./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-sorted-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-sorted-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS --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 618946a6e113450d0f3efa55a455801e1c2225c3ba6f88e87a9e8ad02019b85f --- 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-8393723 [2022-11-19 06:57:01,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:57:01,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:57:01,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:57:01,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:57:01,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:57:01,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:57:01,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:57:01,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:57:01,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:57:01,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:57:01,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:57:01,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:57:01,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:57:01,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:57:01,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:57:01,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:57:01,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:57:01,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:57:01,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:57:01,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:57:01,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:57:01,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:57:01,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:57:01,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:57:01,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:57:01,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:57:01,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:57:01,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:57:01,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:57:01,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:57:01,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:57:01,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:57:01,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:57:01,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:57:01,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:57:01,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:57:01,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:57:01,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:57:01,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:57:01,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:57:01,305 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 06:57:01,342 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:57:01,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:57:01,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:57:01,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:57:01,355 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:57:01,355 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:57:01,356 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:57:01,356 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:57:01,356 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:57:01,356 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:57:01,358 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:57:01,358 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:57:01,358 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:57:01,358 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:57:01,359 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:57:01,359 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:57:01,359 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:57:01,359 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:57:01,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 06:57:01,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 06:57:01,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:57:01,363 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:57:01,363 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 06:57:01,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:57:01,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:57:01,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:57:01,364 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 06:57:01,364 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 06:57:01,365 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 06:57:01,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:57:01,365 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:57:01,366 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:57:01,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:57:01,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:57:01,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:57:01,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:57:01,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:57:01,368 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:57:01,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:57:01,368 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:57:01,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:57:01,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:57:01,369 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_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 618946a6e113450d0f3efa55a455801e1c2225c3ba6f88e87a9e8ad02019b85f [2022-11-19 06:57:01,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:57:01,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:57:01,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:57:01,757 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:57:01,759 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:57:01,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/forester-heap/sll-sorted-2.i [2022-11-19 06:57:01,854 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/data/eb0062748/a9a15b11f92342d08d53838868397c2e/FLAG22beb5c45 [2022-11-19 06:57:02,678 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:57:02,683 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i [2022-11-19 06:57:02,706 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/data/eb0062748/a9a15b11f92342d08d53838868397c2e/FLAG22beb5c45 [2022-11-19 06:57:02,897 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/data/eb0062748/a9a15b11f92342d08d53838868397c2e [2022-11-19 06:57:02,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:57:02,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:57:02,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:57:02,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:57:02,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:57:02,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:57:02" (1/1) ... [2022-11-19 06:57:02,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@863df29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:02, skipping insertion in model container [2022-11-19 06:57:02,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:57:02" (1/1) ... [2022-11-19 06:57:02,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:57:03,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:57:03,417 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22317,22330] [2022-11-19 06:57:03,423 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22452,22465] [2022-11-19 06:57:03,425 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22612,22625] [2022-11-19 06:57:03,430 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22941,22954] [2022-11-19 06:57:03,431 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23005,23018] [2022-11-19 06:57:03,433 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23136,23149] [2022-11-19 06:57:03,434 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23200,23213] [2022-11-19 06:57:03,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:57:03,447 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:57:03,485 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22317,22330] [2022-11-19 06:57:03,488 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22452,22465] [2022-11-19 06:57:03,490 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22612,22625] [2022-11-19 06:57:03,493 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[22941,22954] [2022-11-19 06:57:03,495 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23005,23018] [2022-11-19 06:57:03,496 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23136,23149] [2022-11-19 06:57:03,497 WARN L234 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_97cd5caf-8e59-4154-807b-b9269e639684/sv-benchmarks/c/forester-heap/sll-sorted-2.i[23200,23213] [2022-11-19 06:57:03,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:57:03,528 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:57:03,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:03 WrapperNode [2022-11-19 06:57:03,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:57:03,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:57:03,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:57:03,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:57:03,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:03" (1/1) ... [2022-11-19 06:57:03,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:03" (1/1) ... [2022-11-19 06:57:03,620 INFO L138 Inliner]: procedures = 119, calls = 40, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 199 [2022-11-19 06:57:03,632 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:57:03,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:57:03,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:57:03,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:57:03,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:03" (1/1) ... [2022-11-19 06:57:03,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:03" (1/1) ... [2022-11-19 06:57:03,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:03" (1/1) ... [2022-11-19 06:57:03,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:03" (1/1) ... [2022-11-19 06:57:03,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:03" (1/1) ... [2022-11-19 06:57:03,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:03" (1/1) ... [2022-11-19 06:57:03,698 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:03" (1/1) ... [2022-11-19 06:57:03,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:03" (1/1) ... [2022-11-19 06:57:03,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:57:03,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:57:03,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:57:03,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:57:03,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:03" (1/1) ... [2022-11-19 06:57:03,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:57:03,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:03,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:57:03,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:57:03,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:57:03,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:57:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:57:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:57:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 06:57:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 06:57:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:57:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:57:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:57:03,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:57:03,976 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:57:03,979 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:57:04,719 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:57:04,823 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:57:04,824 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-11-19 06:57:04,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:57:04 BoogieIcfgContainer [2022-11-19 06:57:04,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:57:04,831 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:57:04,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:57:04,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:57:04,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:57:02" (1/3) ... [2022-11-19 06:57:04,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c0fbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:57:04, skipping insertion in model container [2022-11-19 06:57:04,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:57:03" (2/3) ... [2022-11-19 06:57:04,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c0fbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:57:04, skipping insertion in model container [2022-11-19 06:57:04,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:57:04" (3/3) ... [2022-11-19 06:57:04,839 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-sorted-2.i [2022-11-19 06:57:04,865 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:57:04,865 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 71 error locations. [2022-11-19 06:57:04,924 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:57:04,932 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;@85f76fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:57:04,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-11-19 06:57:04,937 INFO L276 IsEmpty]: Start isEmpty. Operand has 144 states, 72 states have (on average 2.4722222222222223) internal successors, (178), 143 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:04,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 06:57:04,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:04,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 06:57:04,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 06:57:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:04,953 INFO L85 PathProgramCache]: Analyzing trace with hash 12218, now seen corresponding path program 1 times [2022-11-19 06:57:04,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:04,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032959398] [2022-11-19 06:57:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:04,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:05,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:05,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032959398] [2022-11-19 06:57:05,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032959398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:05,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:05,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:57:05,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630162641] [2022-11-19 06:57:05,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:05,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:57:05,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:05,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:57:05,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:57:05,292 INFO L87 Difference]: Start difference. First operand has 144 states, 72 states have (on average 2.4722222222222223) internal successors, (178), 143 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:05,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:05,533 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2022-11-19 06:57:05,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:57:05,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-19 06:57:05,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:05,549 INFO L225 Difference]: With dead ends: 146 [2022-11-19 06:57:05,549 INFO L226 Difference]: Without dead ends: 144 [2022-11-19 06:57:05,551 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 [2022-11-19 06:57:05,556 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 138 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:05,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 86 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:57:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-19 06:57:05,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-11-19 06:57:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 140 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 150 transitions. [2022-11-19 06:57:05,633 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 150 transitions. Word has length 2 [2022-11-19 06:57:05,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:05,634 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 150 transitions. [2022-11-19 06:57:05,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 150 transitions. [2022-11-19 06:57:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 06:57:05,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:05,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 06:57:05,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:57:05,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 06:57:05,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:05,641 INFO L85 PathProgramCache]: Analyzing trace with hash 12219, now seen corresponding path program 1 times [2022-11-19 06:57:05,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:05,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406440988] [2022-11-19 06:57:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:05,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:05,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:05,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406440988] [2022-11-19 06:57:05,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406440988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:05,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:05,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:57:05,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600812375] [2022-11-19 06:57:05,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:05,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:57:05,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:05,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:57:05,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:57:05,854 INFO L87 Difference]: Start difference. First operand 141 states and 150 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:06,059 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2022-11-19 06:57:06,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:57:06,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-19 06:57:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:06,071 INFO L225 Difference]: With dead ends: 142 [2022-11-19 06:57:06,072 INFO L226 Difference]: Without dead ends: 142 [2022-11-19 06:57:06,072 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 [2022-11-19 06:57:06,074 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 135 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:06,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 86 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:57:06,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-19 06:57:06,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-11-19 06:57:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 138 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 148 transitions. [2022-11-19 06:57:06,097 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 148 transitions. Word has length 2 [2022-11-19 06:57:06,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:06,098 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 148 transitions. [2022-11-19 06:57:06,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:06,099 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 148 transitions. [2022-11-19 06:57:06,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:57:06,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:06,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:57:06,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:57:06,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 06:57:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:06,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1591596380, now seen corresponding path program 1 times [2022-11-19 06:57:06,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:06,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886259066] [2022-11-19 06:57:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:06,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:06,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:06,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886259066] [2022-11-19 06:57:06,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886259066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:06,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:06,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:57:06,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503336057] [2022-11-19 06:57:06,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:06,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:57:06,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:06,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:57:06,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:57:06,317 INFO L87 Difference]: Start difference. First operand 139 states and 148 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:06,575 INFO L93 Difference]: Finished difference Result 144 states and 156 transitions. [2022-11-19 06:57:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:57:06,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-19 06:57:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:06,577 INFO L225 Difference]: With dead ends: 144 [2022-11-19 06:57:06,578 INFO L226 Difference]: Without dead ends: 144 [2022-11-19 06:57:06,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:57:06,579 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 237 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:06,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 62 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:57:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-19 06:57:06,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2022-11-19 06:57:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 85 states have (on average 1.8235294117647058) internal successors, (155), 134 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 155 transitions. [2022-11-19 06:57:06,589 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 155 transitions. Word has length 6 [2022-11-19 06:57:06,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:06,590 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 155 transitions. [2022-11-19 06:57:06,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 155 transitions. [2022-11-19 06:57:06,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:57:06,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:06,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:57:06,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:57:06,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 06:57:06,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:06,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1591596379, now seen corresponding path program 1 times [2022-11-19 06:57:06,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:06,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507344890] [2022-11-19 06:57:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:06,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:06,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:06,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507344890] [2022-11-19 06:57:06,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507344890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:06,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:06,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:57:06,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456923510] [2022-11-19 06:57:06,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:06,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:57:06,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:06,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:57:06,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:57:06,788 INFO L87 Difference]: Start difference. First operand 135 states and 155 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:07,053 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2022-11-19 06:57:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:57:07,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-19 06:57:07,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:07,056 INFO L225 Difference]: With dead ends: 142 [2022-11-19 06:57:07,056 INFO L226 Difference]: Without dead ends: 142 [2022-11-19 06:57:07,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:57:07,058 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 134 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:07,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 135 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:57:07,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-19 06:57:07,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-11-19 06:57:07,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 89 states have (on average 1.797752808988764) internal successors, (160), 138 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:07,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 160 transitions. [2022-11-19 06:57:07,067 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 160 transitions. Word has length 6 [2022-11-19 06:57:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:07,095 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 160 transitions. [2022-11-19 06:57:07,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:07,096 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 160 transitions. [2022-11-19 06:57:07,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:57:07,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:07,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:07,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:57:07,097 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 06:57:07,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:07,098 INFO L85 PathProgramCache]: Analyzing trace with hash -515790745, now seen corresponding path program 1 times [2022-11-19 06:57:07,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:07,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779902268] [2022-11-19 06:57:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:07,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:07,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:07,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779902268] [2022-11-19 06:57:07,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779902268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:07,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:07,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:57:07,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119128310] [2022-11-19 06:57:07,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:07,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:57:07,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:07,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:57:07,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:57:07,185 INFO L87 Difference]: Start difference. First operand 139 states and 160 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:07,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:07,256 INFO L93 Difference]: Finished difference Result 169 states and 194 transitions. [2022-11-19 06:57:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:57:07,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 06:57:07,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:07,258 INFO L225 Difference]: With dead ends: 169 [2022-11-19 06:57:07,258 INFO L226 Difference]: Without dead ends: 169 [2022-11-19 06:57:07,259 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 [2022-11-19 06:57:07,263 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 91 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:07,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 156 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:57:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-19 06:57:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 141. [2022-11-19 06:57:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 91 states have (on average 1.7692307692307692) internal successors, (161), 140 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 161 transitions. [2022-11-19 06:57:07,290 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 161 transitions. Word has length 8 [2022-11-19 06:57:07,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:07,290 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 161 transitions. [2022-11-19 06:57:07,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:07,291 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 161 transitions. [2022-11-19 06:57:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:57:07,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:07,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:07,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:57:07,292 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 06:57:07,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:07,294 INFO L85 PathProgramCache]: Analyzing trace with hash -515426526, now seen corresponding path program 1 times [2022-11-19 06:57:07,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:07,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101172077] [2022-11-19 06:57:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:07,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:07,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:07,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101172077] [2022-11-19 06:57:07,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101172077] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:07,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:07,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:57:07,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168094044] [2022-11-19 06:57:07,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:07,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:57:07,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:07,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:57:07,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:57:07,530 INFO L87 Difference]: Start difference. First operand 141 states and 161 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:07,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:07,828 INFO L93 Difference]: Finished difference Result 146 states and 168 transitions. [2022-11-19 06:57:07,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:57:07,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 06:57:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:07,830 INFO L225 Difference]: With dead ends: 146 [2022-11-19 06:57:07,830 INFO L226 Difference]: Without dead ends: 146 [2022-11-19 06:57:07,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:57:07,831 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 86 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:07,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 207 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:57:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-19 06:57:07,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2022-11-19 06:57:07,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 91 states have (on average 1.7582417582417582) internal successors, (160), 139 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 160 transitions. [2022-11-19 06:57:07,838 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 160 transitions. Word has length 8 [2022-11-19 06:57:07,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:07,838 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 160 transitions. [2022-11-19 06:57:07,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:07,842 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 160 transitions. [2022-11-19 06:57:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:57:07,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:07,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:07,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:57:07,846 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 06:57:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:07,848 INFO L85 PathProgramCache]: Analyzing trace with hash -515426525, now seen corresponding path program 1 times [2022-11-19 06:57:07,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:07,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905739459] [2022-11-19 06:57:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:07,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:08,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:08,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905739459] [2022-11-19 06:57:08,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905739459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:08,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:08,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:57:08,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310377130] [2022-11-19 06:57:08,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:08,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:57:08,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:57:08,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:57:08,123 INFO L87 Difference]: Start difference. First operand 140 states and 160 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:08,412 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2022-11-19 06:57:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:57:08,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 06:57:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:08,414 INFO L225 Difference]: With dead ends: 135 [2022-11-19 06:57:08,414 INFO L226 Difference]: Without dead ends: 135 [2022-11-19 06:57:08,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:57:08,416 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 8 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:08,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 279 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:57:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-19 06:57:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2022-11-19 06:57:08,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 87 states have (on average 1.735632183908046) internal successors, (151), 130 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2022-11-19 06:57:08,423 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 8 [2022-11-19 06:57:08,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:08,423 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2022-11-19 06:57:08,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:08,424 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2022-11-19 06:57:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 06:57:08,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:08,425 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:08,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 06:57:08,427 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 06:57:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:08,427 INFO L85 PathProgramCache]: Analyzing trace with hash -971190285, now seen corresponding path program 1 times [2022-11-19 06:57:08,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:08,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478188018] [2022-11-19 06:57:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:08,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:57:08,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:08,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478188018] [2022-11-19 06:57:08,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478188018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:08,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:08,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:57:08,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036121042] [2022-11-19 06:57:08,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:08,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:57:08,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:08,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:57:08,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:57:08,519 INFO L87 Difference]: Start difference. First operand 131 states and 151 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2022-11-19 06:57:08,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:08,719 INFO L93 Difference]: Finished difference Result 211 states and 230 transitions. [2022-11-19 06:57:08,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:57:08,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 15 [2022-11-19 06:57:08,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:08,721 INFO L225 Difference]: With dead ends: 211 [2022-11-19 06:57:08,721 INFO L226 Difference]: Without dead ends: 211 [2022-11-19 06:57:08,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:57:08,722 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 276 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:08,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 129 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:57:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-19 06:57:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 131. [2022-11-19 06:57:08,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 88 states have (on average 1.7159090909090908) internal successors, (151), 130 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2022-11-19 06:57:08,726 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 15 [2022-11-19 06:57:08,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:08,727 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2022-11-19 06:57:08,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2022-11-19 06:57:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2022-11-19 06:57:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 06:57:08,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:08,728 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:08,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 06:57:08,728 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 06:57:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:08,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1305832451, now seen corresponding path program 1 times [2022-11-19 06:57:08,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:08,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645209732] [2022-11-19 06:57:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:08,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:09,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:09,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645209732] [2022-11-19 06:57:09,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645209732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:09,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945315389] [2022-11-19 06:57:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:09,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:09,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:09,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:09,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:57:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:09,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 06:57:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:09,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:09,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:57:09,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:57:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:09,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945315389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:09,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1764594270] [2022-11-19 06:57:09,687 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:57:09,687 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:09,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:09,699 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:09,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:09,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:09,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:09,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 06:57:09,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:57:09,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:09,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 06:57:09,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:57:09,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:09,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 06:57:09,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:09,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:57:09,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:09,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:57:09,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:09,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:09,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:09,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:09,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:09,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-19 06:57:10,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:57:10,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:57:10,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:57:10,181 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:57:10,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:57:10,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:57:10,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:10,244 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:57:10,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-19 06:57:10,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,310 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 06:57:10,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-19 06:57:10,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-19 06:57:10,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2022-11-19 06:57:10,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 52 [2022-11-19 06:57:10,541 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:57:10,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 134 treesize of output 93 [2022-11-19 06:57:10,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2022-11-19 06:57:10,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:57:10,717 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-19 06:57:10,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 120 [2022-11-19 06:57:10,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2022-11-19 06:57:10,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-11-19 06:57:10,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:10,959 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-19 06:57:10,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 447 treesize of output 368 [2022-11-19 06:57:10,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:11,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:11,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:11,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:11,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:11,062 INFO L321 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-11-19 06:57:11,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 441 treesize of output 443 [2022-11-19 06:57:11,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:11,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:11,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:11,107 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-19 06:57:11,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 439 treesize of output 409 [2022-11-19 06:57:11,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:11,610 INFO L321 Elim1Store]: treesize reduction 156, result has 13.8 percent of original size [2022-11-19 06:57:11,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 858 treesize of output 828 [2022-11-19 06:57:11,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:12,068 INFO L321 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2022-11-19 06:57:12,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1010 treesize of output 831 [2022-11-19 06:57:12,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:12,206 INFO L321 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2022-11-19 06:57:12,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 1010 treesize of output 952 [2022-11-19 06:57:12,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:12,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:12,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:12,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:12,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:12,433 INFO L321 Elim1Store]: treesize reduction 170, result has 17.1 percent of original size [2022-11-19 06:57:12,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 1007 treesize of output 965 [2022-11-19 06:57:13,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:13,240 INFO L321 Elim1Store]: treesize reduction 184, result has 15.2 percent of original size [2022-11-19 06:57:13,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 909 treesize of output 538 [2022-11-19 06:57:13,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:13,501 INFO L321 Elim1Store]: treesize reduction 196, result has 17.3 percent of original size [2022-11-19 06:57:13,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 884 treesize of output 741 [2022-11-19 06:57:13,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:13,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:13,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:13,821 INFO L321 Elim1Store]: treesize reduction 560, result has 10.7 percent of original size [2022-11-19 06:57:13,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 797 treesize of output 772 [2022-11-19 06:57:14,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:57:14,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:57:14,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:57:14,745 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:14,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:57:14,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:57:14,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:57:14,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 06:57:14,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:57:14,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:14,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 06:57:14,866 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:57:14,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2022-11-19 06:57:14,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:57:14,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:57:14,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:57:14,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:57:15,076 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:15,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:57:15,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:57:15,195 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 06:57:15,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 216 [2022-11-19 06:57:15,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:15,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:15,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:15,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:15,316 INFO L321 Elim1Store]: treesize reduction 76, result has 39.7 percent of original size [2022-11-19 06:57:15,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 217 treesize of output 240 [2022-11-19 06:57:15,367 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 06:57:15,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 206 [2022-11-19 06:57:15,959 INFO L321 Elim1Store]: treesize reduction 84, result has 35.4 percent of original size [2022-11-19 06:57:15,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 377 treesize of output 346 [2022-11-19 06:57:16,117 INFO L321 Elim1Store]: treesize reduction 84, result has 35.4 percent of original size [2022-11-19 06:57:16,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 329 treesize of output 346 [2022-11-19 06:57:16,310 INFO L321 Elim1Store]: treesize reduction 230, result has 19.0 percent of original size [2022-11-19 06:57:16,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 317 treesize of output 331 [2022-11-19 06:57:17,088 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:57:21,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2632#(and (not (<= (+ |ULTIMATE.start_main_~x~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~x~0#1.base|))) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (exists ((|v_ULTIMATE.start_main_~x~0#1.offset_126| Int) (|v_ULTIMATE.start_main_~x~0#1.base_150| Int)) (and (= 1 (select (select |#memory_int| |v_ULTIMATE.start_main_~x~0#1.base_150|) (+ 4 |v_ULTIMATE.start_main_~x~0#1.offset_126|))) (<= 0 |v_ULTIMATE.start_main_~x~0#1.offset_126|) (= (select |#valid| |v_ULTIMATE.start_main_~x~0#1.base_150|) 1) (<= (+ 8 |v_ULTIMATE.start_main_~x~0#1.offset_126|) (select |#length| |v_ULTIMATE.start_main_~x~0#1.base_150|)))) (= |ULTIMATE.start_main_~marked~0#1| 0) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:57:21,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:57:21,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:21,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-11-19 06:57:21,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350988804] [2022-11-19 06:57:21,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:57:21,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 06:57:21,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:57:21,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 06:57:21,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-19 06:57:21,158 INFO L87 Difference]: Start difference. First operand 131 states and 151 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:21,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:21,559 INFO L93 Difference]: Finished difference Result 193 states and 212 transitions. [2022-11-19 06:57:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:57:21,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 06:57:21,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:21,561 INFO L225 Difference]: With dead ends: 193 [2022-11-19 06:57:21,561 INFO L226 Difference]: Without dead ends: 193 [2022-11-19 06:57:21,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2022-11-19 06:57:21,562 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 424 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:21,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 228 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:57:21,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-19 06:57:21,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 150. [2022-11-19 06:57:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 113 states have (on average 1.6283185840707965) internal successors, (184), 149 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2022-11-19 06:57:21,568 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 17 [2022-11-19 06:57:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:21,569 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2022-11-19 06:57:21,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:57:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2022-11-19 06:57:21,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 06:57:21,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:21,571 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:57:21,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 06:57:21,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:21,777 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 06:57:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:21,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1767732735, now seen corresponding path program 1 times [2022-11-19 06:57:21,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:57:21,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672776017] [2022-11-19 06:57:21,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:21,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:57:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:22,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:57:22,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672776017] [2022-11-19 06:57:22,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672776017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:22,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813598237] [2022-11-19 06:57:22,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:22,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:22,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:22,360 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:22,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:57:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:22,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 06:57:22,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:22,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:57:22,610 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:22,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:57:22,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:57:22,783 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:57:22,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-19 06:57:22,831 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:57:22,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-19 06:57:23,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:23,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 06:57:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:23,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:25,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:57:25,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-19 06:57:25,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:57:25,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-19 06:57:25,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-19 06:57:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:30,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813598237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:30,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1336646649] [2022-11-19 06:57:30,069 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-19 06:57:30,069 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:57:30,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:57:30,070 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:57:30,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:57:30,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 06:57:30,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:57:30,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 06:57:30,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:57:30,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:57:30,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 06:57:30,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:57:30,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-19 06:57:30,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:57:30,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:57:30,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:57:30,327 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:57:30,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:57:30,352 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:57:30,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-19 06:57:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:57:30,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,417 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 06:57:30,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-19 06:57:30,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 06:57:30,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-19 06:57:30,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-19 06:57:30,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:57:30,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:57:30,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2022-11-19 06:57:30,701 INFO L321 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2022-11-19 06:57:30,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 252 treesize of output 149 [2022-11-19 06:57:30,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,767 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:57:30,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 199 treesize of output 156 [2022-11-19 06:57:30,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 53 [2022-11-19 06:57:30,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,936 INFO L321 Elim1Store]: treesize reduction 91, result has 10.8 percent of original size [2022-11-19 06:57:30,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 543 treesize of output 400 [2022-11-19 06:57:30,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:30,988 INFO L321 Elim1Store]: treesize reduction 91, result has 10.8 percent of original size [2022-11-19 06:57:30,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 543 treesize of output 480 [2022-11-19 06:57:31,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:31,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:31,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:31,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:31,069 INFO L321 Elim1Store]: treesize reduction 132, result has 21.0 percent of original size [2022-11-19 06:57:31,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 537 treesize of output 539 [2022-11-19 06:57:31,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:31,477 INFO L321 Elim1Store]: treesize reduction 310, result has 11.9 percent of original size [2022-11-19 06:57:31,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 1044 treesize of output 991 [2022-11-19 06:57:31,790 INFO L321 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2022-11-19 06:57:31,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1304 treesize of output 913 [2022-11-19 06:57:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:31,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:31,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:31,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:31,992 INFO L321 Elim1Store]: treesize reduction 244, result has 14.4 percent of original size [2022-11-19 06:57:31,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 1117 treesize of output 1075 [2022-11-19 06:57:32,089 INFO L321 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2022-11-19 06:57:32,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1127 treesize of output 1048 [2022-11-19 06:57:32,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:32,612 INFO L321 Elim1Store]: treesize reduction 180, result has 17.1 percent of original size [2022-11-19 06:57:32,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 1004 treesize of output 565 [2022-11-19 06:57:32,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:32,780 INFO L321 Elim1Store]: treesize reduction 204, result has 13.9 percent of original size [2022-11-19 06:57:32,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 883 treesize of output 740 [2022-11-19 06:57:32,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:32,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:32,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:57:33,033 INFO L321 Elim1Store]: treesize reduction 560, result has 10.7 percent of original size [2022-11-19 06:57:33,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 772 treesize of output 747 [2022-11-19 06:57:33,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:57:33,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:57:33,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:57:33,855 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:57:33,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 06:57:33,884 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:33,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:57:33,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:57:33,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 06:57:33,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:57:33,956 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:57:33,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2022-11-19 06:57:33,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:33,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:57:33,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:33,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 06:57:34,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:57:34,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:57:34,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:57:34,183 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:57:34,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 06:57:34,217 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:57:34,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:57:34,311 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 06:57:34,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 209 [2022-11-19 06:57:34,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:34,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:34,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:34,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:34,419 INFO L321 Elim1Store]: treesize reduction 76, result has 39.7 percent of original size [2022-11-19 06:57:34,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 242 treesize of output 265 [2022-11-19 06:57:34,481 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 06:57:34,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 231 [2022-11-19 06:57:35,378 INFO L321 Elim1Store]: treesize reduction 142, result has 27.9 percent of original size [2022-11-19 06:57:35,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 823 treesize of output 721 [2022-11-19 06:57:35,573 INFO L321 Elim1Store]: treesize reduction 142, result has 27.9 percent of original size [2022-11-19 06:57:35,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 731 treesize of output 717 [2022-11-19 06:57:35,856 INFO L321 Elim1Store]: treesize reduction 306, result has 20.1 percent of original size [2022-11-19 06:57:35,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 691 treesize of output 702 [2022-11-19 06:57:58,172 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:58:02,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3132#(and (not (= (select |#valid| |ULTIMATE.start_main_#t~mem7#1.base|) 1)) (or (not (= |ULTIMATE.start_main_#t~mem6#1.base| 0)) (not (= |ULTIMATE.start_main_#t~mem6#1.offset| 0))) (<= (+ |ULTIMATE.start_main_~x~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~x~0#1.base|)) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) |ULTIMATE.start_main_#t~mem6#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) |ULTIMATE.start_main_#t~mem7#1.offset|) (= |ULTIMATE.start_main_~marked~0#1| 0) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~x~0#1.base|) 1) |ULTIMATE.start_main_#t~short9#1| (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (= |ULTIMATE.start_main_#t~mem7#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (<= 0 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1.base_160| Int) (|v_ULTIMATE.start_main_~x~0#1.offset_135| Int)) (and (= (select |#valid| |v_ULTIMATE.start_main_~x~0#1.base_160|) 1) (<= 0 |v_ULTIMATE.start_main_~x~0#1.offset_135|) (<= (+ 8 |v_ULTIMATE.start_main_~x~0#1.offset_135|) (select |#length| |v_ULTIMATE.start_main_~x~0#1.base_160|)) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~x~0#1.base_160|) (+ 4 |v_ULTIMATE.start_main_~x~0#1.offset_135|)) 1))) (= |#NULL.base| 0))' at error location [2022-11-19 06:58:02,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:58:02,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:58:02,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2022-11-19 06:58:02,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681347525] [2022-11-19 06:58:02,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:02,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 06:58:02,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:58:02,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 06:58:02,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1680, Unknown=4, NotChecked=0, Total=1892 [2022-11-19 06:58:02,218 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:03,270 INFO L93 Difference]: Finished difference Result 291 states and 333 transitions. [2022-11-19 06:58:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:58:03,271 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-19 06:58:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:03,272 INFO L225 Difference]: With dead ends: 291 [2022-11-19 06:58:03,272 INFO L226 Difference]: Without dead ends: 291 [2022-11-19 06:58:03,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=289, Invalid=2059, Unknown=4, NotChecked=0, Total=2352 [2022-11-19 06:58:03,274 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 349 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:03,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1024 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 704 Invalid, 0 Unknown, 597 Unchecked, 0.8s Time] [2022-11-19 06:58:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-19 06:58:03,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 177. [2022-11-19 06:58:03,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 140 states have (on average 1.5785714285714285) internal successors, (221), 176 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 221 transitions. [2022-11-19 06:58:03,280 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 221 transitions. Word has length 20 [2022-11-19 06:58:03,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:03,280 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 221 transitions. [2022-11-19 06:58:03,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:58:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 221 transitions. [2022-11-19 06:58:03,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 06:58:03,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:03,281 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:58:03,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:03,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:58:03,482 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 06:58:03,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:03,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1767732736, now seen corresponding path program 1 times [2022-11-19 06:58:03,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:58:03,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276367207] [2022-11-19 06:58:03,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:03,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:58:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:58:04,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:58:04,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276367207] [2022-11-19 06:58:04,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276367207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:04,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079373802] [2022-11-19 06:58:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:04,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:04,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:04,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:04,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:58:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:04,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-19 06:58:04,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:04,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:58:04,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:58:04,306 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 06:58:04,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 06:58:04,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:58:04,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:58:04,453 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:58:04,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 06:58:04,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 06:58:04,473 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:58:04,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-19 06:58:04,528 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:58:04,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-19 06:58:04,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-19 06:58:04,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:04,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 06:58:04,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:04,735 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:58:04,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-11-19 06:58:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:58:04,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:05,434 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:58:05,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-19 06:58:05,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:58:05,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-19 06:58:05,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-19 06:58:05,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:58:05,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-11-19 06:58:05,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:58:05,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-19 06:58:05,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:05,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-19 06:58:05,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:05,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-11-19 06:58:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:58:05,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079373802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:05,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [464982351] [2022-11-19 06:58:05,880 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-19 06:58:05,880 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:58:05,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:58:05,880 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:58:05,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:58:05,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 06:58:05,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:58:05,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:58:05,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 06:58:05,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:58:05,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:05,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:58:06,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 06:58:06,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-19 06:58:06,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:58:06,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:58:06,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:58:06,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,157 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-19 06:58:06,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-11-19 06:58:06,193 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:58:06,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-19 06:58:06,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:58:06,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-19 06:58:06,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 06:58:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 06:58:06,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-19 06:58:06,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:58:06,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-19 06:58:06,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:58:06,431 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-19 06:58:06,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 120 [2022-11-19 06:58:06,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2022-11-19 06:58:06,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-11-19 06:58:06,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:58:06,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:58:06,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:58:06,567 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:06,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:58:06,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:58:06,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 06:58:06,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:58:06,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:58:06,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:06,649 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:58:06,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2022-11-19 06:58:06,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:58:06,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 06:58:06,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:58:06,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:58:06,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:58:06,838 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:58:06,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 06:58:06,866 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:58:06,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:58:06,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:06,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:06,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:06,964 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-11-19 06:58:06,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 217 [2022-11-19 06:58:06,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:06,999 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 06:58:07,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 211 [2022-11-19 06:58:07,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:58:07,036 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 06:58:07,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 215 [2022-11-19 06:58:07,782 INFO L321 Elim1Store]: treesize reduction 188, result has 25.4 percent of original size [2022-11-19 06:58:07,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 866 treesize of output 753 [2022-11-19 06:58:08,017 INFO L321 Elim1Store]: treesize reduction 188, result has 25.4 percent of original size [2022-11-19 06:58:08,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 694 treesize of output 697 [2022-11-19 06:58:08,162 INFO L321 Elim1Store]: treesize reduction 254, result has 16.2 percent of original size [2022-11-19 06:58:08,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 642 treesize of output 625 [2022-11-19 06:59:42,646 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-19 06:59:43,952 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-19 06:59:45,454 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:59:49,429 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3772#(and (or (not (= |ULTIMATE.start_main_#t~mem6#1.base| 0)) (not (= |ULTIMATE.start_main_#t~mem6#1.offset| 0))) (<= (+ |ULTIMATE.start_main_~x~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~x~0#1.base|)) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) |ULTIMATE.start_main_#t~mem6#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) |ULTIMATE.start_main_#t~mem7#1.offset|) (= |ULTIMATE.start_main_~marked~0#1| 0) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (exists ((|v_ULTIMATE.start_main_~x~0#1.base_169| Int)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_main_~x~0#1.base_169|) 4) 1) (= (select |#valid| |v_ULTIMATE.start_main_~x~0#1.base_169|) 1) (<= 8 (select |#length| |v_ULTIMATE.start_main_~x~0#1.base_169|)))) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~x~0#1.base|) 1) |ULTIMATE.start_main_#t~short9#1| (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (= |ULTIMATE.start_main_#t~mem7#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (<= 0 |#StackHeapBarrier|) (or (not (<= (+ |ULTIMATE.start_main_#t~mem7#1.offset| 8) (select |#length| |ULTIMATE.start_main_#t~mem7#1.base|))) (not (<= 0 (+ |ULTIMATE.start_main_#t~mem7#1.offset| 4)))) (= |#NULL.base| 0))' at error location [2022-11-19 06:59:49,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:59:49,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:59:49,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2022-11-19 06:59:49,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060772393] [2022-11-19 06:59:49,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:49,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 06:59:49,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:49,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 06:59:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1869, Unknown=2, NotChecked=0, Total=2070 [2022-11-19 06:59:49,432 INFO L87 Difference]: Start difference. First operand 177 states and 221 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:52,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:52,129 INFO L93 Difference]: Finished difference Result 343 states and 389 transitions. [2022-11-19 06:59:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 06:59:52,131 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-19 06:59:52,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:52,133 INFO L225 Difference]: With dead ends: 343 [2022-11-19 06:59:52,134 INFO L226 Difference]: Without dead ends: 343 [2022-11-19 06:59:52,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=416, Invalid=3242, Unknown=2, NotChecked=0, Total=3660 [2022-11-19 06:59:52,135 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1188 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 2017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:52,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1188 Valid, 976 Invalid, 2017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1393 Invalid, 0 Unknown, 547 Unchecked, 1.3s Time] [2022-11-19 06:59:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-19 06:59:52,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 177. [2022-11-19 06:59:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 140 states have (on average 1.5714285714285714) internal successors, (220), 176 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 220 transitions. [2022-11-19 06:59:52,143 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 220 transitions. Word has length 20 [2022-11-19 06:59:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:52,143 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 220 transitions. [2022-11-19 06:59:52,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 220 transitions. [2022-11-19 06:59:52,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 06:59:52,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:52,145 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:52,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:52,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:52,351 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 06:59:52,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:52,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1767741834, now seen corresponding path program 1 times [2022-11-19 06:59:52,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:52,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723632547] [2022-11-19 06:59:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:52,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:59:52,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:52,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723632547] [2022-11-19 06:59:52,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723632547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:52,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:52,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:59:52,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102157138] [2022-11-19 06:59:52,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:52,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:59:52,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:52,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:59:52,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:59:52,409 INFO L87 Difference]: Start difference. First operand 177 states and 220 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:52,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:52,454 INFO L93 Difference]: Finished difference Result 180 states and 223 transitions. [2022-11-19 06:59:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:59:52,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-19 06:59:52,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:52,456 INFO L225 Difference]: With dead ends: 180 [2022-11-19 06:59:52,456 INFO L226 Difference]: Without dead ends: 180 [2022-11-19 06:59:52,457 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 [2022-11-19 06:59:52,458 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:52,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 191 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:59:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-19 06:59:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-11-19 06:59:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 143 states have (on average 1.5594405594405594) internal successors, (223), 179 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 223 transitions. [2022-11-19 06:59:52,466 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 223 transitions. Word has length 20 [2022-11-19 06:59:52,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:52,469 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 223 transitions. [2022-11-19 06:59:52,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:52,469 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 223 transitions. [2022-11-19 06:59:52,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 06:59:52,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:52,472 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:52,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 06:59:52,472 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 06:59:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2015615776, now seen corresponding path program 1 times [2022-11-19 06:59:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:52,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248569599] [2022-11-19 06:59:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:52,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:59:52,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:52,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248569599] [2022-11-19 06:59:52,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248569599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:52,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506913927] [2022-11-19 06:59:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:52,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:52,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:52,858 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:52,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:59:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:52,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 06:59:52,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:52,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:59:53,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 06:59:53,053 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 06:59:53,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 06:59:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:59:53,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:53,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-19 06:59:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:59:53,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506913927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:53,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697471224] [2022-11-19 06:59:53,363 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 06:59:53,363 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:53,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:53,364 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:53,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:53,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 06:59:53,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:59:53,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:59:53,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 06:59:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:59:53,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:59:53,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 06:59:53,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-19 06:59:53,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:59:53,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:59:53,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:59:53,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,616 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-19 06:59:53,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-11-19 06:59:53,642 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:59:53,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:59:53,673 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:59:53,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-19 06:59:53,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 06:59:53,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 06:59:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-19 06:59:53,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-19 06:59:53,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:59:53,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-19 06:59:53,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:53,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:59:53,982 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-19 06:59:53,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 120 [2022-11-19 06:59:54,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-11-19 06:59:54,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2022-11-19 06:59:54,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:59:54,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:59:54,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:59:54,117 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:54,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:59:54,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:59:54,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:59:54,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:59:54,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 06:59:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:59:54,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 06:59:54,208 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:59:54,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2022-11-19 06:59:54,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:59:54,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:59:54,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:59:54,397 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:59:54,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:59:54,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:59:54,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:54,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:54,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:54,477 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-11-19 06:59:54,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 217 [2022-11-19 06:59:54,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:54,518 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 06:59:54,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 211 [2022-11-19 06:59:54,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:54,550 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 06:59:54,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 215 [2022-11-19 06:59:55,624 INFO L321 Elim1Store]: treesize reduction 188, result has 25.4 percent of original size [2022-11-19 06:59:55,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 1297 treesize of output 1108 [2022-11-19 06:59:55,819 INFO L321 Elim1Store]: treesize reduction 260, result has 14.2 percent of original size [2022-11-19 06:59:55,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 1053 treesize of output 1006 [2022-11-19 06:59:56,051 INFO L321 Elim1Store]: treesize reduction 188, result has 25.4 percent of original size [2022-11-19 06:59:56,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 1035 treesize of output 1006 [2022-11-19 07:03:10,665 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:04:34,551 WARN L233 SmtUtils]: Spent 1.25m on a formula simplification. DAG size of input: 2663 DAG size of output: 140 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:04:35,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4853#(and (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 4)) 0) (<= 0 (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 4)) (< (select |#length| |ULTIMATE.start_main_~x~0#1.base|) (+ 8 |ULTIMATE.start_main_~x~0#1.offset|)) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 0))) (<= (+ |ULTIMATE.start_main_~x~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~x~0#1.base|)) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~marked~0#1| 0) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~x~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~x~0#1.base_177| Int)) (and (= 1 (select |#valid| |v_ULTIMATE.start_main_~x~0#1.base_177|)) (<= 8 (select |#length| |v_ULTIMATE.start_main_~x~0#1.base_177|)) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~x~0#1.base_177|) 4) 1))) (<= (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 8) (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|))) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (<= 0 |#StackHeapBarrier|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) 1) (= |#NULL.base| 0))' at error location [2022-11-19 07:04:35,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:04:35,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:04:35,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2022-11-19 07:04:35,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735512602] [2022-11-19 07:04:35,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:04:35,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:04:35,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:35,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:04:35,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:04:35,821 INFO L87 Difference]: Start difference. First operand 180 states and 223 transitions. Second operand has 16 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:36,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:36,345 INFO L93 Difference]: Finished difference Result 214 states and 240 transitions. [2022-11-19 07:04:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:04:36,345 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2022-11-19 07:04:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:36,346 INFO L225 Difference]: With dead ends: 214 [2022-11-19 07:04:36,346 INFO L226 Difference]: Without dead ends: 214 [2022-11-19 07:04:36,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 85.5s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:04:36,349 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 763 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 763 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:36,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [763 Valid, 192 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:04:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-19 07:04:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 179. [2022-11-19 07:04:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 144 states have (on average 1.4861111111111112) internal successors, (214), 178 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:36,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2022-11-19 07:04:36,353 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 22 [2022-11-19 07:04:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:36,354 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2022-11-19 07:04:36,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2022-11-19 07:04:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 07:04:36,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:36,355 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:36,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:04:36,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:04:36,563 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 07:04:36,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:36,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2085481638, now seen corresponding path program 1 times [2022-11-19 07:04:36,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:36,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763972171] [2022-11-19 07:04:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:36,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:04:36,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:36,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763972171] [2022-11-19 07:04:36,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763972171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:36,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:36,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:04:36,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666078126] [2022-11-19 07:04:36,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:36,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:04:36,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:36,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:04:36,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:04:36,701 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:36,886 INFO L93 Difference]: Finished difference Result 191 states and 228 transitions. [2022-11-19 07:04:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:04:36,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-19 07:04:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:36,887 INFO L225 Difference]: With dead ends: 191 [2022-11-19 07:04:36,887 INFO L226 Difference]: Without dead ends: 191 [2022-11-19 07:04:36,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:04:36,888 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 16 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:36,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 285 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:04:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-19 07:04:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 182. [2022-11-19 07:04:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 147 states have (on average 1.4761904761904763) internal successors, (217), 181 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 217 transitions. [2022-11-19 07:04:36,893 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 217 transitions. Word has length 23 [2022-11-19 07:04:36,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:36,893 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 217 transitions. [2022-11-19 07:04:36,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:36,894 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 217 transitions. [2022-11-19 07:04:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 07:04:36,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:36,895 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:36,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:04:36,895 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 07:04:36,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:36,895 INFO L85 PathProgramCache]: Analyzing trace with hash -2085489583, now seen corresponding path program 1 times [2022-11-19 07:04:36,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:36,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822619122] [2022-11-19 07:04:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:36,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:04:36,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:36,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822619122] [2022-11-19 07:04:36,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822619122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:36,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:36,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:04:36,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73970431] [2022-11-19 07:04:36,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:36,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:04:36,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:36,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:04:36,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:04:36,994 INFO L87 Difference]: Start difference. First operand 182 states and 217 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 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) [2022-11-19 07:04:37,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:37,086 INFO L93 Difference]: Finished difference Result 179 states and 212 transitions. [2022-11-19 07:04:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:04:37,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 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 23 [2022-11-19 07:04:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:37,088 INFO L225 Difference]: With dead ends: 179 [2022-11-19 07:04:37,088 INFO L226 Difference]: Without dead ends: 179 [2022-11-19 07:04:37,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:04:37,089 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 64 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:37,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 100 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-19 07:04:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-11-19 07:04:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 147 states have (on average 1.4421768707482994) internal successors, (212), 178 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 212 transitions. [2022-11-19 07:04:37,093 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 212 transitions. Word has length 23 [2022-11-19 07:04:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:37,093 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 212 transitions. [2022-11-19 07:04:37,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 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) [2022-11-19 07:04:37,093 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 212 transitions. [2022-11-19 07:04:37,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 07:04:37,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:37,094 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:37,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:04:37,094 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 07:04:37,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:37,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2085489584, now seen corresponding path program 1 times [2022-11-19 07:04:37,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:37,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113316710] [2022-11-19 07:04:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:37,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:04:37,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:37,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113316710] [2022-11-19 07:04:37,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113316710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:04:37,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:04:37,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:04:37,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709021688] [2022-11-19 07:04:37,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:04:37,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:04:37,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:04:37,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:04:37,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:04:37,155 INFO L87 Difference]: Start difference. First operand 179 states and 212 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 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) [2022-11-19 07:04:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:04:37,244 INFO L93 Difference]: Finished difference Result 177 states and 207 transitions. [2022-11-19 07:04:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:04:37,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 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 23 [2022-11-19 07:04:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:04:37,246 INFO L225 Difference]: With dead ends: 177 [2022-11-19 07:04:37,246 INFO L226 Difference]: Without dead ends: 177 [2022-11-19 07:04:37,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:04:37,246 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 54 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:04:37,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 111 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:04:37,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-19 07:04:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-11-19 07:04:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 147 states have (on average 1.4081632653061225) internal successors, (207), 175 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:04:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 207 transitions. [2022-11-19 07:04:37,252 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 207 transitions. Word has length 23 [2022-11-19 07:04:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:04:37,252 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 207 transitions. [2022-11-19 07:04:37,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 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) [2022-11-19 07:04:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 207 transitions. [2022-11-19 07:04:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 07:04:37,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:04:37,258 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:04:37,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:04:37,259 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-19 07:04:37,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:04:37,259 INFO L85 PathProgramCache]: Analyzing trace with hash 23491263, now seen corresponding path program 1 times [2022-11-19 07:04:37,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:04:37,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109519993] [2022-11-19 07:04:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:37,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:04:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:38,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:04:38,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109519993] [2022-11-19 07:04:38,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109519993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:04:38,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830718203] [2022-11-19 07:04:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:04:38,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:04:38,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:04:38,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:04:38,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97cd5caf-8e59-4154-807b-b9269e639684/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:04:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:04:38,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 07:04:38,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:04:38,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:04:38,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:04:38,365 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:04:38,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 07:04:38,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:04:38,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:38,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 07:04:38,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-19 07:04:38,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:04:38,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-19 07:04:38,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:38,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:38,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-19 07:04:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:38,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:04:39,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:39,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:39,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2022-11-19 07:04:39,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:04:39,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2022-11-19 07:04:39,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:04:39,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:04:39,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830718203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:04:39,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1079631418] [2022-11-19 07:04:39,409 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 07:04:39,410 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:04:39,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:04:39,410 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:04:39,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:04:39,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 07:04:39,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:04:39,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:04:39,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 07:04:39,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 07:04:39,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 07:04:39,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 07:04:39,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-19 07:04:39,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:04:39,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 07:04:39,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 07:04:39,661 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:04:39,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 07:04:39,686 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:04:39,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-19 07:04:39,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 07:04:39,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,744 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:04:39,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-19 07:04:39,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 07:04:39,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-19 07:04:39,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 52 [2022-11-19 07:04:39,883 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:04:39,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 07:04:39,916 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:04:39,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 134 treesize of output 93 [2022-11-19 07:04:39,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:39,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 45 [2022-11-19 07:04:40,019 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-19 07:04:40,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 120 [2022-11-19 07:04:40,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-11-19 07:04:40,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2022-11-19 07:04:40,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:40,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:40,151 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-19 07:04:40,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 442 treesize of output 367 [2022-11-19 07:04:40,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:40,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:40,206 INFO L321 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2022-11-19 07:04:40,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 436 treesize of output 438 [2022-11-19 07:04:40,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:40,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:40,240 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-19 07:04:40,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 434 treesize of output 416 [2022-11-19 07:04:40,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,559 INFO L321 Elim1Store]: treesize reduction 156, result has 13.8 percent of original size [2022-11-19 07:04:40,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 848 treesize of output 814 [2022-11-19 07:04:40,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:40,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:40,846 INFO L321 Elim1Store]: treesize reduction 44, result has 38.0 percent of original size [2022-11-19 07:04:40,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 1000 treesize of output 829 [2022-11-19 07:04:40,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:40,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:40,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:40,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:40,916 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-19 07:04:40,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1013 treesize of output 971 [2022-11-19 07:04:40,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:40,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:41,018 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-19 07:04:41,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 1000 treesize of output 966 [2022-11-19 07:04:41,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:41,533 INFO L321 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2022-11-19 07:04:41,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 819 treesize of output 513 [2022-11-19 07:04:41,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:41,686 INFO L321 Elim1Store]: treesize reduction 196, result has 14.4 percent of original size [2022-11-19 07:04:41,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 830 treesize of output 720 [2022-11-19 07:04:41,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:41,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:41,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:04:41,929 INFO L321 Elim1Store]: treesize reduction 416, result has 14.6 percent of original size [2022-11-19 07:04:41,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 771 treesize of output 760 [2022-11-19 07:04:42,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:04:42,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:04:42,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:04:42,733 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:04:42,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:04:42,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:04:42,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 07:04:42,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:04:42,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 07:04:42,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:42,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 07:04:42,828 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:04:42,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 39 [2022-11-19 07:04:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:42,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 07:04:42,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:04:42,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:04:42,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 07:04:43,059 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:04:43,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:04:43,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 07:04:43,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:43,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:43,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:43,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:04:43,217 INFO L321 Elim1Store]: treesize reduction 76, result has 39.7 percent of original size [2022-11-19 07:04:43,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 213 treesize of output 236 [2022-11-19 07:04:43,272 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 07:04:43,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 202 [2022-11-19 07:04:43,325 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 07:04:43,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 206 [2022-11-19 07:04:45,170 INFO L321 Elim1Store]: treesize reduction 180, result has 32.3 percent of original size [2022-11-19 07:04:45,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 925 treesize of output 834 [2022-11-19 07:04:45,469 INFO L321 Elim1Store]: treesize reduction 372, result has 18.4 percent of original size [2022-11-19 07:04:45,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 817 treesize of output 841 [2022-11-19 07:04:45,751 INFO L321 Elim1Store]: treesize reduction 180, result has 32.3 percent of original size [2022-11-19 07:04:45,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 803 treesize of output 800 [2022-11-19 07:07:24,470 WARN L233 SmtUtils]: Spent 7.45s on a formula simplification that was a NOOP. DAG size: 2154 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:10:46,761 WARN L233 SmtUtils]: Spent 18.24s on a formula simplification. DAG size of input: 3397 DAG size of output: 3397 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:11:00,159 WARN L233 SmtUtils]: Spent 7.63s on a formula simplification. DAG size of input: 1674 DAG size of output: 1674 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)