./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/forester-heap/sll-queue-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 4e7fbc69 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_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-queue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af4a0e4f738e916feae01fb2c2f056f4ba7834b8a7b8d69765614c5417c16c63 --- 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-4e7fbc6 [2022-11-23 15:24:52,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:24:52,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:24:52,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:24:52,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:24:52,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:24:52,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:24:52,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:24:52,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:24:52,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:24:52,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:24:52,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:24:52,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:24:52,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:24:52,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:24:52,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:24:52,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:24:52,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:24:52,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:24:52,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:24:52,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:24:52,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:24:52,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:24:52,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:24:52,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:24:52,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:24:52,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:24:52,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:24:52,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:24:52,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:24:52,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:24:52,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:24:52,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:24:52,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:24:52,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:24:52,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:24:52,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:24:52,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:24:52,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:24:52,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:24:52,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:24:52,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2022-11-23 15:24:52,626 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:24:52,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:24:52,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:24:52,627 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:24:52,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:24:52,628 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:24:52,628 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:24:52,628 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:24:52,629 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:24:52,629 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:24:52,630 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:24:52,630 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:24:52,630 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:24:52,630 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:24:52,631 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:24:52,631 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:24:52,631 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:24:52,631 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:24:52,632 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 15:24:52,632 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 15:24:52,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:24:52,632 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:24:52,633 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:24:52,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:24:52,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:24:52,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:24:52,634 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 15:24:52,634 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 15:24:52,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:24:52,635 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:24:52,635 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:24:52,635 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:24:52,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:24:52,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:24:52,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:24:52,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:24:52,636 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:24:52,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:24:52,636 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:24:52,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:24:52,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:24:52,637 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_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af4a0e4f738e916feae01fb2c2f056f4ba7834b8a7b8d69765614c5417c16c63 [2022-11-23 15:24:52,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:24:52,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:24:52,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:24:52,974 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:24:52,974 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:24:52,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/forester-heap/sll-queue-2.i [2022-11-23 15:24:55,976 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:24:56,245 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:24:56,246 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i [2022-11-23 15:24:56,257 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/data/83e86cc35/7f4b21812dee47ab87c45f5c48e54d31/FLAG09f25bd6c [2022-11-23 15:24:56,278 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/data/83e86cc35/7f4b21812dee47ab87c45f5c48e54d31 [2022-11-23 15:24:56,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:24:56,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:24:56,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:24:56,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:24:56,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:24:56,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:24:56" (1/1) ... [2022-11-23 15:24:56,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f60cd33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56, skipping insertion in model container [2022-11-23 15:24:56,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:24:56" (1/1) ... [2022-11-23 15:24:56,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:24:56,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:24:56,639 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22387,22400] [2022-11-23 15:24:56,645 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22458,22471] [2022-11-23 15:24:56,646 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22532,22545] [2022-11-23 15:24:56,647 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22624,22637] [2022-11-23 15:24:56,648 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22701,22714] [2022-11-23 15:24:56,649 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22796,22809] [2022-11-23 15:24:56,650 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22873,22886] [2022-11-23 15:24:56,651 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22956,22969] [2022-11-23 15:24:56,652 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[23051,23064] [2022-11-23 15:24:56,653 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[23128,23141] [2022-11-23 15:24:56,654 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[23211,23224] [2022-11-23 15:24:56,655 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[23300,23313] [2022-11-23 15:24:56,657 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[23386,23399] [2022-11-23 15:24:56,658 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[23532,23545] [2022-11-23 15:24:56,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:24:56,673 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:24:56,709 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22387,22400] [2022-11-23 15:24:56,710 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22458,22471] [2022-11-23 15:24:56,711 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22532,22545] [2022-11-23 15:24:56,712 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22624,22637] [2022-11-23 15:24:56,713 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22701,22714] [2022-11-23 15:24:56,714 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22796,22809] [2022-11-23 15:24:56,715 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22873,22886] [2022-11-23 15:24:56,716 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[22956,22969] [2022-11-23 15:24:56,717 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[23051,23064] [2022-11-23 15:24:56,718 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[23128,23141] [2022-11-23 15:24:56,719 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[23211,23224] [2022-11-23 15:24:56,720 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[23300,23313] [2022-11-23 15:24:56,722 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[23386,23399] [2022-11-23 15:24:56,723 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/sv-benchmarks/c/forester-heap/sll-queue-2.i[23532,23545] [2022-11-23 15:24:56,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:24:56,752 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:24:56,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56 WrapperNode [2022-11-23 15:24:56,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:24:56,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:24:56,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:24:56,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:24:56,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56" (1/1) ... [2022-11-23 15:24:56,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56" (1/1) ... [2022-11-23 15:24:56,801 INFO L138 Inliner]: procedures = 119, calls = 35, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 222 [2022-11-23 15:24:56,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:24:56,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:24:56,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:24:56,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:24:56,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56" (1/1) ... [2022-11-23 15:24:56,813 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56" (1/1) ... [2022-11-23 15:24:56,817 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56" (1/1) ... [2022-11-23 15:24:56,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56" (1/1) ... [2022-11-23 15:24:56,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56" (1/1) ... [2022-11-23 15:24:56,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56" (1/1) ... [2022-11-23 15:24:56,838 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56" (1/1) ... [2022-11-23 15:24:56,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56" (1/1) ... [2022-11-23 15:24:56,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:24:56,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:24:56,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:24:56,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:24:56,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56" (1/1) ... [2022-11-23 15:24:56,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:24:56,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:24:56,878 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:24:56,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:24:56,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:24:56,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:24:56,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:24:56,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:24:56,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:24:56,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:24:56,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:24:56,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:24:56,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:24:56,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:24:57,108 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:24:57,119 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:24:57,689 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:24:57,756 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:24:57,756 INFO L300 CfgBuilder]: Removed 31 assume(true) statements. [2022-11-23 15:24:57,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:24:57 BoogieIcfgContainer [2022-11-23 15:24:57,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:24:57,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:24:57,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:24:57,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:24:57,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:24:56" (1/3) ... [2022-11-23 15:24:57,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aafea56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:24:57, skipping insertion in model container [2022-11-23 15:24:57,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:24:56" (2/3) ... [2022-11-23 15:24:57,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aafea56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:24:57, skipping insertion in model container [2022-11-23 15:24:57,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:24:57" (3/3) ... [2022-11-23 15:24:57,784 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-queue-2.i [2022-11-23 15:24:57,806 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:24:57,807 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2022-11-23 15:24:57,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:24:57,886 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;@3018f3fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:24:57,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2022-11-23 15:24:57,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 86 states have (on average 2.441860465116279) internal successors, (210), 156 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:24:57,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:24:57,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:57,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:24:57,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:24:57,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:57,907 INFO L85 PathProgramCache]: Analyzing trace with hash 14481, now seen corresponding path program 1 times [2022-11-23 15:24:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:57,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434448162] [2022-11-23 15:24:57,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:57,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:24:58,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:58,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434448162] [2022-11-23 15:24:58,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434448162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:58,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:24:58,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:24:58,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720846933] [2022-11-23 15:24:58,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:58,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:24:58,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:58,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:24:58,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:24:58,257 INFO L87 Difference]: Start difference. First operand has 157 states, 86 states have (on average 2.441860465116279) internal successors, (210), 156 states have internal predecessors, (210), 0 states have call successors, (0), 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) [2022-11-23 15:24:58,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:58,498 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2022-11-23 15:24:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:24:58,502 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 [2022-11-23 15:24:58,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:58,523 INFO L225 Difference]: With dead ends: 153 [2022-11-23 15:24:58,534 INFO L226 Difference]: Without dead ends: 151 [2022-11-23 15:24:58,536 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 [2022-11-23 15:24:58,540 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 146 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:58,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 91 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:24:58,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-23 15:24:58,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2022-11-23 15:24:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 88 states have (on average 1.8068181818181819) internal successors, (159), 147 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:24:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 159 transitions. [2022-11-23 15:24:58,613 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 159 transitions. Word has length 2 [2022-11-23 15:24:58,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:58,614 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 159 transitions. [2022-11-23 15:24:58,615 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) [2022-11-23 15:24:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 159 transitions. [2022-11-23 15:24:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:24:58,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:58,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:24:58,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:24:58,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:24:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:58,620 INFO L85 PathProgramCache]: Analyzing trace with hash 14482, now seen corresponding path program 1 times [2022-11-23 15:24:58,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:58,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214482299] [2022-11-23 15:24:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:58,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:24:58,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:58,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214482299] [2022-11-23 15:24:58,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214482299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:58,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:24:58,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:24:58,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864437517] [2022-11-23 15:24:58,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:58,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:24:58,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:58,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:24:58,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:24:58,736 INFO L87 Difference]: Start difference. First operand 148 states and 159 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) [2022-11-23 15:24:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:58,892 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2022-11-23 15:24:58,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:24:58,892 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 [2022-11-23 15:24:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:58,893 INFO L225 Difference]: With dead ends: 140 [2022-11-23 15:24:58,894 INFO L226 Difference]: Without dead ends: 140 [2022-11-23 15:24:58,894 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 [2022-11-23 15:24:58,895 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 134 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:58,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 96 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:24:58,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-23 15:24:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-11-23 15:24:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.6818181818181819) internal successors, (148), 137 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) [2022-11-23 15:24:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2022-11-23 15:24:58,904 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 2 [2022-11-23 15:24:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:58,904 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2022-11-23 15:24:58,904 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) [2022-11-23 15:24:58,905 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2022-11-23 15:24:58,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:24:58,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:58,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:24:58,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:24:58,906 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:24:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:58,907 INFO L85 PathProgramCache]: Analyzing trace with hash 500446804, now seen corresponding path program 1 times [2022-11-23 15:24:58,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:58,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84679867] [2022-11-23 15:24:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:58,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:24:59,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:59,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84679867] [2022-11-23 15:24:59,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84679867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:59,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:24:59,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:24:59,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298044383] [2022-11-23 15:24:59,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:59,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:24:59,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:59,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:24:59,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:24:59,138 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-23 15:24:59,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:59,310 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2022-11-23 15:24:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:24:59,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2022-11-23 15:24:59,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:59,314 INFO L225 Difference]: With dead ends: 146 [2022-11-23 15:24:59,314 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 15:24:59,314 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 [2022-11-23 15:24:59,318 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 240 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:59,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 96 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:24:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 15:24:59,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2022-11-23 15:24:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 94 states have (on average 1.627659574468085) internal successors, (153), 138 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:24:59,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2022-11-23 15:24:59,338 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 6 [2022-11-23 15:24:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:59,338 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2022-11-23 15:24:59,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-23 15:24:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2022-11-23 15:24:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:24:59,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:59,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:24:59,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:24:59,340 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:24:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:59,340 INFO L85 PathProgramCache]: Analyzing trace with hash 500446805, now seen corresponding path program 1 times [2022-11-23 15:24:59,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:59,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404054140] [2022-11-23 15:24:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:59,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:24:59,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:59,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404054140] [2022-11-23 15:24:59,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404054140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:59,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:24:59,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:24:59,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370386298] [2022-11-23 15:24:59,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:59,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:24:59,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:59,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:24:59,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:24:59,562 INFO L87 Difference]: Start difference. First operand 139 states and 153 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) [2022-11-23 15:24:59,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:24:59,863 INFO L93 Difference]: Finished difference Result 221 states and 238 transitions. [2022-11-23 15:24:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:24:59,863 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 [2022-11-23 15:24:59,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:24:59,864 INFO L225 Difference]: With dead ends: 221 [2022-11-23 15:24:59,865 INFO L226 Difference]: Without dead ends: 221 [2022-11-23 15:24:59,865 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 [2022-11-23 15:24:59,866 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 294 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:24:59,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 219 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:24:59,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-23 15:24:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 143. [2022-11-23 15:24:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 98 states have (on average 1.6122448979591837) internal successors, (158), 142 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:24:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2022-11-23 15:24:59,877 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 6 [2022-11-23 15:24:59,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:24:59,877 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2022-11-23 15:24:59,877 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) [2022-11-23 15:24:59,878 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2022-11-23 15:24:59,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:24:59,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:24:59,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:24:59,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:24:59,881 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:24:59,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:24:59,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1666017632, now seen corresponding path program 1 times [2022-11-23 15:24:59,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:24:59,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436946750] [2022-11-23 15:24:59,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:24:59,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:24:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:24:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:24:59,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:24:59,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436946750] [2022-11-23 15:24:59,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436946750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:24:59,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:24:59,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:24:59,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613335829] [2022-11-23 15:24:59,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:24:59,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:24:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:24:59,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:24:59,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:24:59,953 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:00,014 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2022-11-23 15:25:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:25:00,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 15:25:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:00,016 INFO L225 Difference]: With dead ends: 133 [2022-11-23 15:25:00,016 INFO L226 Difference]: Without dead ends: 133 [2022-11-23 15:25:00,017 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 [2022-11-23 15:25:00,018 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 114 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:00,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 110 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:25:00,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-23 15:25:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-11-23 15:25:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 93 states have (on average 1.5806451612903225) internal successors, (147), 132 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2022-11-23 15:25:00,033 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 7 [2022-11-23 15:25:00,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:00,033 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2022-11-23 15:25:00,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2022-11-23 15:25:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:25:00,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:00,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:00,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:25:00,035 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:00,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:00,036 INFO L85 PathProgramCache]: Analyzing trace with hash -106550054, now seen corresponding path program 1 times [2022-11-23 15:25:00,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:00,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345342694] [2022-11-23 15:25:00,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:00,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:00,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:00,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345342694] [2022-11-23 15:25:00,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345342694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:00,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:00,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:25:00,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653148539] [2022-11-23 15:25:00,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:00,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:25:00,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:00,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:25:00,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:25:00,210 INFO L87 Difference]: Start difference. First operand 133 states and 147 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) [2022-11-23 15:25:00,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:00,375 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2022-11-23 15:25:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:25:00,376 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 [2022-11-23 15:25:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:00,378 INFO L225 Difference]: With dead ends: 135 [2022-11-23 15:25:00,378 INFO L226 Difference]: Without dead ends: 135 [2022-11-23 15:25:00,378 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 [2022-11-23 15:25:00,382 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 102 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:00,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 258 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:25:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-23 15:25:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2022-11-23 15:25:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 93 states have (on average 1.5698924731182795) internal successors, (146), 131 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:00,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2022-11-23 15:25:00,385 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 8 [2022-11-23 15:25:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:00,386 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2022-11-23 15:25:00,386 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) [2022-11-23 15:25:00,386 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2022-11-23 15:25:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:25:00,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:00,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:00,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:25:00,393 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:00,393 INFO L85 PathProgramCache]: Analyzing trace with hash -106550053, now seen corresponding path program 1 times [2022-11-23 15:25:00,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:00,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728622905] [2022-11-23 15:25:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:00,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:00,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:00,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728622905] [2022-11-23 15:25:00,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728622905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:00,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:00,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:25:00,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953299721] [2022-11-23 15:25:00,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:00,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:25:00,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:00,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:25:00,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:25:00,625 INFO L87 Difference]: Start difference. First operand 132 states and 146 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) [2022-11-23 15:25:00,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:00,869 INFO L93 Difference]: Finished difference Result 194 states and 211 transitions. [2022-11-23 15:25:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:25:00,870 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 [2022-11-23 15:25:00,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:00,871 INFO L225 Difference]: With dead ends: 194 [2022-11-23 15:25:00,871 INFO L226 Difference]: Without dead ends: 194 [2022-11-23 15:25:00,871 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 [2022-11-23 15:25:00,872 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 89 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:00,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 475 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:25:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-23 15:25:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 122. [2022-11-23 15:25:00,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 121 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2022-11-23 15:25:00,877 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 8 [2022-11-23 15:25:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:00,877 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2022-11-23 15:25:00,878 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) [2022-11-23 15:25:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2022-11-23 15:25:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 15:25:00,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:00,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:00,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:25:00,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:00,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1560613291, now seen corresponding path program 1 times [2022-11-23 15:25:00,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:00,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77231806] [2022-11-23 15:25:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:00,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:00,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:00,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77231806] [2022-11-23 15:25:00,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77231806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:00,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:00,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:25:00,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271518547] [2022-11-23 15:25:00,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:00,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:25:00,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:00,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:25:00,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:25:00,920 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:00,980 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2022-11-23 15:25:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:25:00,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 15:25:00,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:00,982 INFO L225 Difference]: With dead ends: 168 [2022-11-23 15:25:00,982 INFO L226 Difference]: Without dead ends: 168 [2022-11-23 15:25:00,983 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 [2022-11-23 15:25:00,984 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 37 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:00,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 202 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:25:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-23 15:25:00,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 133. [2022-11-23 15:25:00,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 100 states have (on average 1.47) internal successors, (147), 132 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:00,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2022-11-23 15:25:00,990 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 13 [2022-11-23 15:25:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:00,990 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2022-11-23 15:25:00,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:00,991 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2022-11-23 15:25:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 15:25:00,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:00,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:00,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:25:00,993 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:00,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:00,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1586118442, now seen corresponding path program 1 times [2022-11-23 15:25:00,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:00,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229240821] [2022-11-23 15:25:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:00,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:01,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:01,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229240821] [2022-11-23 15:25:01,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229240821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:01,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:01,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:25:01,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923144088] [2022-11-23 15:25:01,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:01,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:25:01,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:01,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:25:01,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:25:01,113 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2022-11-23 15:25:01,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:01,224 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2022-11-23 15:25:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:25:01,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 15:25:01,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:01,225 INFO L225 Difference]: With dead ends: 132 [2022-11-23 15:25:01,225 INFO L226 Difference]: Without dead ends: 132 [2022-11-23 15:25:01,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:25:01,226 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 83 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:01,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 338 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:25:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-23 15:25:01,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-11-23 15:25:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 99 states have (on average 1.4646464646464648) internal successors, (145), 130 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:01,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-11-23 15:25:01,231 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 14 [2022-11-23 15:25:01,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:01,231 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-11-23 15:25:01,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2022-11-23 15:25:01,231 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-11-23 15:25:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 15:25:01,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:01,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:01,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:25:01,233 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:01,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:01,233 INFO L85 PathProgramCache]: Analyzing trace with hash 906820433, now seen corresponding path program 1 times [2022-11-23 15:25:01,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:01,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021761947] [2022-11-23 15:25:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:01,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:01,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:01,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021761947] [2022-11-23 15:25:01,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021761947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:01,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:01,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:25:01,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515113978] [2022-11-23 15:25:01,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:01,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:25:01,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:25:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:25:01,277 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:01,352 INFO L93 Difference]: Finished difference Result 132 states and 145 transitions. [2022-11-23 15:25:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:25:01,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 15:25:01,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:01,354 INFO L225 Difference]: With dead ends: 132 [2022-11-23 15:25:01,354 INFO L226 Difference]: Without dead ends: 132 [2022-11-23 15:25:01,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:25:01,355 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 117 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:01,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 183 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:25:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-23 15:25:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-11-23 15:25:01,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 99 states have (on average 1.4545454545454546) internal successors, (144), 130 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-11-23 15:25:01,359 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 16 [2022-11-23 15:25:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:01,359 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-11-23 15:25:01,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:01,359 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-11-23 15:25:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 15:25:01,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:01,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:01,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:25:01,361 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:01,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:01,361 INFO L85 PathProgramCache]: Analyzing trace with hash 906839708, now seen corresponding path program 1 times [2022-11-23 15:25:01,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:01,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114794955] [2022-11-23 15:25:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:01,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:01,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:01,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114794955] [2022-11-23 15:25:01,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114794955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:01,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:01,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:25:01,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830822526] [2022-11-23 15:25:01,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:01,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:25:01,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:01,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:25:01,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:25:01,506 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:01,618 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2022-11-23 15:25:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:25:01,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 15:25:01,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:01,619 INFO L225 Difference]: With dead ends: 136 [2022-11-23 15:25:01,620 INFO L226 Difference]: Without dead ends: 136 [2022-11-23 15:25:01,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:25:01,621 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 7 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:01,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 388 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:25:01,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-23 15:25:01,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2022-11-23 15:25:01,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 102 states have (on average 1.4411764705882353) internal successors, (147), 133 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 147 transitions. [2022-11-23 15:25:01,624 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 147 transitions. Word has length 16 [2022-11-23 15:25:01,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:01,624 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 147 transitions. [2022-11-23 15:25:01,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:01,625 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 147 transitions. [2022-11-23 15:25:01,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 15:25:01,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:01,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:01,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:25:01,628 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:01,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:01,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1953337202, now seen corresponding path program 1 times [2022-11-23 15:25:01,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:01,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23800433] [2022-11-23 15:25:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:01,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:01,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:01,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:01,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23800433] [2022-11-23 15:25:01,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23800433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:01,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:01,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:25:01,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617811288] [2022-11-23 15:25:01,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:01,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:25:01,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:25:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:25:01,740 INFO L87 Difference]: Start difference. First operand 134 states and 147 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:01,822 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2022-11-23 15:25:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:25:01,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 15:25:01,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:01,824 INFO L225 Difference]: With dead ends: 134 [2022-11-23 15:25:01,824 INFO L226 Difference]: Without dead ends: 134 [2022-11-23 15:25:01,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:25:01,825 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 121 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:01,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 178 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:25:01,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-23 15:25:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-23 15:25:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 102 states have (on average 1.4313725490196079) internal successors, (146), 133 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2022-11-23 15:25:01,832 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 17 [2022-11-23 15:25:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:01,832 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2022-11-23 15:25:01,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2022-11-23 15:25:01,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 15:25:01,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:01,840 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:01,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:25:01,840 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:01,841 INFO L85 PathProgramCache]: Analyzing trace with hash 643754262, now seen corresponding path program 1 times [2022-11-23 15:25:01,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:01,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120749579] [2022-11-23 15:25:01,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:01,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:02,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:02,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120749579] [2022-11-23 15:25:02,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120749579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:02,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730909296] [2022-11-23 15:25:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:02,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:02,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:02,019 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:02,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:25:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:02,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 15:25:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:02,194 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 [2022-11-23 15:25:02,219 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 [2022-11-23 15:25:02,253 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 15:25:02,260 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 21 treesize of output 20 [2022-11-23 15:25:02,375 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 15 treesize of output 7 [2022-11-23 15:25:02,385 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 15 treesize of output 7 [2022-11-23 15:25:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:02,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:25:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:02,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730909296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:25:02,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419293145] [2022-11-23 15:25:02,545 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-23 15:25:02,545 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:25:02,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:25:02,556 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:25:02,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:25:02,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:02,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:02,608 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 [2022-11-23 15:25:02,639 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 [2022-11-23 15:25:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:02,655 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 [2022-11-23 15:25:02,667 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 [2022-11-23 15:25:02,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:02,697 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 [2022-11-23 15:25:02,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:02,713 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 [2022-11-23 15:25:02,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:02,726 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 [2022-11-23 15:25:03,138 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:25:04,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [419293145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:04,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:25:04,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4, 4] total 12 [2022-11-23 15:25:04,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082004960] [2022-11-23 15:25:04,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:04,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:25:04,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:04,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:25:04,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:25:04,468 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-11-23 15:25:04,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:04,982 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2022-11-23 15:25:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 15:25:04,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 [2022-11-23 15:25:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:04,984 INFO L225 Difference]: With dead ends: 146 [2022-11-23 15:25:04,984 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 15:25:04,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:25:04,985 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 17 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:04,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 299 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:25:04,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 15:25:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2022-11-23 15:25:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 108 states have (on average 1.4166666666666667) internal successors, (153), 139 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2022-11-23 15:25:04,988 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 20 [2022-11-23 15:25:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:04,988 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2022-11-23 15:25:04,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-11-23 15:25:04,989 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2022-11-23 15:25:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 15:25:04,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:04,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:05,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:05,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:05,190 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:05,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:05,191 INFO L85 PathProgramCache]: Analyzing trace with hash 643755330, now seen corresponding path program 1 times [2022-11-23 15:25:05,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:05,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234538143] [2022-11-23 15:25:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:05,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:05,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:05,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234538143] [2022-11-23 15:25:05,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234538143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:05,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191211919] [2022-11-23 15:25:05,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:05,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:05,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:05,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:05,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:25:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:05,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 15:25:05,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:05,472 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 13 treesize of output 9 [2022-11-23 15:25:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:05,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:25:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:05,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191211919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:25:05,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1934820002] [2022-11-23 15:25:05,545 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-23 15:25:05,545 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:25:05,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:25:05,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:25:05,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:25:05,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:05,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:05,566 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 [2022-11-23 15:25:05,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:05,586 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 [2022-11-23 15:25:05,596 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 [2022-11-23 15:25:05,604 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 [2022-11-23 15:25:05,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:05,626 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 [2022-11-23 15:25:05,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:05,638 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 [2022-11-23 15:25:05,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:05,655 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 [2022-11-23 15:25:05,922 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:25:07,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1934820002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:07,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:25:07,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [3, 3, 3] total 13 [2022-11-23 15:25:07,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104534173] [2022-11-23 15:25:07,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:07,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 15:25:07,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:07,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 15:25:07,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:25:07,353 INFO L87 Difference]: Start difference. First operand 140 states and 153 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:07,990 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2022-11-23 15:25:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:25:07,990 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-23 15:25:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:07,991 INFO L225 Difference]: With dead ends: 141 [2022-11-23 15:25:07,991 INFO L226 Difference]: Without dead ends: 126 [2022-11-23 15:25:07,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:25:07,992 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 15 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:07,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 343 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:25:07,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-23 15:25:07,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-23 15:25:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 94 states have (on average 1.4574468085106382) internal successors, (137), 125 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:07,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2022-11-23 15:25:07,995 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 20 [2022-11-23 15:25:07,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:07,996 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2022-11-23 15:25:07,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:07,996 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2022-11-23 15:25:07,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 15:25:07,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:07,997 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] [2022-11-23 15:25:08,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:08,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 15:25:08,203 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1524985434, now seen corresponding path program 1 times [2022-11-23 15:25:08,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:08,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529515337] [2022-11-23 15:25:08,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:08,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:08,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529515337] [2022-11-23 15:25:08,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529515337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:08,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497906988] [2022-11-23 15:25:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:08,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:08,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:08,589 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:08,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:25:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:08,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 15:25:08,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:08,709 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 [2022-11-23 15:25:08,772 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:25:08,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-23 15:25:08,817 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 [2022-11-23 15:25:08,884 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:25:08,885 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 30 treesize of output 28 [2022-11-23 15:25:08,917 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:25:08,917 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 27 treesize of output 28 [2022-11-23 15:25:09,009 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 24 treesize of output 12 [2022-11-23 15:25:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:09,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:25:09,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:09,127 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 19 treesize of output 20 [2022-11-23 15:25:09,138 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:09,138 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 33 treesize of output 36 [2022-11-23 15:25:09,150 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 20 treesize of output 18 [2022-11-23 15:25:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:09,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497906988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:25:09,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [801284168] [2022-11-23 15:25:09,316 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-23 15:25:09,316 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:25:09,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:25:09,317 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:25:09,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:25:09,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,339 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 [2022-11-23 15:25:09,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,359 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 [2022-11-23 15:25:09,369 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 [2022-11-23 15:25:09,377 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 [2022-11-23 15:25:09,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,395 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 [2022-11-23 15:25:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,408 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 [2022-11-23 15:25:09,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,420 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 [2022-11-23 15:25:09,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,456 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 [2022-11-23 15:25:09,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,486 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 [2022-11-23 15:25:09,496 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 [2022-11-23 15:25:09,510 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 [2022-11-23 15:25:09,550 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:25:09,551 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 [2022-11-23 15:25:09,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,566 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 [2022-11-23 15:25:09,592 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:25:09,592 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 [2022-11-23 15:25:09,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,627 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:25:09,628 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 [2022-11-23 15:25:09,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,646 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 [2022-11-23 15:25:09,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,664 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 [2022-11-23 15:25:09,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,757 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 [2022-11-23 15:25:09,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:09,799 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:25:09,800 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 1 case distinctions, treesize of input 48 treesize of output 45 [2022-11-23 15:25:09,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,814 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 123 treesize of output 86 [2022-11-23 15:25:09,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,832 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 [2022-11-23 15:25:09,922 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-23 15:25:09,922 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 [2022-11-23 15:25:09,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,948 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 [2022-11-23 15:25:09,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:09,971 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 [2022-11-23 15:25:10,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:10,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:10,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:10,028 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 15:25:10,028 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 37 treesize of output 46 [2022-11-23 15:25:10,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:10,049 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:25:10,050 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 34 treesize of output 21 [2022-11-23 15:25:10,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:10,066 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:25:10,067 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 [2022-11-23 15:25:10,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:25:10,241 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 9 [2022-11-23 15:25:10,265 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 [2022-11-23 15:25:10,278 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 15 treesize of output 1 [2022-11-23 15:25:10,286 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 [2022-11-23 15:25:10,426 INFO L321 Elim1Store]: treesize reduction 32, result has 57.3 percent of original size [2022-11-23 15:25:10,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 122 [2022-11-23 15:25:10,495 INFO L321 Elim1Store]: treesize reduction 32, result has 57.3 percent of original size [2022-11-23 15:25:10,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 114 [2022-11-23 15:25:11,081 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 15 treesize of output 1 [2022-11-23 15:25:11,122 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:25:12,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4642#(and (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (<= 0 |ULTIMATE.start_main_~item~0#1.offset|) (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (= |ULTIMATE.start_main_~status~0#1| 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0) (<= |ULTIMATE.start_main_~item~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:25:12,694 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:25:12,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:25:12,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-11-23 15:25:12,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618494434] [2022-11-23 15:25:12,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:25:12,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 15:25:12,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:12,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 15:25:12,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=968, Unknown=8, NotChecked=0, Total=1122 [2022-11-23 15:25:12,697 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:13,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:13,616 INFO L93 Difference]: Finished difference Result 239 states and 262 transitions. [2022-11-23 15:25:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:25:13,617 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-23 15:25:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:13,618 INFO L225 Difference]: With dead ends: 239 [2022-11-23 15:25:13,618 INFO L226 Difference]: Without dead ends: 239 [2022-11-23 15:25:13,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=250, Invalid=1464, Unknown=8, NotChecked=0, Total=1722 [2022-11-23 15:25:13,620 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 811 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:13,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 937 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:25:13,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-23 15:25:13,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 140. [2022-11-23 15:25:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 108 states have (on average 1.4166666666666667) internal successors, (153), 139 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2022-11-23 15:25:13,624 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 24 [2022-11-23 15:25:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:13,624 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2022-11-23 15:25:13,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2022-11-23 15:25:13,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 15:25:13,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:13,625 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, 1] [2022-11-23 15:25:13,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:13,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 15:25:13,826 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:13,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2121973913, now seen corresponding path program 1 times [2022-11-23 15:25:13,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:13,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208971305] [2022-11-23 15:25:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:13,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:13,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:13,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208971305] [2022-11-23 15:25:13,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208971305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:13,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:25:13,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:25:13,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294238670] [2022-11-23 15:25:13,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:13,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:25:13,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:25:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:25:13,871 INFO L87 Difference]: Start difference. First operand 140 states and 153 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:13,928 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2022-11-23 15:25:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:25:13,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-23 15:25:13,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:13,930 INFO L225 Difference]: With dead ends: 191 [2022-11-23 15:25:13,930 INFO L226 Difference]: Without dead ends: 191 [2022-11-23 15:25:13,931 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 [2022-11-23 15:25:13,931 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 45 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:13,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 193 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:25:13,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-23 15:25:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 156. [2022-11-23 15:25:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 124 states have (on average 1.3629032258064515) internal successors, (169), 155 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 169 transitions. [2022-11-23 15:25:13,939 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 169 transitions. Word has length 25 [2022-11-23 15:25:13,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:13,941 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 169 transitions. [2022-11-23 15:25:13,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:13,942 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 169 transitions. [2022-11-23 15:25:13,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 15:25:13,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:13,945 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:13,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 15:25:13,945 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:13,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:13,948 INFO L85 PathProgramCache]: Analyzing trace with hash -559240723, now seen corresponding path program 1 times [2022-11-23 15:25:13,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:13,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378094974] [2022-11-23 15:25:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:13,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:14,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:14,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378094974] [2022-11-23 15:25:14,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378094974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:14,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004792850] [2022-11-23 15:25:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:14,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:14,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:14,347 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:14,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:25:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:14,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 15:25:14,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:14,461 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 [2022-11-23 15:25:14,535 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:25:14,535 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 [2022-11-23 15:25:14,578 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 [2022-11-23 15:25:14,657 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:25:14,658 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 [2022-11-23 15:25:14,702 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:25:14,702 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 [2022-11-23 15:25:14,899 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 25 treesize of output 13 [2022-11-23 15:25:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:14,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:25:15,077 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_435 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_435) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2022-11-23 15:25:15,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:15,085 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-23 15:25:15,093 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:15,094 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 [2022-11-23 15:25:15,123 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 7 treesize of output 5 [2022-11-23 15:25:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:19,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004792850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:25:19,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837272063] [2022-11-23 15:25:19,322 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-23 15:25:19,323 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:25:19,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:25:19,323 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:25:19,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:25:19,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,344 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 [2022-11-23 15:25:19,357 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 [2022-11-23 15:25:19,365 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 [2022-11-23 15:25:19,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,377 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 30 treesize of output 21 [2022-11-23 15:25:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,398 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 [2022-11-23 15:25:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,408 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 [2022-11-23 15:25:19,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,420 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 [2022-11-23 15:25:19,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,458 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 [2022-11-23 15:25:19,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,480 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 [2022-11-23 15:25:19,489 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 [2022-11-23 15:25:19,501 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 [2022-11-23 15:25:19,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,551 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-23 15:25:19,551 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 [2022-11-23 15:25:19,578 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:25:19,579 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 [2022-11-23 15:25:19,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,596 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 [2022-11-23 15:25:19,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:19,669 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 15:25:19,669 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 47 treesize of output 56 [2022-11-23 15:25:19,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,687 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:25:19,688 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 [2022-11-23 15:25:19,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:19,704 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 [2022-11-23 15:25:19,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:25:19,787 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 9 [2022-11-23 15:25:19,807 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 15 treesize of output 1 [2022-11-23 15:25:19,839 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 [2022-11-23 15:25:19,852 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 [2022-11-23 15:25:20,054 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:25:20,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 172 treesize of output 190 [2022-11-23 15:25:20,129 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:25:20,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 150 [2022-11-23 15:25:21,746 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 15 treesize of output 1 [2022-11-23 15:25:21,846 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 [2022-11-23 15:25:21,850 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 [2022-11-23 15:25:21,855 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 [2022-11-23 15:25:21,880 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 9 [2022-11-23 15:25:21,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:25:21,902 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 [2022-11-23 15:25:21,909 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 [2022-11-23 15:25:21,919 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 15 treesize of output 1 [2022-11-23 15:25:22,030 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:25:22,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 172 treesize of output 190 [2022-11-23 15:25:22,100 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:25:22,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 150 [2022-11-23 15:25:25,020 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 15 treesize of output 1 [2022-11-23 15:25:25,197 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 [2022-11-23 15:25:25,205 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 [2022-11-23 15:25:25,214 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 [2022-11-23 15:25:25,357 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:25:27,466 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5610#(and (= |ULTIMATE.start_main_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (not |ULTIMATE.start_main_#t~short23#1|) (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (not (= (select |#valid| |ULTIMATE.start_main_~item~0#1.base|) 1)) (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (= |ULTIMATE.start_main_~status~0#1| 1) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) |ULTIMATE.start_main_~item~0#1.offset|) (or (not (= |ULTIMATE.start_main_~item~0#1.offset| 0)) (not (= |ULTIMATE.start_main_~item~0#1.base| 0))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:25:27,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:25:27,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:25:27,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2022-11-23 15:25:27,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293816603] [2022-11-23 15:25:27,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:25:27,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 15:25:27,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 15:25:27,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1649, Unknown=2, NotChecked=84, Total=1980 [2022-11-23 15:25:27,469 INFO L87 Difference]: Start difference. First operand 156 states and 169 transitions. Second operand has 24 states, 23 states have (on average 4.130434782608695) internal successors, (95), 24 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:28,291 INFO L93 Difference]: Finished difference Result 282 states and 305 transitions. [2022-11-23 15:25:28,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 15:25:28,291 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.130434782608695) internal successors, (95), 24 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-23 15:25:28,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:28,293 INFO L225 Difference]: With dead ends: 282 [2022-11-23 15:25:28,293 INFO L226 Difference]: Without dead ends: 282 [2022-11-23 15:25:28,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=388, Invalid=2476, Unknown=2, NotChecked=104, Total=2970 [2022-11-23 15:25:28,294 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 978 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:28,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [978 Valid, 523 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 479 Invalid, 0 Unknown, 184 Unchecked, 0.5s Time] [2022-11-23 15:25:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-23 15:25:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 165. [2022-11-23 15:25:28,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 133 states have (on average 1.3609022556390977) internal successors, (181), 164 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 181 transitions. [2022-11-23 15:25:28,311 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 181 transitions. Word has length 32 [2022-11-23 15:25:28,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:28,312 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 181 transitions. [2022-11-23 15:25:28,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.130434782608695) internal successors, (95), 24 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 181 transitions. [2022-11-23 15:25:28,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 15:25:28,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:28,314 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:28,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:28,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 15:25:28,520 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:28,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:28,521 INFO L85 PathProgramCache]: Analyzing trace with hash -559240722, now seen corresponding path program 1 times [2022-11-23 15:25:28,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:28,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817834601] [2022-11-23 15:25:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:28,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:29,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:29,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817834601] [2022-11-23 15:25:29,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817834601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:29,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715788483] [2022-11-23 15:25:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:29,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:29,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:29,049 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:29,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:25:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:29,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 15:25:29,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:29,181 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 [2022-11-23 15:25:29,251 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:25:29,252 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 [2022-11-23 15:25:29,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:25:29,315 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 [2022-11-23 15:25:29,327 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 [2022-11-23 15:25:29,410 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:25:29,411 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 [2022-11-23 15:25:29,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:29,427 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 14 treesize of output 16 [2022-11-23 15:25:29,465 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:25:29,465 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 [2022-11-23 15:25:29,473 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 [2022-11-23 15:25:29,677 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 25 treesize of output 13 [2022-11-23 15:25:29,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-23 15:25:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:29,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:25:30,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:30,076 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 [2022-11-23 15:25:30,083 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:30,083 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 [2022-11-23 15:25:30,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:30,094 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 52 treesize of output 55 [2022-11-23 15:25:30,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:30,110 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 82 treesize of output 81 [2022-11-23 15:25:30,117 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 34 treesize of output 30 [2022-11-23 15:25:30,123 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 62 treesize of output 58 [2022-11-23 15:25:30,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:30,177 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 [2022-11-23 15:25:30,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:30,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-23 15:25:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:30,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715788483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:25:30,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [431517551] [2022-11-23 15:25:30,321 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-23 15:25:30,321 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:25:30,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:25:30,321 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:25:30,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:25:30,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,339 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 [2022-11-23 15:25:30,354 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 [2022-11-23 15:25:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,364 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 [2022-11-23 15:25:30,372 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 [2022-11-23 15:25:30,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,390 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 [2022-11-23 15:25:30,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,400 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 [2022-11-23 15:25:30,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,412 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 [2022-11-23 15:25:30,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,444 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 [2022-11-23 15:25:30,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,470 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 [2022-11-23 15:25:30,483 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 [2022-11-23 15:25:30,493 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 19 treesize of output 11 [2022-11-23 15:25:30,529 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:25:30,530 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 [2022-11-23 15:25:30,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,543 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 [2022-11-23 15:25:30,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,558 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 39 treesize of output 33 [2022-11-23 15:25:30,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,586 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 [2022-11-23 15:25:30,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,599 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 [2022-11-23 15:25:30,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,616 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 [2022-11-23 15:25:30,752 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-23 15:25:30,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 300 [2022-11-23 15:25:30,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:30,866 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-23 15:25:30,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 321 [2022-11-23 15:25:30,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:30,915 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-23 15:25:30,915 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 320 treesize of output 323 [2022-11-23 15:25:30,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:30,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:30,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:30,956 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 15:25:30,956 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 328 treesize of output 311 [2022-11-23 15:25:31,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:31,359 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-23 15:25:31,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 466 treesize of output 363 [2022-11-23 15:25:31,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:31,428 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-23 15:25:31,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 412 [2022-11-23 15:25:31,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:31,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:31,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:31,530 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-23 15:25:31,531 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 9 case distinctions, treesize of input 406 treesize of output 389 [2022-11-23 15:25:31,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:31,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:31,844 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-23 15:25:31,844 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 37 treesize of output 46 [2022-11-23 15:25:31,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:31,871 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:25:31,871 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 41 treesize of output 24 [2022-11-23 15:25:31,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:31,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:31,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:31,891 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:25:31,891 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 [2022-11-23 15:25:32,018 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-23 15:25:32,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 300 [2022-11-23 15:25:32,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:32,122 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-23 15:25:32,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 321 [2022-11-23 15:25:32,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:32,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:32,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:32,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:32,160 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 15:25:32,161 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 324 treesize of output 307 [2022-11-23 15:25:32,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:32,205 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-23 15:25:32,205 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 320 treesize of output 323 [2022-11-23 15:25:32,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:32,492 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-23 15:25:32,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 466 treesize of output 363 [2022-11-23 15:25:32,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:32,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:32,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:32,571 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-23 15:25:32,572 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 9 case distinctions, treesize of input 422 treesize of output 405 [2022-11-23 15:25:32,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:32,629 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-23 15:25:32,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 412 [2022-11-23 15:25:32,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:32,906 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:25:32,906 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 [2022-11-23 15:25:32,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:32,919 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 [2022-11-23 15:25:32,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:32,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:32,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:32,949 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 [2022-11-23 15:25:33,168 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:25:39,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [431517551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:25:39,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:25:39,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10, 7, 7] total 37 [2022-11-23 15:25:39,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638897987] [2022-11-23 15:25:39,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:25:39,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 15:25:39,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:39,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 15:25:39,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1129, Unknown=13, NotChecked=0, Total=1406 [2022-11-23 15:25:39,742 INFO L87 Difference]: Start difference. First operand 165 states and 181 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:42,333 INFO L93 Difference]: Finished difference Result 177 states and 191 transitions. [2022-11-23 15:25:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 15:25:42,334 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-23 15:25:42,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:42,335 INFO L225 Difference]: With dead ends: 177 [2022-11-23 15:25:42,335 INFO L226 Difference]: Without dead ends: 177 [2022-11-23 15:25:42,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 14 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=320, Invalid=1307, Unknown=13, NotChecked=0, Total=1640 [2022-11-23 15:25:42,336 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 31 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:42,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 536 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 15:25:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-23 15:25:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 168. [2022-11-23 15:25:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 167 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 183 transitions. [2022-11-23 15:25:42,340 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 183 transitions. Word has length 32 [2022-11-23 15:25:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:42,341 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 183 transitions. [2022-11-23 15:25:42,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 183 transitions. [2022-11-23 15:25:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 15:25:42,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:42,341 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:42,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:42,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 15:25:42,542 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:42,543 INFO L85 PathProgramCache]: Analyzing trace with hash -559358684, now seen corresponding path program 1 times [2022-11-23 15:25:42,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:42,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270690060] [2022-11-23 15:25:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:42,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:43,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:43,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:43,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270690060] [2022-11-23 15:25:43,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270690060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:43,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090286581] [2022-11-23 15:25:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:43,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:43,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:43,279 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:43,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:25:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:43,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-23 15:25:43,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:43,416 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 [2022-11-23 15:25:43,450 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:25:43,450 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 [2022-11-23 15:25:43,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:25:43,500 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 [2022-11-23 15:25:43,513 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 [2022-11-23 15:25:43,604 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:25:43,604 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 [2022-11-23 15:25:43,608 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 [2022-11-23 15:25:43,628 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:25:43,629 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 [2022-11-23 15:25:43,723 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:25:43,724 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 70 treesize of output 63 [2022-11-23 15:25:43,730 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 21 treesize of output 13 [2022-11-23 15:25:43,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 21 treesize of output 9 [2022-11-23 15:25:43,744 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 [2022-11-23 15:25:44,065 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 29 treesize of output 17 [2022-11-23 15:25:44,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-23 15:25:44,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:44,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:44,168 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 [2022-11-23 15:25:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:44,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:25:44,273 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 72 treesize of output 52 [2022-11-23 15:25:44,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:44,544 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 18 treesize of output 19 [2022-11-23 15:25:44,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:44,552 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 30 treesize of output 33 [2022-11-23 15:25:44,568 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 [2022-11-23 15:25:44,579 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:25:44,580 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 18 treesize of output 1 [2022-11-23 15:25:44,589 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:44,589 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 22 treesize of output 23 [2022-11-23 15:25:44,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:44,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,597 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 [2022-11-23 15:25:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:44,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090286581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:25:44,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2117325909] [2022-11-23 15:25:44,756 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-23 15:25:44,756 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:25:44,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:25:44,757 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:25:44,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:25:44,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,783 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 [2022-11-23 15:25:44,796 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 [2022-11-23 15:25:44,802 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 [2022-11-23 15:25:44,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,815 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 [2022-11-23 15:25:44,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,835 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 [2022-11-23 15:25:44,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,844 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 28 treesize of output 30 [2022-11-23 15:25:44,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,857 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 [2022-11-23 15:25:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,884 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 [2022-11-23 15:25:44,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,909 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 [2022-11-23 15:25:44,919 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 [2022-11-23 15:25:44,928 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 [2022-11-23 15:25:44,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:44,981 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-23 15:25:44,982 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 [2022-11-23 15:25:45,011 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:25:45,012 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 [2022-11-23 15:25:45,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:45,030 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 [2022-11-23 15:25:45,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:45,054 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:25:45,054 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 [2022-11-23 15:25:45,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:45,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:45,068 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 [2022-11-23 15:25:45,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:45,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:45,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:45,083 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 47 treesize of output 52 [2022-11-23 15:25:45,148 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 9 [2022-11-23 15:25:45,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:25:45,172 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 [2022-11-23 15:25:45,177 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 15 treesize of output 1 [2022-11-23 15:25:45,186 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 [2022-11-23 15:25:45,244 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 15 treesize of output 1 [2022-11-23 15:25:45,310 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:25:45,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 172 treesize of output 166 [2022-11-23 15:25:45,378 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:25:45,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 150 [2022-11-23 15:25:45,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:45,621 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 [2022-11-23 15:25:45,626 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 13 treesize of output 9 [2022-11-23 15:25:45,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:45,633 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 [2022-11-23 15:25:45,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:25:45,661 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 9 [2022-11-23 15:25:45,683 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 [2022-11-23 15:25:45,689 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 [2022-11-23 15:25:45,697 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 15 treesize of output 1 [2022-11-23 15:25:45,808 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:25:45,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 172 treesize of output 166 [2022-11-23 15:25:45,873 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:25:45,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 150 [2022-11-23 15:25:47,681 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 15 treesize of output 1 [2022-11-23 15:25:47,820 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 [2022-11-23 15:25:47,829 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 [2022-11-23 15:25:47,840 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 [2022-11-23 15:25:47,975 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:25:50,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6900#(and (= |ULTIMATE.start_main_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (<= 0 (+ 4 |ULTIMATE.start_main_~item~0#1.offset|)) (<= (+ 8 |ULTIMATE.start_main_~item~0#1.offset|) (select |#length| |ULTIMATE.start_main_~item~0#1.base|)) (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (= |ULTIMATE.start_main_~status~0#1| 1) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) |ULTIMATE.start_main_~item~0#1.offset|) (not (< 0 (select (select |#memory_int| |ULTIMATE.start_main_~item~0#1.base|) (+ 4 |ULTIMATE.start_main_~item~0#1.offset|)))) (or (not (= |ULTIMATE.start_main_~item~0#1.offset| 0)) (not (= |ULTIMATE.start_main_~item~0#1.base| 0))) (<= 0 |#StackHeapBarrier|) (= (select |#valid| |ULTIMATE.start_main_~item~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-23 15:25:50,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:25:50,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:25:50,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-11-23 15:25:50,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965066895] [2022-11-23 15:25:50,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:25:50,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 15:25:50,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 15:25:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 15:25:50,696 INFO L87 Difference]: Start difference. First operand 168 states and 183 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:52,716 INFO L93 Difference]: Finished difference Result 287 states and 308 transitions. [2022-11-23 15:25:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 15:25:52,716 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-23 15:25:52,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:52,717 INFO L225 Difference]: With dead ends: 287 [2022-11-23 15:25:52,718 INFO L226 Difference]: Without dead ends: 287 [2022-11-23 15:25:52,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=420, Invalid=3740, Unknown=0, NotChecked=0, Total=4160 [2022-11-23 15:25:52,720 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 536 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:52,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 1392 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 15:25:52,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-23 15:25:52,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 168. [2022-11-23 15:25:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 136 states have (on average 1.3308823529411764) internal successors, (181), 167 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 181 transitions. [2022-11-23 15:25:52,725 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 181 transitions. Word has length 34 [2022-11-23 15:25:52,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:52,725 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 181 transitions. [2022-11-23 15:25:52,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:52,725 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 181 transitions. [2022-11-23 15:25:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 15:25:52,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:52,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:52,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:52,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:52,936 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:52,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:52,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1341637657, now seen corresponding path program 1 times [2022-11-23 15:25:52,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:52,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113438120] [2022-11-23 15:25:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:52,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:53,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:25:53,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113438120] [2022-11-23 15:25:53,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113438120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:25:53,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461382207] [2022-11-23 15:25:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:53,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:53,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:25:53,256 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:25:53,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:25:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:25:53,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 15:25:53,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:25:53,389 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 [2022-11-23 15:25:53,460 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:25:53,460 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 [2022-11-23 15:25:53,502 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 [2022-11-23 15:25:53,588 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:25:53,588 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 [2022-11-23 15:25:53,631 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:25:53,632 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 [2022-11-23 15:25:53,853 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 25 treesize of output 13 [2022-11-23 15:25:53,893 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 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 15:25:53,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:53,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:25:54,046 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_669 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_669) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.base|))) (forall ((v_ArrVal_669 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_669) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1))) is different from false [2022-11-23 15:25:54,068 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_669 (Array Int Int))) (= 1 (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_669) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_669 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_669) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.base|))))) is different from false [2022-11-23 15:25:54,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:54,075 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-11-23 15:25:54,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:54,085 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 33 treesize of output 36 [2022-11-23 15:25:54,089 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 20 treesize of output 18 [2022-11-23 15:25:54,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:25:54,111 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 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-23 15:25:54,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:54,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-23 15:25:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:25:54,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461382207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:25:54,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [672984238] [2022-11-23 15:25:54,197 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-23 15:25:54,197 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:25:54,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:25:54,198 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:25:54,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:25:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,220 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 [2022-11-23 15:25:54,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,237 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 [2022-11-23 15:25:54,247 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 [2022-11-23 15:25:54,254 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 [2022-11-23 15:25:54,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,272 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 [2022-11-23 15:25:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,285 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 [2022-11-23 15:25:54,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,295 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 [2022-11-23 15:25:54,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,331 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 [2022-11-23 15:25:54,353 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 [2022-11-23 15:25:54,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,365 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 [2022-11-23 15:25:54,378 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 [2022-11-23 15:25:54,410 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:25:54,411 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 [2022-11-23 15:25:54,432 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:25:54,432 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 [2022-11-23 15:25:54,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,455 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 [2022-11-23 15:25:54,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:25:54,495 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 15:25:54,495 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 37 treesize of output 46 [2022-11-23 15:25:54,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,511 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:25:54,511 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 34 treesize of output 21 [2022-11-23 15:25:54,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,527 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:25:54,527 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 [2022-11-23 15:25:54,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:25:54,579 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 9 [2022-11-23 15:25:54,594 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 [2022-11-23 15:25:54,603 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 [2022-11-23 15:25:54,611 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 15 treesize of output 1 [2022-11-23 15:25:54,655 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 15 treesize of output 1 [2022-11-23 15:25:54,711 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:25:54,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 175 treesize of output 169 [2022-11-23 15:25:54,790 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:25:54,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 153 [2022-11-23 15:25:54,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:54,991 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 [2022-11-23 15:25:54,995 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 13 treesize of output 9 [2022-11-23 15:25:55,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:25:55,002 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 [2022-11-23 15:25:55,021 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 9 [2022-11-23 15:25:55,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:25:55,042 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 [2022-11-23 15:25:55,048 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 [2022-11-23 15:25:55,061 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 15 treesize of output 1 [2022-11-23 15:25:55,119 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 15 treesize of output 1 [2022-11-23 15:25:55,182 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:25:55,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 175 treesize of output 169 [2022-11-23 15:25:55,251 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:25:55,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 153 [2022-11-23 15:25:56,898 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 [2022-11-23 15:25:56,903 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 [2022-11-23 15:25:56,911 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 [2022-11-23 15:25:57,009 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 9 [2022-11-23 15:25:57,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-23 15:25:57,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-23 15:25:57,104 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:25:59,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7639#(and (not (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1)) (= |ULTIMATE.start_main_~status~0#1| 1) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:25:59,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:25:59,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:25:59,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-23 15:25:59,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943971713] [2022-11-23 15:25:59,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:25:59,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 15:25:59,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:25:59,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 15:25:59,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1604, Unknown=2, NotChecked=166, Total=1980 [2022-11-23 15:25:59,033 INFO L87 Difference]: Start difference. First operand 168 states and 181 transitions. Second operand has 22 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:25:59,485 INFO L93 Difference]: Finished difference Result 199 states and 215 transitions. [2022-11-23 15:25:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:25:59,485 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 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 36 [2022-11-23 15:25:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:25:59,486 INFO L225 Difference]: With dead ends: 199 [2022-11-23 15:25:59,486 INFO L226 Difference]: Without dead ends: 199 [2022-11-23 15:25:59,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=226, Invalid=1760, Unknown=2, NotChecked=174, Total=2162 [2022-11-23 15:25:59,488 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 497 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:25:59,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 650 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 551 Invalid, 0 Unknown, 262 Unchecked, 0.4s Time] [2022-11-23 15:25:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-23 15:25:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2022-11-23 15:25:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 154 states have (on average 1.3571428571428572) internal successors, (209), 185 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 209 transitions. [2022-11-23 15:25:59,493 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 209 transitions. Word has length 36 [2022-11-23 15:25:59,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:25:59,493 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 209 transitions. [2022-11-23 15:25:59,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:25:59,494 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 209 transitions. [2022-11-23 15:25:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 15:25:59,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:25:59,494 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:25:59,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:25:59,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:25:59,695 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr65REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:25:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:25:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1341637656, now seen corresponding path program 1 times [2022-11-23 15:25:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:25:59,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891009911] [2022-11-23 15:25:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:25:59,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:25:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:00,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:00,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891009911] [2022-11-23 15:26:00,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891009911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:00,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806576319] [2022-11-23 15:26:00,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:00,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:00,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:00,069 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:00,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:26:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:00,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 15:26:00,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:00,219 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 [2022-11-23 15:26:00,274 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 [2022-11-23 15:26:00,288 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:26:00,288 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 [2022-11-23 15:26:00,321 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 [2022-11-23 15:26:00,328 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 [2022-11-23 15:26:00,418 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:26:00,419 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 [2022-11-23 15:26:00,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:00,430 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 14 treesize of output 16 [2022-11-23 15:26:00,459 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:26:00,459 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 [2022-11-23 15:26:00,465 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 [2022-11-23 15:26:00,706 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 25 treesize of output 13 [2022-11-23 15:26:00,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-23 15:26:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:00,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:00,926 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_749 (Array Int Int)) (v_ArrVal_750 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_750) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_749) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_750 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_750) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2022-11-23 15:26:00,951 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_749 (Array Int Int)) (v_ArrVal_750 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_750) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_749) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_750 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_750) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2022-11-23 15:26:00,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:26:00,960 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 18 treesize of output 19 [2022-11-23 15:26:00,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:26:00,969 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 30 treesize of output 33 [2022-11-23 15:26:00,994 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 [2022-11-23 15:26:01,002 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:26:01,002 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 [2022-11-23 15:26:01,009 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:26:01,009 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 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-23 15:26:01,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:01,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2022-11-23 15:26:01,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:01,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2022-11-23 15:26:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:01,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806576319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:26:01,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28198956] [2022-11-23 15:26:01,143 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-23 15:26:01,143 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:26:01,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:26:01,143 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:26:01,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:26:01,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,163 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 [2022-11-23 15:26:01,178 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 [2022-11-23 15:26:01,185 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 [2022-11-23 15:26:01,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,196 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 [2022-11-23 15:26:01,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,218 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 [2022-11-23 15:26:01,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,234 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 [2022-11-23 15:26:01,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,244 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 [2022-11-23 15:26:01,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,274 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 [2022-11-23 15:26:01,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,301 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 [2022-11-23 15:26:01,311 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 [2022-11-23 15:26:01,321 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 [2022-11-23 15:26:01,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,367 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-23 15:26:01,367 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 [2022-11-23 15:26:01,392 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:26:01,392 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 [2022-11-23 15:26:01,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,404 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 [2022-11-23 15:26:01,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,434 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 [2022-11-23 15:26:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,445 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 41 treesize of output 24 [2022-11-23 15:26:01,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:01,460 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 [2022-11-23 15:26:01,516 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 9 [2022-11-23 15:26:01,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:26:01,536 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 [2022-11-23 15:26:01,544 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 15 treesize of output 1 [2022-11-23 15:26:01,551 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 [2022-11-23 15:26:01,657 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:26:01,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 172 treesize of output 166 [2022-11-23 15:26:01,718 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:26:01,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 150 [2022-11-23 15:26:02,736 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 15 treesize of output 1 [2022-11-23 15:26:02,779 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 [2022-11-23 15:26:02,783 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 [2022-11-23 15:26:02,798 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 [2022-11-23 15:26:02,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:26:02,835 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 9 [2022-11-23 15:26:02,844 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 [2022-11-23 15:26:02,850 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 [2022-11-23 15:26:02,856 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 15 treesize of output 1 [2022-11-23 15:26:02,896 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 15:26:02,897 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 52 treesize of output 43 [2022-11-23 15:26:02,917 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:26:02,917 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 [2022-11-23 15:26:02,939 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 15 treesize of output 1 [2022-11-23 15:26:02,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:02,984 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:26:02,985 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 65 treesize of output 58 [2022-11-23 15:26:02,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:03,015 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:26:03,015 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 57 treesize of output 54 [2022-11-23 15:26:03,027 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 13 treesize of output 9 [2022-11-23 15:26:03,054 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 9 [2022-11-23 15:26:03,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:26:03,069 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 15 treesize of output 1 [2022-11-23 15:26:03,078 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 [2022-11-23 15:26:03,085 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 11 treesize of output 7 [2022-11-23 15:26:03,126 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 15:26:03,127 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 52 treesize of output 43 [2022-11-23 15:26:03,146 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:26:03,146 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 [2022-11-23 15:26:03,164 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 15 treesize of output 1 [2022-11-23 15:26:03,196 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 13 treesize of output 9 [2022-11-23 15:26:03,223 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:26:03,223 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 72 treesize of output 69 [2022-11-23 15:26:03,252 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:26:03,253 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 68 treesize of output 57 [2022-11-23 15:26:03,402 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 9 [2022-11-23 15:26:03,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-23 15:26:03,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-23 15:26:03,513 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:26:05,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8286#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~status~0#1| 1) (<= |#NULL.offset| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (or (not (<= 0 |ULTIMATE.start_main_~head~0#1.offset|)) (not (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)))) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-23 15:26:05,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:26:05,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:26:05,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2022-11-23 15:26:05,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542574155] [2022-11-23 15:26:05,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:26:05,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 15:26:05,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:05,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 15:26:05,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1706, Unknown=2, NotChecked=170, Total=2070 [2022-11-23 15:26:05,599 INFO L87 Difference]: Start difference. First operand 186 states and 209 transitions. Second operand has 23 states, 22 states have (on average 4.909090909090909) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:06,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:06,440 INFO L93 Difference]: Finished difference Result 198 states and 214 transitions. [2022-11-23 15:26:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:26:06,441 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.909090909090909) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-23 15:26:06,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:06,442 INFO L225 Difference]: With dead ends: 198 [2022-11-23 15:26:06,442 INFO L226 Difference]: Without dead ends: 198 [2022-11-23 15:26:06,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=312, Invalid=2346, Unknown=2, NotChecked=202, Total=2862 [2022-11-23 15:26:06,443 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 821 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:06,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 437 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 428 Invalid, 0 Unknown, 346 Unchecked, 0.4s Time] [2022-11-23 15:26:06,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-23 15:26:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2022-11-23 15:26:06,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 154 states have (on average 1.3506493506493507) internal successors, (208), 185 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 208 transitions. [2022-11-23 15:26:06,448 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 208 transitions. Word has length 36 [2022-11-23 15:26:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:06,448 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 208 transitions. [2022-11-23 15:26:06,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.909090909090909) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:06,449 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 208 transitions. [2022-11-23 15:26:06,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 15:26:06,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:06,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:06,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:06,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:06,655 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:26:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:06,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1341636589, now seen corresponding path program 1 times [2022-11-23 15:26:06,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:06,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207974169] [2022-11-23 15:26:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:06,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:26:06,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:06,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207974169] [2022-11-23 15:26:06,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207974169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:06,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861624332] [2022-11-23 15:26:06,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:06,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:06,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:06,748 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:06,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:26:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:06,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:26:06,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:06,942 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 25 treesize of output 17 [2022-11-23 15:26:06,945 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 21 treesize of output 13 [2022-11-23 15:26:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:26:06,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:26:07,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861624332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:26:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536626695] [2022-11-23 15:26:07,030 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-23 15:26:07,030 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:26:07,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:26:07,032 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:26:07,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:26:07,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,052 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 [2022-11-23 15:26:07,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,067 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 [2022-11-23 15:26:07,073 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 [2022-11-23 15:26:07,079 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 [2022-11-23 15:26:07,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,096 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 [2022-11-23 15:26:07,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,107 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 [2022-11-23 15:26:07,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,115 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 [2022-11-23 15:26:07,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,146 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 [2022-11-23 15:26:07,169 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 [2022-11-23 15:26:07,179 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 [2022-11-23 15:26:07,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,188 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 [2022-11-23 15:26:07,220 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:26:07,221 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 [2022-11-23 15:26:07,238 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:26:07,239 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 [2022-11-23 15:26:07,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,253 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 39 treesize of output 33 [2022-11-23 15:26:07,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,277 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 [2022-11-23 15:26:07,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,289 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 [2022-11-23 15:26:07,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,305 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 [2022-11-23 15:26:07,445 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-23 15:26:07,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 300 [2022-11-23 15:26:07,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:07,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:07,550 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 15:26:07,550 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 331 treesize of output 314 [2022-11-23 15:26:07,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:07,597 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-23 15:26:07,598 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 327 treesize of output 330 [2022-11-23 15:26:07,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:07,641 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-23 15:26:07,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 331 treesize of output 325 [2022-11-23 15:26:07,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:07,920 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-23 15:26:07,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 466 treesize of output 363 [2022-11-23 15:26:07,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:07,973 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-23 15:26:07,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 412 [2022-11-23 15:26:07,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:07,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:08,046 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-23 15:26:08,047 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 9 case distinctions, treesize of input 406 treesize of output 389 [2022-11-23 15:26:08,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:08,181 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:26:08,181 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 41 treesize of output 24 [2022-11-23 15:26:08,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:08,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:08,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:08,205 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 15:26:08,205 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 37 treesize of output 46 [2022-11-23 15:26:08,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:08,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:08,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:08,223 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:26:08,223 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 [2022-11-23 15:26:08,334 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-23 15:26:08,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 300 [2022-11-23 15:26:08,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:08,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:08,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:08,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:08,423 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 15:26:08,424 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 331 treesize of output 314 [2022-11-23 15:26:08,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:08,474 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-23 15:26:08,474 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 327 treesize of output 330 [2022-11-23 15:26:08,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:08,517 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-23 15:26:08,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 331 treesize of output 325 [2022-11-23 15:26:08,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:08,798 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-23 15:26:08,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 466 treesize of output 363 [2022-11-23 15:26:08,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:08,851 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-23 15:26:08,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 412 [2022-11-23 15:26:08,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:08,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:08,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:08,921 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-23 15:26:08,921 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 9 case distinctions, treesize of input 406 treesize of output 389 [2022-11-23 15:26:09,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:09,100 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:26:09,100 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 41 treesize of output 24 [2022-11-23 15:26:09,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:09,114 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:26:09,114 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 [2022-11-23 15:26:09,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:09,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:09,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:09,130 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 [2022-11-23 15:26:09,925 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:26:18,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8927#(and (= |ULTIMATE.start_main_~head~0#1.base| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~status~0#1| 1) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-23 15:26:18,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:26:18,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:26:18,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-11-23 15:26:18,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864898602] [2022-11-23 15:26:18,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:26:18,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:26:18,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:18,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:26:18,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-11-23 15:26:18,183 INFO L87 Difference]: Start difference. First operand 186 states and 208 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:18,349 INFO L93 Difference]: Finished difference Result 210 states and 234 transitions. [2022-11-23 15:26:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:26:18,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 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 36 [2022-11-23 15:26:18,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:18,351 INFO L225 Difference]: With dead ends: 210 [2022-11-23 15:26:18,351 INFO L226 Difference]: Without dead ends: 210 [2022-11-23 15:26:18,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-23 15:26:18,352 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 145 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:18,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 358 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:26:18,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-23 15:26:18,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2022-11-23 15:26:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 172 states have (on average 1.3546511627906976) internal successors, (233), 203 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 233 transitions. [2022-11-23 15:26:18,357 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 233 transitions. Word has length 36 [2022-11-23 15:26:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:18,358 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 233 transitions. [2022-11-23 15:26:18,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:18,358 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 233 transitions. [2022-11-23 15:26:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 15:26:18,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:18,359 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:18,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-23 15:26:18,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 15:26:18,567 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:26:18,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash 987749477, now seen corresponding path program 1 times [2022-11-23 15:26:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:18,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110761498] [2022-11-23 15:26:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:18,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:26:18,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:18,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110761498] [2022-11-23 15:26:18,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110761498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:26:18,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:26:18,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:26:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119601151] [2022-11-23 15:26:18,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:26:18,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:26:18,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:18,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:26:18,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:26:18,615 INFO L87 Difference]: Start difference. First operand 204 states and 233 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:18,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:18,679 INFO L93 Difference]: Finished difference Result 257 states and 290 transitions. [2022-11-23 15:26:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:26:18,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-23 15:26:18,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:18,680 INFO L225 Difference]: With dead ends: 257 [2022-11-23 15:26:18,681 INFO L226 Difference]: Without dead ends: 257 [2022-11-23 15:26:18,681 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 [2022-11-23 15:26:18,682 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 54 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:18,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 216 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:26:18,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-23 15:26:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 221. [2022-11-23 15:26:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 189 states have (on average 1.3280423280423281) internal successors, (251), 220 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 251 transitions. [2022-11-23 15:26:18,687 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 251 transitions. Word has length 36 [2022-11-23 15:26:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:18,688 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 251 transitions. [2022-11-23 15:26:18,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 251 transitions. [2022-11-23 15:26:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 15:26:18,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:18,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:18,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-23 15:26:18,689 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:26:18,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:18,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1358906689, now seen corresponding path program 1 times [2022-11-23 15:26:18,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:18,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202911490] [2022-11-23 15:26:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:18,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:18,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:18,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202911490] [2022-11-23 15:26:18,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202911490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:18,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71709789] [2022-11-23 15:26:18,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:18,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:18,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:18,980 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:18,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:26:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:19,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 15:26:19,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:19,137 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 [2022-11-23 15:26:19,203 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:26:19,204 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 [2022-11-23 15:26:19,234 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 [2022-11-23 15:26:19,239 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 [2022-11-23 15:26:19,271 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 [2022-11-23 15:26:19,297 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 14 treesize of output 16 [2022-11-23 15:26:19,313 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 14 treesize of output 16 [2022-11-23 15:26:19,411 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 15 treesize of output 7 [2022-11-23 15:26:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:19,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:19,515 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_951 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_951) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0)) is different from false [2022-11-23 15:26:19,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:26:19,522 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 18 treesize of output 19 [2022-11-23 15:26:19,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:26:19,531 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 30 treesize of output 33 [2022-11-23 15:26:19,536 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 [2022-11-23 15:26:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:19,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71709789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:26:19,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [990674840] [2022-11-23 15:26:19,628 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-23 15:26:19,629 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:26:19,629 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:26:19,629 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:26:19,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:26:19,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,646 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 [2022-11-23 15:26:19,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,662 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 [2022-11-23 15:26:19,670 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 [2022-11-23 15:26:19,677 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 [2022-11-23 15:26:19,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,695 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 [2022-11-23 15:26:19,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,705 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 [2022-11-23 15:26:19,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,713 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 [2022-11-23 15:26:19,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,743 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 [2022-11-23 15:26:19,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,764 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 [2022-11-23 15:26:19,773 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 [2022-11-23 15:26:19,782 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 [2022-11-23 15:26:19,815 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:26:19,816 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 [2022-11-23 15:26:19,835 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:26:19,836 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 [2022-11-23 15:26:19,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,852 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 39 treesize of output 33 [2022-11-23 15:26:19,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,875 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 [2022-11-23 15:26:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,891 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 [2022-11-23 15:26:19,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:19,906 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 [2022-11-23 15:26:20,025 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-23 15:26:20,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 300 [2022-11-23 15:26:20,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:20,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:20,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:20,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:20,109 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 15:26:20,110 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 331 treesize of output 314 [2022-11-23 15:26:20,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:20,140 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-23 15:26:20,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 321 [2022-11-23 15:26:20,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:20,183 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-23 15:26:20,183 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 320 treesize of output 323 [2022-11-23 15:26:20,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:20,397 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-23 15:26:20,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 466 treesize of output 363 [2022-11-23 15:26:20,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:20,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:20,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:20,481 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-23 15:26:20,482 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 9 case distinctions, treesize of input 422 treesize of output 405 [2022-11-23 15:26:20,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:20,527 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-23 15:26:20,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 412 [2022-11-23 15:26:20,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:20,665 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:26:20,665 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 [2022-11-23 15:26:20,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:20,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:20,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:20,682 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 [2022-11-23 15:26:20,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:20,694 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 41 treesize of output 24 [2022-11-23 15:26:20,809 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-23 15:26:20,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 300 [2022-11-23 15:26:20,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:20,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:20,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:20,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:20,904 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 15:26:20,904 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 331 treesize of output 314 [2022-11-23 15:26:20,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:20,944 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-23 15:26:20,945 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 327 treesize of output 330 [2022-11-23 15:26:20,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:20,982 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-23 15:26:20,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 331 treesize of output 325 [2022-11-23 15:26:21,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:21,222 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-23 15:26:21,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 466 treesize of output 363 [2022-11-23 15:26:21,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:21,273 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-23 15:26:21,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 412 [2022-11-23 15:26:21,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:21,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:21,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:21,345 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-23 15:26:21,345 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 9 case distinctions, treesize of input 406 treesize of output 389 [2022-11-23 15:26:21,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:21,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:21,458 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-23 15:26:21,459 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 37 treesize of output 46 [2022-11-23 15:26:21,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:21,476 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:26:21,477 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 [2022-11-23 15:26:21,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:21,492 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 [2022-11-23 15:26:22,317 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:26:30,624 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10079#(and (not (= |ULTIMATE.start_main_~item~0#1.offset| 0)) (= |ULTIMATE.start_main_~status~0#1| 1) (exists ((|v_ULTIMATE.start_main_~head~0#1.offset_83| Int) (|v_ULTIMATE.start_main_~head~0#1.base_94| Int)) (and (<= (+ |v_ULTIMATE.start_main_~head~0#1.offset_83| 4) (select |#length| |v_ULTIMATE.start_main_~head~0#1.base_94|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~head~0#1.base_94|) |v_ULTIMATE.start_main_~head~0#1.offset_83|) |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |v_ULTIMATE.start_main_~head~0#1.offset_83|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~head~0#1.base_94|) |v_ULTIMATE.start_main_~head~0#1.offset_83|) |ULTIMATE.start_main_~head~0#1.base|) (= (select |#valid| |v_ULTIMATE.start_main_~head~0#1.base_94|) 1))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:26:30,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:26:30,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:26:30,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-11-23 15:26:30,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752390682] [2022-11-23 15:26:30,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:26:30,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 15:26:30,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:30,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 15:26:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1024, Unknown=5, NotChecked=68, Total=1332 [2022-11-23 15:26:30,627 INFO L87 Difference]: Start difference. First operand 221 states and 251 transitions. Second operand has 20 states, 19 states have (on average 4.105263157894737) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:31,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:31,283 INFO L93 Difference]: Finished difference Result 236 states and 261 transitions. [2022-11-23 15:26:31,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 15:26:31,283 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.105263157894737) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 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 37 [2022-11-23 15:26:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:31,287 INFO L225 Difference]: With dead ends: 236 [2022-11-23 15:26:31,287 INFO L226 Difference]: Without dead ends: 236 [2022-11-23 15:26:31,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 70 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=429, Invalid=1640, Unknown=5, NotChecked=88, Total=2162 [2022-11-23 15:26:31,293 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 588 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 36 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:31,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 709 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 553 Invalid, 3 Unknown, 171 Unchecked, 0.4s Time] [2022-11-23 15:26:31,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-11-23 15:26:31,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 222. [2022-11-23 15:26:31,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 190 states have (on average 1.3263157894736841) internal successors, (252), 221 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:31,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 252 transitions. [2022-11-23 15:26:31,298 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 252 transitions. Word has length 37 [2022-11-23 15:26:31,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:31,299 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 252 transitions. [2022-11-23 15:26:31,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.105263157894737) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:31,299 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 252 transitions. [2022-11-23 15:26:31,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 15:26:31,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:31,300 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:31,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:31,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 15:26:31,505 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:26:31,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:31,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1587622470, now seen corresponding path program 1 times [2022-11-23 15:26:31,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:31,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718688230] [2022-11-23 15:26:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:31,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:32,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:32,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718688230] [2022-11-23 15:26:32,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718688230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:32,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273872327] [2022-11-23 15:26:32,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:32,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:32,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:32,076 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:32,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:26:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:32,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 15:26:32,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:32,230 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 [2022-11-23 15:26:32,300 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:26:32,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-23 15:26:32,334 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 [2022-11-23 15:26:32,427 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:26:32,427 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 30 treesize of output 28 [2022-11-23 15:26:32,455 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:26:32,455 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 30 treesize of output 28 [2022-11-23 15:26:32,528 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:26:32,528 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 [2022-11-23 15:26:32,570 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:26:32,570 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 35 treesize of output 26 [2022-11-23 15:26:32,675 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-23 15:26:32,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 48 [2022-11-23 15:26:32,686 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 12 treesize of output 8 [2022-11-23 15:26:32,791 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-23 15:26:32,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 55 [2022-11-23 15:26:32,805 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 16 treesize of output 12 [2022-11-23 15:26:32,915 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 24 treesize of output 12 [2022-11-23 15:26:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:32,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:33,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:26:33,159 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-23 15:26:33,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:26:33,277 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 24 treesize of output 25 [2022-11-23 15:26:33,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:26:33,286 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 73 treesize of output 76 [2022-11-23 15:26:33,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:26:33,303 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 69 treesize of output 65 [2022-11-23 15:26:33,314 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 50 treesize of output 46 [2022-11-23 15:26:33,325 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-23 15:26:33,325 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 13 treesize of output 12 [2022-11-23 15:26:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:33,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273872327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:26:33,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [788916342] [2022-11-23 15:26:33,541 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-23 15:26:33,541 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:26:33,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:26:33,542 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:26:33,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:26:33,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,562 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 [2022-11-23 15:26:33,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,577 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 [2022-11-23 15:26:33,584 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 [2022-11-23 15:26:33,590 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 [2022-11-23 15:26:33,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,606 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 [2022-11-23 15:26:33,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,613 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 [2022-11-23 15:26:33,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,623 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 [2022-11-23 15:26:33,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,655 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 [2022-11-23 15:26:33,676 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 [2022-11-23 15:26:33,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,686 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 [2022-11-23 15:26:33,696 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 [2022-11-23 15:26:33,726 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:26:33,727 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 [2022-11-23 15:26:33,747 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:26:33,748 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 [2022-11-23 15:26:33,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,765 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 [2022-11-23 15:26:33,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,791 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:26:33,791 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 34 treesize of output 21 [2022-11-23 15:26:33,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,805 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:26:33,805 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 [2022-11-23 15:26:33,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:33,820 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 [2022-11-23 15:26:33,939 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-23 15:26:33,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 300 [2022-11-23 15:26:34,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:34,026 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-23 15:26:34,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 321 [2022-11-23 15:26:34,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:34,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:34,070 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 15:26:34,071 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 331 treesize of output 314 [2022-11-23 15:26:34,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:34,112 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-23 15:26:34,113 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 327 treesize of output 330 [2022-11-23 15:26:34,407 INFO L321 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-11-23 15:26:34,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 519 treesize of output 392 [2022-11-23 15:26:34,452 INFO L321 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2022-11-23 15:26:34,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 470 treesize of output 447 [2022-11-23 15:26:34,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,532 INFO L321 Elim1Store]: treesize reduction 212, result has 16.2 percent of original size [2022-11-23 15:26:34,532 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 9 case distinctions, treesize of input 427 treesize of output 410 [2022-11-23 15:26:34,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,659 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-23 15:26:34,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 204 treesize of output 141 [2022-11-23 15:26:34,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 89 [2022-11-23 15:26:34,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,697 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 48 treesize of output 56 [2022-11-23 15:26:34,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,734 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:26:34,734 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 [2022-11-23 15:26:34,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,750 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 [2022-11-23 15:26:34,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:34,763 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 41 treesize of output 24 [2022-11-23 15:26:34,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:26:34,816 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 9 [2022-11-23 15:26:34,827 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 15 treesize of output 1 [2022-11-23 15:26:34,833 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 [2022-11-23 15:26:34,841 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 [2022-11-23 15:26:34,886 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 15 treesize of output 1 [2022-11-23 15:26:34,942 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:26:34,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 163 [2022-11-23 15:26:35,019 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:26:35,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 147 [2022-11-23 15:26:37,268 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 [2022-11-23 15:26:37,273 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 [2022-11-23 15:26:37,279 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 [2022-11-23 15:26:37,301 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 [2022-11-23 15:26:37,310 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 [2022-11-23 15:26:37,315 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 [2022-11-23 15:26:37,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:26:37,343 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 9 [2022-11-23 15:26:37,351 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 [2022-11-23 15:26:37,357 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 [2022-11-23 15:26:37,364 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 15 treesize of output 1 [2022-11-23 15:26:37,381 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 15 treesize of output 1 [2022-11-23 15:26:37,407 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 15:26:37,407 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 52 treesize of output 43 [2022-11-23 15:26:37,428 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:26:37,428 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 [2022-11-23 15:26:37,480 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 13 treesize of output 9 [2022-11-23 15:26:37,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:37,507 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:26:37,507 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 65 treesize of output 62 [2022-11-23 15:26:37,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:37,536 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:26:37,536 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 61 treesize of output 54 [2022-11-23 15:26:37,568 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 13 treesize of output 9 [2022-11-23 15:26:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:37,594 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:26:37,595 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 65 treesize of output 62 [2022-11-23 15:26:37,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:37,623 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:26:37,624 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 61 treesize of output 54 [2022-11-23 15:26:37,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:26:37,684 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 9 [2022-11-23 15:26:37,694 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 11 treesize of output 7 [2022-11-23 15:26:37,698 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 15 treesize of output 1 [2022-11-23 15:26:37,704 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 [2022-11-23 15:26:37,755 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 15:26:37,756 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 52 treesize of output 43 [2022-11-23 15:26:37,776 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:26:37,776 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 [2022-11-23 15:26:37,793 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 15 treesize of output 1 [2022-11-23 15:26:37,817 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 13 treesize of output 9 [2022-11-23 15:26:37,846 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:26:37,846 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 72 treesize of output 69 [2022-11-23 15:26:37,875 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:26:37,875 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 68 treesize of output 57 [2022-11-23 15:26:37,951 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:26:37,951 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 72 treesize of output 61 [2022-11-23 15:26:37,980 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:26:37,981 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 64 treesize of output 61 [2022-11-23 15:26:38,010 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 13 treesize of output 9 [2022-11-23 15:26:38,047 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:26:40,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10824#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~status~0#1| 2) (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (<= 0 |ULTIMATE.start_main_~item~0#1.offset|) (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0) (<= |#NULL.base| 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0))' at error location [2022-11-23 15:26:40,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:26:40,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:26:40,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 34 [2022-11-23 15:26:40,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330950786] [2022-11-23 15:26:40,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:26:40,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 15:26:40,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:40,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 15:26:40,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2599, Unknown=10, NotChecked=0, Total=2862 [2022-11-23 15:26:40,106 INFO L87 Difference]: Start difference. First operand 222 states and 252 transitions. Second operand has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:43,136 INFO L93 Difference]: Finished difference Result 290 states and 327 transitions. [2022-11-23 15:26:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 15:26:43,137 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 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 37 [2022-11-23 15:26:43,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:43,138 INFO L225 Difference]: With dead ends: 290 [2022-11-23 15:26:43,138 INFO L226 Difference]: Without dead ends: 290 [2022-11-23 15:26:43,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=716, Invalid=5272, Unknown=18, NotChecked=0, Total=6006 [2022-11-23 15:26:43,140 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1024 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:43,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 1035 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:26:43,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-23 15:26:43,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 220. [2022-11-23 15:26:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 219 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 250 transitions. [2022-11-23 15:26:43,146 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 250 transitions. Word has length 37 [2022-11-23 15:26:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:43,146 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 250 transitions. [2022-11-23 15:26:43,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:43,147 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 250 transitions. [2022-11-23 15:26:43,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 15:26:43,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:43,148 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:43,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:43,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:43,353 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:26:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:43,354 INFO L85 PathProgramCache]: Analyzing trace with hash -823565154, now seen corresponding path program 1 times [2022-11-23 15:26:43,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:43,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014754486] [2022-11-23 15:26:43,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:43,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:43,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:43,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014754486] [2022-11-23 15:26:43,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014754486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:43,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789122512] [2022-11-23 15:26:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:43,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:43,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:43,659 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:43,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:26:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:43,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:26:43,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:43,824 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 [2022-11-23 15:26:43,882 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:26:43,883 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 [2022-11-23 15:26:43,920 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 [2022-11-23 15:26:43,997 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:26:43,997 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 29 treesize of output 27 [2022-11-23 15:26:44,023 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:26:44,024 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 26 treesize of output 27 [2022-11-23 15:26:44,164 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 23 treesize of output 11 [2022-11-23 15:26:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:44,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:44,246 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1143 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1143) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-23 15:26:44,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:26:44,289 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 [2022-11-23 15:26:44,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:26:44,297 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 [2022-11-23 15:26:44,300 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 7 treesize of output 5 [2022-11-23 15:26:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:44,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789122512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:26:44,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [273732892] [2022-11-23 15:26:44,382 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-23 15:26:44,383 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:26:44,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:26:44,383 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:26:44,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:26:44,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,404 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 [2022-11-23 15:26:44,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,418 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 [2022-11-23 15:26:44,425 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 [2022-11-23 15:26:44,431 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 [2022-11-23 15:26:44,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,444 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 [2022-11-23 15:26:44,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,453 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 [2022-11-23 15:26:44,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,463 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 [2022-11-23 15:26:44,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,487 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 [2022-11-23 15:26:44,506 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 [2022-11-23 15:26:44,516 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 [2022-11-23 15:26:44,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,525 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 [2022-11-23 15:26:44,554 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:26:44,554 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 [2022-11-23 15:26:44,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,566 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 [2022-11-23 15:26:44,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:44,588 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:26:44,589 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 [2022-11-23 15:26:44,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,611 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 41 treesize of output 24 [2022-11-23 15:26:44,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,624 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 [2022-11-23 15:26:44,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,637 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 [2022-11-23 15:26:44,744 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-23 15:26:44,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 300 [2022-11-23 15:26:44,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:44,855 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-23 15:26:44,856 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 327 treesize of output 330 [2022-11-23 15:26:44,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:44,898 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-23 15:26:44,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 331 treesize of output 325 [2022-11-23 15:26:44,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:44,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:44,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:44,942 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 15:26:44,943 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 335 treesize of output 318 [2022-11-23 15:26:45,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:45,156 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-23 15:26:45,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 466 treesize of output 363 [2022-11-23 15:26:45,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:45,215 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-23 15:26:45,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 412 [2022-11-23 15:26:45,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:45,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:45,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:45,286 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-23 15:26:45,287 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 9 case distinctions, treesize of input 406 treesize of output 389 [2022-11-23 15:26:45,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:45,526 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:26:45,526 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 41 treesize of output 24 [2022-11-23 15:26:45,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:45,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:45,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:45,550 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 15:26:45,551 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 37 treesize of output 46 [2022-11-23 15:26:45,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:45,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:45,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:45,567 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:26:45,568 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 [2022-11-23 15:26:45,689 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-23 15:26:45,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 300 [2022-11-23 15:26:45,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:45,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:45,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:45,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:45,777 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 15:26:45,778 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 331 treesize of output 314 [2022-11-23 15:26:45,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:45,817 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-23 15:26:45,817 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 327 treesize of output 330 [2022-11-23 15:26:45,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:26:45,854 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-23 15:26:45,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 331 treesize of output 325 [2022-11-23 15:26:46,092 INFO L321 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-11-23 15:26:46,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 519 treesize of output 392 [2022-11-23 15:26:46,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:46,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:46,180 INFO L321 Elim1Store]: treesize reduction 212, result has 16.2 percent of original size [2022-11-23 15:26:46,181 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 9 case distinctions, treesize of input 451 treesize of output 434 [2022-11-23 15:26:46,225 INFO L321 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2022-11-23 15:26:46,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 470 treesize of output 447 [2022-11-23 15:26:46,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:46,399 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 15:26:46,400 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 41 treesize of output 24 [2022-11-23 15:26:46,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:46,413 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:26:46,413 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 [2022-11-23 15:26:46,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:46,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:46,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:26:46,429 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 [2022-11-23 15:26:47,195 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:26:54,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [273732892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:26:54,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:26:54,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [9, 8, 8] total 34 [2022-11-23 15:26:54,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203155503] [2022-11-23 15:26:54,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:26:54,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 15:26:54,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:26:54,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 15:26:54,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=913, Unknown=3, NotChecked=64, Total=1190 [2022-11-23 15:26:54,550 INFO L87 Difference]: Start difference. First operand 220 states and 250 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 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) [2022-11-23 15:26:58,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:26:58,070 INFO L93 Difference]: Finished difference Result 243 states and 268 transitions. [2022-11-23 15:26:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:26:58,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 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 38 [2022-11-23 15:26:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:26:58,072 INFO L225 Difference]: With dead ends: 243 [2022-11-23 15:26:58,072 INFO L226 Difference]: Without dead ends: 243 [2022-11-23 15:26:58,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 70 SyntacticMatches, 19 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=319, Invalid=1322, Unknown=3, NotChecked=78, Total=1722 [2022-11-23 15:26:58,074 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 91 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:26:58,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 468 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 15:26:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-23 15:26:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 225. [2022-11-23 15:26:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 194 states have (on average 1.3350515463917525) internal successors, (259), 224 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:26:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 259 transitions. [2022-11-23 15:26:58,081 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 259 transitions. Word has length 38 [2022-11-23 15:26:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:26:58,082 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 259 transitions. [2022-11-23 15:26:58,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 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) [2022-11-23 15:26:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 259 transitions. [2022-11-23 15:26:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 15:26:58,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:26:58,083 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:26:58,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:26:58,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 15:26:58,289 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:26:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:26:58,289 INFO L85 PathProgramCache]: Analyzing trace with hash -991671295, now seen corresponding path program 1 times [2022-11-23 15:26:58,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:26:58,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996174982] [2022-11-23 15:26:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:58,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:26:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:58,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:26:58,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996174982] [2022-11-23 15:26:58,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996174982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:26:58,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003309255] [2022-11-23 15:26:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:26:58,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:26:58,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:26:58,823 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:26:58,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:26:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:26:58,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 15:26:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:26:59,015 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 [2022-11-23 15:26:59,085 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:26:59,086 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 [2022-11-23 15:26:59,131 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 [2022-11-23 15:26:59,240 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:26:59,240 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 22 treesize of output 22 [2022-11-23 15:26:59,270 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:26:59,270 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 22 treesize of output 22 [2022-11-23 15:26:59,337 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:26:59,337 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 [2022-11-23 15:26:59,384 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:26:59,385 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 27 treesize of output 22 [2022-11-23 15:26:59,519 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-23 15:26:59,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 49 [2022-11-23 15:26:59,529 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 12 treesize of output 8 [2022-11-23 15:26:59,649 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-23 15:26:59,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 56 [2022-11-23 15:26:59,785 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 25 treesize of output 13 [2022-11-23 15:26:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:26:59,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:26:59,955 INFO L321 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2022-11-23 15:26:59,955 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 27 treesize of output 26 [2022-11-23 15:27:00,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:27:00,096 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-11-23 15:27:00,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:27:00,209 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 23 treesize of output 24 [2022-11-23 15:27:00,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:27:00,218 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 134 treesize of output 133 [2022-11-23 15:27:00,226 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 118 treesize of output 110 [2022-11-23 15:27:00,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:27:00,244 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 118 treesize of output 108 [2022-11-23 15:27:00,259 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-23 15:27:00,259 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 13 treesize of output 12 [2022-11-23 15:27:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:00,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003309255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:27:00,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1253620143] [2022-11-23 15:27:00,398 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-23 15:27:00,399 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:27:00,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:27:00,399 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:27:00,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:27:00,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,428 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 [2022-11-23 15:27:00,440 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 [2022-11-23 15:27:00,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,449 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 [2022-11-23 15:27:00,457 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 [2022-11-23 15:27:00,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,473 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 [2022-11-23 15:27:00,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,483 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 [2022-11-23 15:27:00,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,491 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 [2022-11-23 15:27:00,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,524 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 [2022-11-23 15:27:00,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,547 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 [2022-11-23 15:27:00,557 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 [2022-11-23 15:27:00,567 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 [2022-11-23 15:27:00,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,611 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-23 15:27:00,611 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 [2022-11-23 15:27:00,638 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:27:00,639 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 [2022-11-23 15:27:00,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,662 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 [2022-11-23 15:27:00,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,696 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:27:00,696 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 34 treesize of output 21 [2022-11-23 15:27:00,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:27:00,721 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 15:27:00,721 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 47 treesize of output 56 [2022-11-23 15:27:00,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:00,740 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:27:00,740 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 [2022-11-23 15:27:00,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:27:00,845 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 9 [2022-11-23 15:27:00,859 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 [2022-11-23 15:27:00,865 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 15 treesize of output 1 [2022-11-23 15:27:00,874 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 [2022-11-23 15:27:00,969 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:27:00,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 175 treesize of output 193 [2022-11-23 15:27:01,041 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:27:01,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 153 [2022-11-23 15:27:02,315 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 15 treesize of output 1 [2022-11-23 15:27:02,383 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 [2022-11-23 15:27:02,389 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 [2022-11-23 15:27:02,394 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 [2022-11-23 15:27:02,416 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 [2022-11-23 15:27:02,424 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 [2022-11-23 15:27:02,429 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 [2022-11-23 15:27:02,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:27:02,452 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 9 [2022-11-23 15:27:02,464 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 [2022-11-23 15:27:02,470 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 15 treesize of output 1 [2022-11-23 15:27:02,475 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 [2022-11-23 15:27:02,514 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 15:27:02,514 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 52 treesize of output 43 [2022-11-23 15:27:02,535 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:27:02,535 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 [2022-11-23 15:27:02,552 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 15 treesize of output 1 [2022-11-23 15:27:02,587 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 13 treesize of output 9 [2022-11-23 15:27:02,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:02,616 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:02,616 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 65 treesize of output 62 [2022-11-23 15:27:02,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:02,644 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:02,645 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 61 treesize of output 54 [2022-11-23 15:27:02,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:02,692 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:02,693 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 65 treesize of output 62 [2022-11-23 15:27:02,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:02,722 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:02,722 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 61 treesize of output 54 [2022-11-23 15:27:02,734 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 13 treesize of output 9 [2022-11-23 15:27:02,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:27:02,805 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 9 [2022-11-23 15:27:02,821 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 [2022-11-23 15:27:02,827 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 15 treesize of output 1 [2022-11-23 15:27:02,834 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 [2022-11-23 15:27:02,874 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 15:27:02,875 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 52 treesize of output 43 [2022-11-23 15:27:02,895 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:27:02,896 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 [2022-11-23 15:27:02,913 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 15 treesize of output 1 [2022-11-23 15:27:02,960 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:02,960 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 72 treesize of output 61 [2022-11-23 15:27:02,990 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:02,990 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 64 treesize of output 61 [2022-11-23 15:27:03,018 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 13 treesize of output 9 [2022-11-23 15:27:03,076 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:03,076 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 72 treesize of output 69 [2022-11-23 15:27:03,105 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:03,105 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 68 treesize of output 57 [2022-11-23 15:27:03,134 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 13 treesize of output 9 [2022-11-23 15:27:03,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:27:05,483 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12401#(and (<= 0 |#NULL.base|) (not (= (select |#valid| |ULTIMATE.start_main_#t~mem7#1.base|) 1)) (= |ULTIMATE.start_main_~status~0#1| 2) (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (= |ULTIMATE.start_main_#t~mem7#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem7#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (<= 0 |ULTIMATE.start_main_~item~0#1.offset|) (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0))) (<= |#NULL.offset| 0) (<= |#NULL.base| 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-23 15:27:05,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:27:05,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:27:05,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2022-11-23 15:27:05,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232267987] [2022-11-23 15:27:05,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:27:05,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 15:27:05,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:05,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 15:27:05,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=2578, Unknown=23, NotChecked=0, Total=2862 [2022-11-23 15:27:05,486 INFO L87 Difference]: Start difference. First operand 225 states and 259 transitions. Second operand has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:09,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:09,570 INFO L93 Difference]: Finished difference Result 297 states and 338 transitions. [2022-11-23 15:27:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 15:27:09,571 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-23 15:27:09,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:09,573 INFO L225 Difference]: With dead ends: 297 [2022-11-23 15:27:09,573 INFO L226 Difference]: Without dead ends: 297 [2022-11-23 15:27:09,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=548, Invalid=4541, Unknown=23, NotChecked=0, Total=5112 [2022-11-23 15:27:09,575 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 714 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:09,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1166 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:27:09,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-23 15:27:09,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 258. [2022-11-23 15:27:09,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 227 states have (on average 1.3127753303964758) internal successors, (298), 257 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 298 transitions. [2022-11-23 15:27:09,580 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 298 transitions. Word has length 39 [2022-11-23 15:27:09,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:09,580 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 298 transitions. [2022-11-23 15:27:09,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:09,581 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 298 transitions. [2022-11-23 15:27:09,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 15:27:09,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:09,581 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:09,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:27:09,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 15:27:09,782 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:27:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:09,782 INFO L85 PathProgramCache]: Analyzing trace with hash -991671294, now seen corresponding path program 1 times [2022-11-23 15:27:09,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:09,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160035652] [2022-11-23 15:27:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:09,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:10,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:10,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160035652] [2022-11-23 15:27:10,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160035652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:27:10,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957941761] [2022-11-23 15:27:10,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:10,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:27:10,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:27:10,583 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:27:10,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:27:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:10,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-23 15:27:10,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:27:10,778 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 [2022-11-23 15:27:10,878 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:27:10,878 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 [2022-11-23 15:27:10,923 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 [2022-11-23 15:27:10,930 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 [2022-11-23 15:27:11,058 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:27:11,059 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 22 treesize of output 22 [2022-11-23 15:27:11,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:11,075 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 14 treesize of output 16 [2022-11-23 15:27:11,163 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:27:11,163 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 [2022-11-23 15:27:11,168 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 [2022-11-23 15:27:11,191 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 15:27:11,191 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 22 treesize of output 22 [2022-11-23 15:27:11,354 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:27:11,354 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 [2022-11-23 15:27:11,426 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:27:11,426 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 [2022-11-23 15:27:11,433 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 [2022-11-23 15:27:11,457 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:27:11,458 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 27 treesize of output 22 [2022-11-23 15:27:11,612 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:27:11,612 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 [2022-11-23 15:27:11,616 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 [2022-11-23 15:27:11,643 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-23 15:27:11,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 51 [2022-11-23 15:27:11,661 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 12 treesize of output 8 [2022-11-23 15:27:11,865 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-23 15:27:11,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 69 [2022-11-23 15:27:11,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:11,875 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 14 treesize of output 16 [2022-11-23 15:27:11,904 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 15:27:12,108 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 25 treesize of output 13 [2022-11-23 15:27:12,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-23 15:27:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:12,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:27:12,264 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1384 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1384) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (forall ((v_ArrVal_1384 (Array Int Int)) (v_ArrVal_1383 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1384) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1383) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2022-11-23 15:27:12,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:27:12,447 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 55 treesize of output 59 [2022-11-23 15:27:12,886 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:27:12,887 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-11-23 15:27:13,249 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_subst_1 Int)) (or (not (<= 0 v_subst_1)) (forall ((v_ArrVal_1383 (Array Int Int)) (v_arrayElimArr_20 (Array Int Int))) (let ((.cse0 (select v_arrayElimArr_20 v_subst_1))) (or (not (= (select |c_#valid| .cse0) 0)) (= .cse1 (select (select (store (store |c_#memory_$Pointer$.base| .cse1 v_arrayElimArr_20) .cse0 v_ArrVal_1383) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))))) (forall ((v_prenex_12 (Array Int Int)) (v_prenex_11 (Array Int Int)) (|v_ULTIMATE.start_main_#t~malloc3#1.base_74| Int)) (or (< (select (select (store (store |c_#memory_$Pointer$.offset| .cse1 v_prenex_11) |v_ULTIMATE.start_main_#t~malloc3#1.base_74| v_prenex_12) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 1) (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc3#1.base_74|) 0)))) (forall ((v_ArrVal_1378 (Array Int Int)) (|v_ULTIMATE.start_main_#t~malloc3#1.base_74| Int) (v_ArrVal_1384 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc3#1.base_74|) 0)) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1378) |v_ULTIMATE.start_main_#t~malloc3#1.base_74| v_ArrVal_1384) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) is different from false [2022-11-23 15:27:13,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:27:13,266 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 93 treesize of output 86 [2022-11-23 15:27:13,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:27:13,285 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 77 treesize of output 78 [2022-11-23 15:27:13,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:27:13,297 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 122 treesize of output 125 [2022-11-23 15:27:13,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:27:13,315 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 194 treesize of output 193 [2022-11-23 15:27:13,324 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 177 treesize of output 173 [2022-11-23 15:27:13,331 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 173 treesize of output 169 [2022-11-23 15:27:13,338 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 169 treesize of output 167 [2022-11-23 15:27:13,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:27:13,355 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 167 treesize of output 164 [2022-11-23 15:27:13,363 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 155 treesize of output 151 [2022-11-23 15:27:13,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:27:13,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 198 [2022-11-23 15:27:13,422 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 145 treesize of output 143 [2022-11-23 15:27:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-23 15:27:14,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957941761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:27:14,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615774357] [2022-11-23 15:27:14,042 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-23 15:27:14,042 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:27:14,042 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:27:14,042 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:27:14,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:27:14,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,059 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 [2022-11-23 15:27:14,072 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 [2022-11-23 15:27:14,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,080 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 [2022-11-23 15:27:14,088 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 [2022-11-23 15:27:14,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,103 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 [2022-11-23 15:27:14,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,112 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 [2022-11-23 15:27:14,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,122 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 [2022-11-23 15:27:14,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,150 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 [2022-11-23 15:27:14,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,172 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 [2022-11-23 15:27:14,182 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 [2022-11-23 15:27:14,193 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-23 15:27:14,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,242 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-23 15:27:14,242 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 [2022-11-23 15:27:14,273 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:27:14,273 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 [2022-11-23 15:27:14,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,289 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 [2022-11-23 15:27:14,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,325 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 [2022-11-23 15:27:14,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,339 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 [2022-11-23 15:27:14,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:14,356 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 [2022-11-23 15:27:14,513 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 9 [2022-11-23 15:27:14,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:27:14,534 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 15 treesize of output 1 [2022-11-23 15:27:14,539 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 [2022-11-23 15:27:14,548 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 [2022-11-23 15:27:14,594 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 15 treesize of output 1 [2022-11-23 15:27:14,669 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:27:14,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 172 treesize of output 166 [2022-11-23 15:27:14,752 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-23 15:27:14,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 132 treesize of output 150 [2022-11-23 15:27:15,695 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 [2022-11-23 15:27:15,700 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 [2022-11-23 15:27:15,708 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 [2022-11-23 15:27:15,723 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 [2022-11-23 15:27:15,728 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 [2022-11-23 15:27:15,733 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 [2022-11-23 15:27:15,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:27:15,763 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 9 [2022-11-23 15:27:15,772 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 15 treesize of output 1 [2022-11-23 15:27:15,776 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 [2022-11-23 15:27:15,782 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 [2022-11-23 15:27:15,817 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:27:15,818 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 26 treesize of output 21 [2022-11-23 15:27:15,845 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 15:27:15,846 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 52 treesize of output 43 [2022-11-23 15:27:15,864 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 15 treesize of output 1 [2022-11-23 15:27:15,921 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:15,921 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 72 treesize of output 61 [2022-11-23 15:27:15,953 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:15,953 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 60 treesize of output 57 [2022-11-23 15:27:15,967 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 13 treesize of output 9 [2022-11-23 15:27:16,023 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:16,024 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 72 treesize of output 69 [2022-11-23 15:27:16,054 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:16,055 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 68 treesize of output 57 [2022-11-23 15:27:16,079 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 13 treesize of output 9 [2022-11-23 15:27:16,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:27:16,106 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 9 [2022-11-23 15:27:16,115 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 [2022-11-23 15:27:16,122 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 [2022-11-23 15:27:16,127 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 15 treesize of output 1 [2022-11-23 15:27:16,144 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 15 treesize of output 1 [2022-11-23 15:27:16,173 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 15:27:16,173 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 52 treesize of output 43 [2022-11-23 15:27:16,195 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:27:16,196 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 [2022-11-23 15:27:16,232 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 13 treesize of output 9 [2022-11-23 15:27:16,261 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:16,262 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 72 treesize of output 61 [2022-11-23 15:27:16,295 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:16,296 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 60 treesize of output 57 [2022-11-23 15:27:16,352 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 13 treesize of output 9 [2022-11-23 15:27:16,383 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:16,383 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 72 treesize of output 69 [2022-11-23 15:27:16,415 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-23 15:27:16,415 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 68 treesize of output 57 [2022-11-23 15:27:16,491 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:27:19,220 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13279#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~status~0#1| 2) (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (= |ULTIMATE.start_main_#t~mem7#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem7#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (<= 0 |ULTIMATE.start_main_~item~0#1.offset|) (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0))) (<= |#NULL.offset| 0) (or (not (<= 0 |ULTIMATE.start_main_#t~mem7#1.offset|)) (not (<= (+ |ULTIMATE.start_main_#t~mem7#1.offset| 4) (select |#length| |ULTIMATE.start_main_#t~mem7#1.base|)))) (<= |#NULL.base| 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-23 15:27:19,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:27:19,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:27:19,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 36 [2022-11-23 15:27:19,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230266805] [2022-11-23 15:27:19,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:27:19,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-23 15:27:19,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:27:19,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-23 15:27:19,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2890, Unknown=26, NotChecked=222, Total=3422 [2022-11-23 15:27:19,223 INFO L87 Difference]: Start difference. First operand 258 states and 298 transitions. Second operand has 37 states, 36 states have (on average 3.2222222222222223) internal successors, (116), 37 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:26,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:27:26,699 INFO L93 Difference]: Finished difference Result 291 states and 331 transitions. [2022-11-23 15:27:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:27:26,700 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.2222222222222223) internal successors, (116), 37 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-23 15:27:26,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:27:26,701 INFO L225 Difference]: With dead ends: 291 [2022-11-23 15:27:26,701 INFO L226 Difference]: Without dead ends: 291 [2022-11-23 15:27:26,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1672 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=593, Invalid=4938, Unknown=27, NotChecked=294, Total=5852 [2022-11-23 15:27:26,703 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 592 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:27:26,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1296 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1385 Invalid, 0 Unknown, 267 Unchecked, 1.6s Time] [2022-11-23 15:27:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-23 15:27:26,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 258. [2022-11-23 15:27:26,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 227 states have (on average 1.3083700440528634) internal successors, (297), 257 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 297 transitions. [2022-11-23 15:27:26,710 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 297 transitions. Word has length 39 [2022-11-23 15:27:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:27:26,710 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 297 transitions. [2022-11-23 15:27:26,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.2222222222222223) internal successors, (116), 37 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:27:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 297 transitions. [2022-11-23 15:27:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 15:27:26,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:27:26,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:27:26,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-23 15:27:26,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 15:27:26,918 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-23 15:27:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:27:26,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1978581585, now seen corresponding path program 1 times [2022-11-23 15:27:26,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:27:26,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493634497] [2022-11-23 15:27:26,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:26,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:27:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:27,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:27:27,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493634497] [2022-11-23 15:27:27,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493634497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:27:27,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84633644] [2022-11-23 15:27:27,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:27:27,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:27:27,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:27:27,629 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:27:27,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7dcc3396-5d58-4a0f-afbf-c3ef8c7817fc/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 15:27:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:27:27,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 15:27:27,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:27:27,789 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 [2022-11-23 15:27:27,867 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 15:27:27,867 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 [2022-11-23 15:27:27,911 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 [2022-11-23 15:27:27,923 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 [2022-11-23 15:27:28,021 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 15:27:28,021 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 26 treesize of output 21 [2022-11-23 15:27:28,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:27:28,043 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:27:28,043 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 27 treesize of output 22 [2022-11-23 15:27:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:27:28,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:27:28,125 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:27:28,125 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 1 case distinctions, treesize of input 89 treesize of output 70 [2022-11-23 15:27:28,142 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-23 15:27:28,143 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2022-11-23 15:27:28,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:27:28,690 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 15:27:28,690 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-11-23 15:27:28,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2022-11-23 15:27:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:27:28,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:27:34,247 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:27:34,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 57924 treesize of output 52361 [2022-11-23 15:27:37,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:27:39,896 INFO L321 Elim1Store]: treesize reduction 624, result has 48.3 percent of original size [2022-11-23 15:27:39,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 15 new quantified variables, introduced 92 case distinctions, treesize of input 369067 treesize of output 353860 [2022-11-23 15:28:08,721 WARN L233 SmtUtils]: Spent 28.82s on a formula simplification. DAG size of input: 1419 DAG size of output: 1359 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-23 15:28:10,675 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:28:10,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 410094 treesize of output 355224 [2022-11-23 15:28:13,608 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 6 treesize of output 4 [2022-11-23 15:28:20,029 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:28:20,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:28:20,533 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:28:20,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:28:20,931 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:28:20,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:28:21,201 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-23 15:28:21,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 71 [2022-11-23 15:28:21,793 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:28:21,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:28:29,582 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:28:29,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:28:31,236 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-23 15:28:31,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 81 [2022-11-23 15:28:32,846 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:28:32,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:28:33,441 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-23 15:28:33,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 102 [2022-11-23 15:28:34,152 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:28:34,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 183 treesize of output 203 [2022-11-23 15:28:40,562 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:28:40,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 97 [2022-11-23 15:28:41,489 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:28:41,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:28:43,559 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:28:43,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:28:44,782 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-23 15:28:44,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 81 [2022-11-23 15:29:04,898 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:29:04,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 97 [2022-11-23 15:29:05,887 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:05,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:06,225 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:29:06,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 127 [2022-11-23 15:29:08,531 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:29:08,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 169 treesize of output 171 [2022-11-23 15:29:10,204 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:10,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 117 [2022-11-23 15:29:12,572 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-23 15:29:12,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 139 [2022-11-23 15:29:13,474 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:13,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 117 [2022-11-23 15:29:14,823 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:29:14,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 97 [2022-11-23 15:29:16,130 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:16,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:16,342 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:16,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:16,888 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:16,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:17,274 INFO L321 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-11-23 15:29:17,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 85 treesize of output 73 [2022-11-23 15:29:17,708 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-23 15:29:18,097 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-23 15:29:18,768 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:29:18,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 107 [2022-11-23 15:29:20,848 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:20,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:21,104 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:29:21,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 121 treesize of output 133 [2022-11-23 15:29:24,002 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:24,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:24,275 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-23 15:29:24,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 71 [2022-11-23 15:29:24,860 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:24,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:25,400 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:25,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:25,658 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-23 15:29:25,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 71 [2022-11-23 15:29:26,079 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:29:26,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 144 treesize of output 156 [2022-11-23 15:29:29,763 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:29:29,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 143 treesize of output 155 [2022-11-23 15:29:33,071 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:33,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:33,382 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:33,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:33,947 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-23 15:29:33,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 71 [2022-11-23 15:29:34,858 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:34,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:35,231 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:29:35,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 129 [2022-11-23 15:29:38,004 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:38,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:38,741 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:29:38,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 97 [2022-11-23 15:29:39,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:29:39,714 INFO L321 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-11-23 15:29:39,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:41,033 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:29:41,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 113 [2022-11-23 15:29:42,851 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:42,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:43,442 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-23 15:29:43,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 111 treesize of output 133 [2022-11-23 15:29:47,081 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:47,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:47,366 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-23 15:29:47,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 71 [2022-11-23 15:29:47,966 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:47,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:48,580 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:48,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-23 15:29:49,288 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-23 15:29:49,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 71 [2022-11-23 15:29:50,053 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-23 15:29:50,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59