,610 INFO L226 Difference]: Without dead ends: 1402 [2022-12-14 06:40:54,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-12-14 06:40:54,611 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 154 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:40:54,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 43 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:40:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2022-12-14 06:40:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1156. [2022-12-14 06:40:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1134 states have (on average 2.670194003527337) internal successors, (3028), 1155 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:40:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 3028 transitions. [2022-12-14 06:40:54,626 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 3028 transitions. Word has length 15 [2022-12-14 06:40:54,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:40:54,626 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 3028 transitions. [2022-12-14 06:40:54,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 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) [2022-12-14 06:40:54,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 3028 transitions. [2022-12-14 06:40:54,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:40:54,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:40:54,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:40:54,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 06:40:54,627 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:40:54,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:40:54,627 INFO L85 PathProgramCache]: Analyzing trace with hash 204927613, now seen corresponding path program 3 times [2022-12-14 06:40:54,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:40:54,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218016794] [2022-12-14 06:40:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:40:54,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:40:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:40:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:40:55,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:40:55,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218016794] [2022-12-14 06:40:55,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218016794] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:40:55,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:40:55,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 06:40:55,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950140367] [2022-12-14 06:40:55,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:40:55,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 06:40:55,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:40:55,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 06:40:55,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:40:55,176 INFO L87 Difference]: Start difference. First operand 1156 states and 3028 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 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) [2022-12-14 06:40:55,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:40:55,633 INFO L93 Difference]: Finished difference Result 1229 states and 3212 transitions. [2022-12-14 06:40:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:40:55,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 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 [2022-12-14 06:40:55,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:40:55,636 INFO L225 Difference]: With dead ends: 1229 [2022-12-14 06:40:55,636 INFO L226 Difference]: Without dead ends: 1229 [2022-12-14 06:40:55,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:40:55,637 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 149 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:40:55,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 38 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:40:55,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-12-14 06:40:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1145. [2022-12-14 06:40:55,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1123 states have (on average 2.672306322350846) internal successors, (3001), 1144 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:40:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3001 transitions. [2022-12-14 06:40:55,650 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3001 transitions. Word has length 15 [2022-12-14 06:40:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:40:55,650 INFO L495 AbstractCegarLoop]: Abstraction has 1145 states and 3001 transitions. [2022-12-14 06:40:55,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 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) [2022-12-14 06:40:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3001 transitions. [2022-12-14 06:40:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:40:55,651 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:40:55,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:40:55,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 06:40:55,651 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:40:55,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:40:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash 197143513, now seen corresponding path program 4 times [2022-12-14 06:40:55,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:40:55,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573027123] [2022-12-14 06:40:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:40:55,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:40:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:40:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:40:56,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:40:56,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573027123] [2022-12-14 06:40:56,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573027123] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:40:56,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:40:56,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 06:40:56,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796911053] [2022-12-14 06:40:56,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:40:56,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 06:40:56,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:40:56,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 06:40:56,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:40:56,235 INFO L87 Difference]: Start difference. First operand 1145 states and 3001 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 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) [2022-12-14 06:40:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:40:56,746 INFO L93 Difference]: Finished difference Result 1184 states and 3104 transitions. [2022-12-14 06:40:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:40:56,747 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 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 [2022-12-14 06:40:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:40:56,749 INFO L225 Difference]: With dead ends: 1184 [2022-12-14 06:40:56,750 INFO L226 Difference]: Without dead ends: 1184 [2022-12-14 06:40:56,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-14 06:40:56,750 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 102 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:40:56,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 36 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:40:56,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-12-14 06:40:56,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1112. [2022-12-14 06:40:56,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1092 states have (on average 2.673992673992674) internal successors, (2920), 1111 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:40:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 2920 transitions. [2022-12-14 06:40:56,770 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 2920 transitions. Word has length 15 [2022-12-14 06:40:56,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:40:56,770 INFO L495 AbstractCegarLoop]: Abstraction has 1112 states and 2920 transitions. [2022-12-14 06:40:56,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 11 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) [2022-12-14 06:40:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 2920 transitions. [2022-12-14 06:40:56,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 06:40:56,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:40:56,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:40:56,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 06:40:56,772 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:40:56,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:40:56,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1818468066, now seen corresponding path program 1 times [2022-12-14 06:40:56,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:40:56,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349636143] [2022-12-14 06:40:56,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:40:56,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:40:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:40:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:40:57,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:40:57,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349636143] [2022-12-14 06:40:57,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349636143] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:40:57,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:40:57,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 06:40:57,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868577332] [2022-12-14 06:40:57,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:40:57,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 06:40:57,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:40:57,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 06:40:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-14 06:40:57,244 INFO L87 Difference]: Start difference. First operand 1112 states and 2920 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2022-12-14 06:40:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:40:57,588 INFO L93 Difference]: Finished difference Result 1240 states and 3239 transitions. [2022-12-14 06:40:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:40:57,589 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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 [2022-12-14 06:40:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:40:57,591 INFO L225 Difference]: With dead ends: 1240 [2022-12-14 06:40:57,591 INFO L226 Difference]: Without dead ends: 1240 [2022-12-14 06:40:57,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:40:57,591 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 78 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:40:57,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 24 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:40:57,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-12-14 06:40:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1210. [2022-12-14 06:40:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1190 states have (on average 2.673109243697479) internal successors, (3181), 1209 states have internal predecessors, (3181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:40:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 3181 transitions. [2022-12-14 06:40:57,604 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 3181 transitions. Word has length 16 [2022-12-14 06:40:57,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:40:57,605 INFO L495 AbstractCegarLoop]: Abstraction has 1210 states and 3181 transitions. [2022-12-14 06:40:57,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2022-12-14 06:40:57,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 3181 transitions. [2022-12-14 06:40:57,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 06:40:57,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:40:57,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:40:57,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 06:40:57,605 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:40:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:40:57,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1024924562, now seen corresponding path program 1 times [2022-12-14 06:40:57,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:40:57,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103586205] [2022-12-14 06:40:57,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:40:57,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:40:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:40:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:40:58,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:40:58,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103586205] [2022-12-14 06:40:58,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103586205] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:40:58,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:40:58,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 06:40:58,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350897497] [2022-12-14 06:40:58,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:40:58,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 06:40:58,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:40:58,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 06:40:58,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:40:58,146 INFO L87 Difference]: Start difference. First operand 1210 states and 3181 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:40:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:40:58,807 INFO L93 Difference]: Finished difference Result 1328 states and 3475 transitions. [2022-12-14 06:40:58,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:40:58,807 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 06:40:58,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:40:58,809 INFO L225 Difference]: With dead ends: 1328 [2022-12-14 06:40:58,809 INFO L226 Difference]: Without dead ends: 1328 [2022-12-14 06:40:58,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:40:58,810 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 119 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:40:58,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 40 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:40:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2022-12-14 06:40:58,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1199. [2022-12-14 06:40:58,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1179 states have (on average 2.6751484308736218) internal successors, (3154), 1198 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:40:58,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 3154 transitions. [2022-12-14 06:40:58,824 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 3154 transitions. Word has length 17 [2022-12-14 06:40:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:40:58,824 INFO L495 AbstractCegarLoop]: Abstraction has 1199 states and 3154 transitions. [2022-12-14 06:40:58,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:40:58,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 3154 transitions. [2022-12-14 06:40:58,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 06:40:58,824 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:40:58,824 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:40:58,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 06:40:58,824 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:40:58,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:40:58,825 INFO L85 PathProgramCache]: Analyzing trace with hash -633930024, now seen corresponding path program 2 times [2022-12-14 06:40:58,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:40:58,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786616460] [2022-12-14 06:40:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:40:58,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:40:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:40:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:40:59,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:40:59,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786616460] [2022-12-14 06:40:59,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786616460] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:40:59,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:40:59,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-14 06:40:59,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435134971] [2022-12-14 06:40:59,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:40:59,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 06:40:59,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:40:59,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 06:40:59,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:40:59,488 INFO L87 Difference]: Start difference. First operand 1199 states and 3154 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:40:59,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:40:59,986 INFO L93 Difference]: Finished difference Result 1250 states and 3284 transitions. [2022-12-14 06:40:59,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:40:59,987 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 06:40:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:40:59,988 INFO L225 Difference]: With dead ends: 1250 [2022-12-14 06:40:59,989 INFO L226 Difference]: Without dead ends: 1250 [2022-12-14 06:40:59,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-12-14 06:40:59,989 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 136 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:40:59,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 32 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:40:59,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-12-14 06:40:59,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1140. [2022-12-14 06:41:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1120 states have (on average 2.6830357142857144) internal successors, (3005), 1139 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3005 transitions. [2022-12-14 06:41:00,002 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3005 transitions. Word has length 17 [2022-12-14 06:41:00,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:00,002 INFO L495 AbstractCegarLoop]: Abstraction has 1140 states and 3005 transitions. [2022-12-14 06:41:00,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:00,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3005 transitions. [2022-12-14 06:41:00,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 06:41:00,003 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:00,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:41:00,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 06:41:00,003 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:41:00,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:00,003 INFO L85 PathProgramCache]: Analyzing trace with hash -834694718, now seen corresponding path program 1 times [2022-12-14 06:41:00,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:00,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102289714] [2022-12-14 06:41:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:00,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:41:00,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:41:00,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102289714] [2022-12-14 06:41:00,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102289714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:41:00,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:41:00,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 06:41:00,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162299413] [2022-12-14 06:41:00,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:41:00,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 06:41:00,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:00,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 06:41:00,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:41:00,494 INFO L87 Difference]: Start difference. First operand 1140 states and 3005 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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) [2022-12-14 06:41:00,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:41:00,880 INFO L93 Difference]: Finished difference Result 1323 states and 3458 transitions. [2022-12-14 06:41:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:41:00,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 [2022-12-14 06:41:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:41:00,882 INFO L225 Difference]: With dead ends: 1323 [2022-12-14 06:41:00,882 INFO L226 Difference]: Without dead ends: 1323 [2022-12-14 06:41:00,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-12-14 06:41:00,883 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 127 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:41:00,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 21 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:41:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2022-12-14 06:41:00,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1282. [2022-12-14 06:41:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1262 states have (on average 2.672741679873217) internal successors, (3373), 1281 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 3373 transitions. [2022-12-14 06:41:00,897 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 3373 transitions. Word has length 22 [2022-12-14 06:41:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:00,897 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 3373 transitions. [2022-12-14 06:41:00,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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) [2022-12-14 06:41:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 3373 transitions. [2022-12-14 06:41:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 06:41:00,898 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:00,898 INFO L195 NwaCegarLoop]: 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] [2022-12-14 06:41:00,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 06:41:00,898 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:41:00,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:00,898 INFO L85 PathProgramCache]: Analyzing trace with hash -273757582, now seen corresponding path program 1 times [2022-12-14 06:41:00,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:00,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625716177] [2022-12-14 06:41:00,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:00,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:41:01,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:41:01,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625716177] [2022-12-14 06:41:01,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625716177] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:41:01,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:41:01,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:41:01,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77354443] [2022-12-14 06:41:01,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:41:01,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:41:01,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:01,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:41:01,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:41:01,024 INFO L87 Difference]: Start difference. First operand 1282 states and 3373 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:41:01,137 INFO L93 Difference]: Finished difference Result 1633 states and 4277 transitions. [2022-12-14 06:41:01,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:41:01,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 06:41:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:41:01,139 INFO L225 Difference]: With dead ends: 1633 [2022-12-14 06:41:01,139 INFO L226 Difference]: Without dead ends: 1633 [2022-12-14 06:41:01,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:41:01,140 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 81 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:41:01,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 8 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:41:01,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2022-12-14 06:41:01,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1467. [2022-12-14 06:41:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1447 states have (on average 2.6655148583275743) internal successors, (3857), 1466 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 3857 transitions. [2022-12-14 06:41:01,157 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 3857 transitions. Word has length 23 [2022-12-14 06:41:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:01,157 INFO L495 AbstractCegarLoop]: Abstraction has 1467 states and 3857 transitions. [2022-12-14 06:41:01,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 3857 transitions. [2022-12-14 06:41:01,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 06:41:01,159 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:01,159 INFO L195 NwaCegarLoop]: 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] [2022-12-14 06:41:01,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 06:41:01,159 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:41:01,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1029971351, now seen corresponding path program 1 times [2022-12-14 06:41:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:01,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367414668] [2022-12-14 06:41:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:01,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:41:01,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:41:01,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367414668] [2022-12-14 06:41:01,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367414668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:41:01,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:41:01,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:41:01,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730031595] [2022-12-14 06:41:01,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:41:01,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:41:01,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:01,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:41:01,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:41:01,193 INFO L87 Difference]: Start difference. First operand 1467 states and 3857 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:41:01,276 INFO L93 Difference]: Finished difference Result 918 states and 2320 transitions. [2022-12-14 06:41:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:41:01,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 06:41:01,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:41:01,278 INFO L225 Difference]: With dead ends: 918 [2022-12-14 06:41:01,278 INFO L226 Difference]: Without dead ends: 869 [2022-12-14 06:41:01,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:41:01,279 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:41:01,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 9 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:41:01,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-12-14 06:41:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 810. [2022-12-14 06:41:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 795 states have (on average 2.5685534591194967) internal successors, (2042), 809 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2042 transitions. [2022-12-14 06:41:01,292 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2042 transitions. Word has length 26 [2022-12-14 06:41:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:01,293 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 2042 transitions. [2022-12-14 06:41:01,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2042 transitions. [2022-12-14 06:41:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 06:41:01,294 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:01,294 INFO L195 NwaCegarLoop]: 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] [2022-12-14 06:41:01,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 06:41:01,295 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:41:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:01,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1740459406, now seen corresponding path program 1 times [2022-12-14 06:41:01,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:01,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432247247] [2022-12-14 06:41:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:01,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:41:01,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:41:01,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432247247] [2022-12-14 06:41:01,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432247247] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:41:01,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650064869] [2022-12-14 06:41:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:01,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:41:01,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:41:01,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:41:01,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:41:01,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:01,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:41:01,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:41:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:41:01,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:41:01,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650064869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:41:01,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:41:01,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 06:41:01,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980720067] [2022-12-14 06:41:01,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:41:01,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:41:01,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:01,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:41:01,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:41:01,513 INFO L87 Difference]: Start difference. First operand 810 states and 2042 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:41:01,649 INFO L93 Difference]: Finished difference Result 1284 states and 3251 transitions. [2022-12-14 06:41:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:41:01,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 06:41:01,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:41:01,651 INFO L225 Difference]: With dead ends: 1284 [2022-12-14 06:41:01,651 INFO L226 Difference]: Without dead ends: 1284 [2022-12-14 06:41:01,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:41:01,652 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:41:01,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 17 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:41:01,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-12-14 06:41:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 900. [2022-12-14 06:41:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 885 states have (on average 2.6587570621468926) internal successors, (2353), 899 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2353 transitions. [2022-12-14 06:41:01,664 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2353 transitions. Word has length 27 [2022-12-14 06:41:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:01,664 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 2353 transitions. [2022-12-14 06:41:01,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2353 transitions. [2022-12-14 06:41:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 06:41:01,665 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:01,665 INFO L195 NwaCegarLoop]: 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] [2022-12-14 06:41:01,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:41:01,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:41:01,867 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:41:01,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:01,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1934316605, now seen corresponding path program 1 times [2022-12-14 06:41:01,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:01,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907306762] [2022-12-14 06:41:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:01,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:41:02,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:41:02,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907306762] [2022-12-14 06:41:02,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907306762] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:41:02,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:41:02,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:41:02,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652824731] [2022-12-14 06:41:02,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:41:02,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:41:02,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:02,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:41:02,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:41:02,050 INFO L87 Difference]: Start difference. First operand 900 states and 2353 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:02,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:41:02,140 INFO L93 Difference]: Finished difference Result 630 states and 1388 transitions. [2022-12-14 06:41:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:41:02,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2022-12-14 06:41:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:41:02,141 INFO L225 Difference]: With dead ends: 630 [2022-12-14 06:41:02,141 INFO L226 Difference]: Without dead ends: 614 [2022-12-14 06:41:02,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:41:02,142 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:41:02,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 5 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:41:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-12-14 06:41:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2022-12-14 06:41:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 606 states have (on average 2.2293729372937294) internal successors, (1351), 613 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1351 transitions. [2022-12-14 06:41:02,150 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1351 transitions. Word has length 29 [2022-12-14 06:41:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:02,150 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 1351 transitions. [2022-12-14 06:41:02,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1351 transitions. [2022-12-14 06:41:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 06:41:02,151 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:02,151 INFO L195 NwaCegarLoop]: 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] [2022-12-14 06:41:02,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-14 06:41:02,151 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:41:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1387013777, now seen corresponding path program 1 times [2022-12-14 06:41:02,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:02,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844125491] [2022-12-14 06:41:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:02,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:41:02,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:41:02,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844125491] [2022-12-14 06:41:02,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844125491] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:41:02,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152492065] [2022-12-14 06:41:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:02,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:41:02,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:41:02,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:41:02,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:41:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:02,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:41:02,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:41:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:41:02,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:41:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:41:02,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152492065] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:41:02,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [631005976] [2022-12-14 06:41:02,374 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgJoinThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-12-14 06:41:02,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:41:02,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 06:41:02,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881862380] [2022-12-14 06:41:02,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:41:02,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:41:02,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:02,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:41:02,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:41:02,378 INFO L87 Difference]: Start difference. First operand 614 states and 1351 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:02,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:41:02,601 INFO L93 Difference]: Finished difference Result 1140 states and 2528 transitions. [2022-12-14 06:41:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:41:02,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 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 29 [2022-12-14 06:41:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:41:02,603 INFO L225 Difference]: With dead ends: 1140 [2022-12-14 06:41:02,603 INFO L226 Difference]: Without dead ends: 1140 [2022-12-14 06:41:02,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:41:02,604 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 278 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:41:02,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 24 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:41:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-12-14 06:41:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1084. [2022-12-14 06:41:02,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1071 states have (on average 2.3081232492997197) internal successors, (2472), 1083 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2472 transitions. [2022-12-14 06:41:02,621 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2472 transitions. Word has length 29 [2022-12-14 06:41:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:02,622 INFO L495 AbstractCegarLoop]: Abstraction has 1084 states and 2472 transitions. [2022-12-14 06:41:02,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:02,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2472 transitions. [2022-12-14 06:41:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 06:41:02,623 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:02,623 INFO L195 NwaCegarLoop]: 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] [2022-12-14 06:41:02,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:41:02,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adaec5ba-6252-4809-9bf8-4f3fbf6d1b6c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 06:41:02,824 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:41:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash -300159474, now seen corresponding path program 1 times [2022-12-14 06:41:02,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:02,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516271759] [2022-12-14 06:41:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:02,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:41:03,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:41:03,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516271759] [2022-12-14 06:41:03,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516271759] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:41:03,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:41:03,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-14 06:41:03,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480424542] [2022-12-14 06:41:03,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:41:03,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 06:41:03,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:03,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 06:41:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:41:03,632 INFO L87 Difference]: Start difference. First operand 1084 states and 2472 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:04,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:41:04,149 INFO L93 Difference]: Finished difference Result 1325 states and 3001 transitions. [2022-12-14 06:41:04,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:41:04,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-12-14 06:41:04,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:41:04,151 INFO L225 Difference]: With dead ends: 1325 [2022-12-14 06:41:04,151 INFO L226 Difference]: Without dead ends: 1325 [2022-12-14 06:41:04,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-12-14 06:41:04,152 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 126 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:41:04,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 38 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:41:04,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-12-14 06:41:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1079. [2022-12-14 06:41:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1066 states have (on average 2.3095684803001877) internal successors, (2462), 1078 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 2462 transitions. [2022-12-14 06:41:04,164 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 2462 transitions. Word has length 30 [2022-12-14 06:41:04,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:04,164 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 2462 transitions. [2022-12-14 06:41:04,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:04,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 2462 transitions. [2022-12-14 06:41:04,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 06:41:04,165 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:04,165 INFO L195 NwaCegarLoop]: 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] [2022-12-14 06:41:04,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-14 06:41:04,165 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:41:04,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:04,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1204423816, now seen corresponding path program 2 times [2022-12-14 06:41:04,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:04,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777509295] [2022-12-14 06:41:04,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:04,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:05,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:41:05,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:41:05,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777509295] [2022-12-14 06:41:05,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777509295] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:41:05,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:41:05,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-14 06:41:05,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152460147] [2022-12-14 06:41:05,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:41:05,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 06:41:05,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:05,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 06:41:05,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:41:05,005 INFO L87 Difference]: Start difference. First operand 1079 states and 2462 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:41:05,557 INFO L93 Difference]: Finished difference Result 1449 states and 3335 transitions. [2022-12-14 06:41:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 06:41:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-12-14 06:41:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:41:05,559 INFO L225 Difference]: With dead ends: 1449 [2022-12-14 06:41:05,559 INFO L226 Difference]: Without dead ends: 1449 [2022-12-14 06:41:05,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2022-12-14 06:41:05,560 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 177 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:41:05,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 36 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:41:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-12-14 06:41:05,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1019. [2022-12-14 06:41:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1006 states have (on average 2.3121272365805168) internal successors, (2326), 1018 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:05,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2326 transitions. [2022-12-14 06:41:05,571 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2326 transitions. Word has length 30 [2022-12-14 06:41:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:05,572 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 2326 transitions. [2022-12-14 06:41:05,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2326 transitions. [2022-12-14 06:41:05,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 06:41:05,572 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:05,572 INFO L195 NwaCegarLoop]: 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] [2022-12-14 06:41:05,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-14 06:41:05,573 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:41:05,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:05,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1708068774, now seen corresponding path program 3 times [2022-12-14 06:41:05,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:05,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33254445] [2022-12-14 06:41:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:05,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:41:06,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:41:06,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33254445] [2022-12-14 06:41:06,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33254445] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:41:06,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:41:06,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-14 06:41:06,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623906273] [2022-12-14 06:41:06,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:41:06,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 06:41:06,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:06,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 06:41:06,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:41:06,366 INFO L87 Difference]: Start difference. First operand 1019 states and 2326 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:41:06,964 INFO L93 Difference]: Finished difference Result 1377 states and 3181 transitions. [2022-12-14 06:41:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:41:06,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-12-14 06:41:06,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:41:06,966 INFO L225 Difference]: With dead ends: 1377 [2022-12-14 06:41:06,966 INFO L226 Difference]: Without dead ends: 1377 [2022-12-14 06:41:06,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:41:06,966 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 206 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:41:06,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 46 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:41:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2022-12-14 06:41:06,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1009. [2022-12-14 06:41:06,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 996 states have (on average 2.3152610441767068) internal successors, (2306), 1008 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2306 transitions. [2022-12-14 06:41:06,977 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2306 transitions. Word has length 30 [2022-12-14 06:41:06,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:06,977 INFO L495 AbstractCegarLoop]: Abstraction has 1009 states and 2306 transitions. [2022-12-14 06:41:06,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:06,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2306 transitions. [2022-12-14 06:41:06,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 06:41:06,978 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:06,978 INFO L195 NwaCegarLoop]: 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] [2022-12-14 06:41:06,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-14 06:41:06,978 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:41:06,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:06,978 INFO L85 PathProgramCache]: Analyzing trace with hash -902966604, now seen corresponding path program 4 times [2022-12-14 06:41:06,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:06,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617863198] [2022-12-14 06:41:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:06,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:41:07,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:41:07,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617863198] [2022-12-14 06:41:07,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617863198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:41:07,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:41:07,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-14 06:41:07,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513859775] [2022-12-14 06:41:07,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:41:07,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 06:41:07,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:07,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 06:41:07,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:41:07,697 INFO L87 Difference]: Start difference. First operand 1009 states and 2306 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:08,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:41:08,205 INFO L93 Difference]: Finished difference Result 1087 states and 2477 transitions. [2022-12-14 06:41:08,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 06:41:08,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-12-14 06:41:08,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:41:08,206 INFO L225 Difference]: With dead ends: 1087 [2022-12-14 06:41:08,206 INFO L226 Difference]: Without dead ends: 1087 [2022-12-14 06:41:08,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-12-14 06:41:08,207 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 141 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:41:08,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 36 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:41:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2022-12-14 06:41:08,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 994. [2022-12-14 06:41:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 981 states have (on average 2.314984709480122) internal successors, (2271), 993 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 2271 transitions. [2022-12-14 06:41:08,216 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 2271 transitions. Word has length 30 [2022-12-14 06:41:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:08,216 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 2271 transitions. [2022-12-14 06:41:08,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:41:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 2271 transitions. [2022-12-14 06:41:08,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 06:41:08,217 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:08,217 INFO L195 NwaCegarLoop]: 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] [2022-12-14 06:41:08,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-14 06:41:08,217 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-12-14 06:41:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2085682114, now seen corresponding path program 1 times [2022-12-14 06:41:08,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:08,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525320312] [2022-12-14 06:41:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:08,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat