./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 46bbe683d8965e9a855fbd780578b958a816bbdd25bc1fa0d6151e1b826f8669 --- 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-6b4ec56 [2022-11-20 20:00:03,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:00:03,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:00:03,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:00:03,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:00:03,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:00:03,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:00:03,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:00:03,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:00:03,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:00:03,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:00:03,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:00:03,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:00:03,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:00:03,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:00:03,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:00:03,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:00:03,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:00:03,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:00:03,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:00:03,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:00:03,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:00:03,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:00:03,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:00:03,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:00:03,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:00:03,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:00:03,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:00:03,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:00:03,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:00:03,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:00:03,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:00:03,497 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:00:03,498 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:00:03,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:00:03,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:00:03,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:00:03,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:00:03,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:00:03,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:00:03,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:00:03,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 20:00:03,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:00:03,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:00:03,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:00:03,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:00:03,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:00:03,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:00:03,545 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:00:03,545 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:00:03,545 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:00:03,546 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:00:03,547 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:00:03,547 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:00:03,547 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:00:03,548 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:00:03,548 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:00:03,548 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:00:03,548 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:00:03,549 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:00:03,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 20:00:03,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 20:00:03,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:00:03,550 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:00:03,551 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 20:00:03,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:00:03,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:00:03,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:00:03,552 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 20:00:03,552 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 20:00:03,552 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 20:00:03,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:00:03,553 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:00:03,553 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:00:03,553 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:00:03,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:00:03,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:00:03,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:00:03,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:00:03,555 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:00:03,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:00:03,555 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:00:03,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:00:03,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:00:03,557 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_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46bbe683d8965e9a855fbd780578b958a816bbdd25bc1fa0d6151e1b826f8669 [2022-11-20 20:00:03,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:00:03,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:00:03,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:00:03,931 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:00:03,932 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:00:03,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2022-11-20 20:00:07,131 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:00:07,357 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:00:07,363 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2022-11-20 20:00:07,381 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/data/fa38997e5/e04c0d7b560b439cab1a2735d1b5eebc/FLAGa08d334fc [2022-11-20 20:00:07,396 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/data/fa38997e5/e04c0d7b560b439cab1a2735d1b5eebc [2022-11-20 20:00:07,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:00:07,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:00:07,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:00:07,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:00:07,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:00:07,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:00:07" (1/1) ... [2022-11-20 20:00:07,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f072e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07, skipping insertion in model container [2022-11-20 20:00:07,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:00:07" (1/1) ... [2022-11-20 20:00:07,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:00:07,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:00:07,763 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_bb31d0ef-0caa-4537-b491-4e1d6b098902/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2022-11-20 20:00:07,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:00:07,790 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:00:07,864 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_bb31d0ef-0caa-4537-b491-4e1d6b098902/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2022-11-20 20:00:07,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:00:07,899 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:00:07,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07 WrapperNode [2022-11-20 20:00:07,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:00:07,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:00:07,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:00:07,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:00:07,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07" (1/1) ... [2022-11-20 20:00:07,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07" (1/1) ... [2022-11-20 20:00:07,985 INFO L138 Inliner]: procedures = 127, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 117 [2022-11-20 20:00:07,986 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:00:07,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:00:07,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:00:07,987 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:00:07,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07" (1/1) ... [2022-11-20 20:00:07,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07" (1/1) ... [2022-11-20 20:00:08,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07" (1/1) ... [2022-11-20 20:00:08,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07" (1/1) ... [2022-11-20 20:00:08,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07" (1/1) ... [2022-11-20 20:00:08,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07" (1/1) ... [2022-11-20 20:00:08,044 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07" (1/1) ... [2022-11-20 20:00:08,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07" (1/1) ... [2022-11-20 20:00:08,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:00:08,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:00:08,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:00:08,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:00:08,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07" (1/1) ... [2022-11-20 20:00:08,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:00:08,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:08,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:00:08,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:00:08,133 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-20 20:00:08,133 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-20 20:00:08,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 20:00:08,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 20:00:08,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 20:00:08,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:00:08,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:00:08,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 20:00:08,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 20:00:08,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:00:08,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 20:00:08,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:00:08,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:00:08,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:00:08,358 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:00:08,360 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:00:08,448 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-20 20:00:08,832 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:00:08,881 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:00:08,882 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 20:00:08,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:00:08 BoogieIcfgContainer [2022-11-20 20:00:08,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:00:08,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:00:08,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:00:08,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:00:08,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:00:07" (1/3) ... [2022-11-20 20:00:08,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b165e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:00:08, skipping insertion in model container [2022-11-20 20:00:08,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:00:07" (2/3) ... [2022-11-20 20:00:08,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52b165e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:00:08, skipping insertion in model container [2022-11-20 20:00:08,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:00:08" (3/3) ... [2022-11-20 20:00:08,904 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2022-11-20 20:00:08,927 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:00:08,928 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2022-11-20 20:00:08,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:00:08,991 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;@27db07bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:00:08,991 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-11-20 20:00:08,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 36 states have (on average 2.388888888888889) internal successors, (86), 78 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:00:09,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:09,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:00:09,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:09,009 INFO L85 PathProgramCache]: Analyzing trace with hash 6153029, now seen corresponding path program 1 times [2022-11-20 20:00:09,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:09,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809654276] [2022-11-20 20:00:09,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:09,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:09,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:09,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809654276] [2022-11-20 20:00:09,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809654276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:09,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:09,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:00:09,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211498451] [2022-11-20 20:00:09,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:09,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:00:09,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:09,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:00:09,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:00:09,301 INFO L87 Difference]: Start difference. First operand has 80 states, 36 states have (on average 2.388888888888889) internal successors, (86), 78 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:09,491 INFO L93 Difference]: Finished difference Result 135 states and 148 transitions. [2022-11-20 20:00:09,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:00:09,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 20:00:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:09,502 INFO L225 Difference]: With dead ends: 135 [2022-11-20 20:00:09,503 INFO L226 Difference]: Without dead ends: 129 [2022-11-20 20:00:09,505 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 [2022-11-20 20:00:09,508 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 72 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:09,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 122 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:00:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-20 20:00:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 72. [2022-11-20 20:00:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 34 states have (on average 2.264705882352941) internal successors, (77), 71 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-11-20 20:00:09,549 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 4 [2022-11-20 20:00:09,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:09,549 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-11-20 20:00:09,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:09,550 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-11-20 20:00:09,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:00:09,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:09,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:00:09,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:00:09,551 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:09,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:09,552 INFO L85 PathProgramCache]: Analyzing trace with hash 6153030, now seen corresponding path program 1 times [2022-11-20 20:00:09,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:09,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311686066] [2022-11-20 20:00:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:09,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:09,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:09,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311686066] [2022-11-20 20:00:09,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311686066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:09,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:09,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:00:09,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134928403] [2022-11-20 20:00:09,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:09,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:00:09,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:09,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:00:09,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:00:09,685 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:09,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:09,827 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2022-11-20 20:00:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:00:09,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 20:00:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:09,829 INFO L225 Difference]: With dead ends: 128 [2022-11-20 20:00:09,829 INFO L226 Difference]: Without dead ends: 128 [2022-11-20 20:00:09,829 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 [2022-11-20 20:00:09,831 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 70 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:09,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 117 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:09,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-20 20:00:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2022-11-20 20:00:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 34 states have (on average 2.176470588235294) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2022-11-20 20:00:09,838 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 4 [2022-11-20 20:00:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:09,839 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2022-11-20 20:00:09,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:09,839 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2022-11-20 20:00:09,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:00:09,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:09,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:00:09,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:00:09,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:09,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash 6311657, now seen corresponding path program 1 times [2022-11-20 20:00:09,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:09,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972341720] [2022-11-20 20:00:09,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:09,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:09,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:09,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972341720] [2022-11-20 20:00:09,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972341720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:09,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:09,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:00:09,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705670885] [2022-11-20 20:00:09,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:09,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:00:09,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:09,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:00:09,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:00:09,914 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:09,950 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-11-20 20:00:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:00:09,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 20:00:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:09,952 INFO L225 Difference]: With dead ends: 79 [2022-11-20 20:00:09,953 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 20:00:09,953 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 [2022-11-20 20:00:09,955 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 10 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:09,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:00:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 20:00:09,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-11-20 20:00:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 35 states have (on average 2.142857142857143) internal successors, (75), 69 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-11-20 20:00:09,964 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 4 [2022-11-20 20:00:09,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:09,965 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-11-20 20:00:09,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:09,968 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-11-20 20:00:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:00:09,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:09,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:09,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:00:09,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:09,970 INFO L85 PathProgramCache]: Analyzing trace with hash 209673289, now seen corresponding path program 1 times [2022-11-20 20:00:09,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:09,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473858619] [2022-11-20 20:00:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:09,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:10,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:10,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473858619] [2022-11-20 20:00:10,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473858619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:10,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:10,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:00:10,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579549186] [2022-11-20 20:00:10,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:10,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:00:10,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:10,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:00:10,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:00:10,091 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:10,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:10,141 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2022-11-20 20:00:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:00:10,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 20:00:10,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:10,146 INFO L225 Difference]: With dead ends: 76 [2022-11-20 20:00:10,146 INFO L226 Difference]: Without dead ends: 76 [2022-11-20 20:00:10,147 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 [2022-11-20 20:00:10,156 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:10,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 115 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:00:10,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-20 20:00:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-11-20 20:00:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 40 states have (on average 2.0) internal successors, (80), 74 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) [2022-11-20 20:00:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-11-20 20:00:10,171 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 8 [2022-11-20 20:00:10,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:10,172 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-11-20 20:00:10,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:10,172 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-11-20 20:00:10,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:00:10,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:10,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:10,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:00:10,174 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:10,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1499445486, now seen corresponding path program 1 times [2022-11-20 20:00:10,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:10,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439893774] [2022-11-20 20:00:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:10,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:10,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:10,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439893774] [2022-11-20 20:00:10,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439893774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:10,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109339229] [2022-11-20 20:00:10,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:10,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:10,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:10,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:10,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:00:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:10,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:00:10,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:10,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:10,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109339229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:00:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [54882444] [2022-11-20 20:00:10,609 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-20 20:00:10,609 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:00:10,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:00:10,624 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:00:10,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:00:10,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,746 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 [2022-11-20 20:00:10,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,807 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 22 treesize of output 30 [2022-11-20 20:00:10,875 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 [2022-11-20 20:00:10,888 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 [2022-11-20 20:00:10,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,907 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 28 [2022-11-20 20:00:10,969 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 [2022-11-20 20:00:10,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:10,992 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 41 treesize of output 31 [2022-11-20 20:00:11,012 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 [2022-11-20 20:00:11,063 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 23 treesize of output 22 [2022-11-20 20:00:11,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-20 20:00:11,112 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 23 treesize of output 22 [2022-11-20 20:00:11,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-20 20:00:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,367 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 25 [2022-11-20 20:00:11,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,389 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 25 [2022-11-20 20:00:11,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,416 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 33 treesize of output 38 [2022-11-20 20:00:11,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,465 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 32 treesize of output 34 [2022-11-20 20:00:11,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:00:11,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,525 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 32 treesize of output 34 [2022-11-20 20:00:11,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:11,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:11,698 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 20:00:11,698 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 5 case distinctions, treesize of input 395 treesize of output 376 [2022-11-20 20:00:11,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:11,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:11,751 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-20 20:00:11,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 389 treesize of output 388 [2022-11-20 20:00:11,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:11,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:11,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:11,804 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-20 20:00:11,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 389 treesize of output 388 [2022-11-20 20:00:12,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-20 20:00:12,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,094 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 25 [2022-11-20 20:00:12,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,117 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 25 [2022-11-20 20:00:12,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,148 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 33 treesize of output 38 [2022-11-20 20:00:12,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:00:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,239 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 32 treesize of output 34 [2022-11-20 20:00:12,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-20 20:00:12,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:12,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:12,402 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 20:00:12,403 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 5 case distinctions, treesize of input 395 treesize of output 376 [2022-11-20 20:00:12,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:12,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:12,451 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-20 20:00:12,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 389 treesize of output 388 [2022-11-20 20:00:12,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:12,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:12,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:12,503 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-20 20:00:12,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 389 treesize of output 388 [2022-11-20 20:00:12,891 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-20 20:00:12,892 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 313 treesize of output 320 [2022-11-20 20:00:13,318 INFO L321 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-11-20 20:00:13,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 392 treesize of output 389 [2022-11-20 20:00:13,373 INFO L321 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2022-11-20 20:00:13,374 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 3 case distinctions, treesize of input 396 treesize of output 387 [2022-11-20 20:00:13,418 INFO L321 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2022-11-20 20:00:13,419 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 3 case distinctions, treesize of input 396 treesize of output 387 [2022-11-20 20:00:13,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:00:16,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [54882444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:16,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:00:16,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2022-11-20 20:00:16,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862106010] [2022-11-20 20:00:16,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:16,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:00:16,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:16,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:00:16,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:00:16,897 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:17,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:17,975 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-11-20 20:00:17,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:00:17,976 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:00:17,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:17,977 INFO L225 Difference]: With dead ends: 86 [2022-11-20 20:00:17,977 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 20:00:17,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:00:17,978 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:17,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 109 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:00:17,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 20:00:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2022-11-20 20:00:17,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 47 states have (on average 1.872340425531915) internal successors, (88), 81 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:17,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2022-11-20 20:00:17,983 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 11 [2022-11-20 20:00:17,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:17,983 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2022-11-20 20:00:17,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:17,984 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2022-11-20 20:00:17,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:00:17,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:17,984 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-20 20:00:18,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:18,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:18,196 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:18,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1543488562, now seen corresponding path program 1 times [2022-11-20 20:00:18,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:18,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130180286] [2022-11-20 20:00:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:18,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:18,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:18,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130180286] [2022-11-20 20:00:18,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130180286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:18,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344193483] [2022-11-20 20:00:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:18,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:18,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:18,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:18,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:00:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:18,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:00:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:18,535 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 [2022-11-20 20:00:18,568 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 20:00:18,568 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 [2022-11-20 20:00:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:18,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:18,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344193483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:00:18,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [547282082] [2022-11-20 20:00:18,727 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-20 20:00:18,727 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:00:18,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:00:18,728 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:00:18,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:00:18,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,757 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 [2022-11-20 20:00:18,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,793 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 22 treesize of output 30 [2022-11-20 20:00:18,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,822 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 28 [2022-11-20 20:00:18,839 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 [2022-11-20 20:00:18,853 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 [2022-11-20 20:00:18,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,895 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 41 treesize of output 31 [2022-11-20 20:00:18,912 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 [2022-11-20 20:00:18,922 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 [2022-11-20 20:00:18,955 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 23 treesize of output 22 [2022-11-20 20:00:18,970 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 23 treesize of output 22 [2022-11-20 20:00:18,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,986 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 41 treesize of output 31 [2022-11-20 20:00:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-20 20:00:19,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,098 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 30 treesize of output 21 [2022-11-20 20:00:19,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,113 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 30 treesize of output 21 [2022-11-20 20:00:19,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,136 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 33 treesize of output 38 [2022-11-20 20:00:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,171 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 28 treesize of output 30 [2022-11-20 20:00:19,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,188 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 28 treesize of output 30 [2022-11-20 20:00:19,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:00:19,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:19,326 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 20:00:19,326 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 5 case distinctions, treesize of input 387 treesize of output 368 [2022-11-20 20:00:19,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:19,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:19,365 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-20 20:00:19,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 381 treesize of output 380 [2022-11-20 20:00:19,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:19,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:19,410 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-20 20:00:19,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 381 treesize of output 380 [2022-11-20 20:00:19,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-20 20:00:19,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,641 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 30 treesize of output 21 [2022-11-20 20:00:19,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,659 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 30 treesize of output 21 [2022-11-20 20:00:19,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,687 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 33 treesize of output 38 [2022-11-20 20:00:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:00:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,762 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 28 treesize of output 30 [2022-11-20 20:00:19,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,782 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 28 treesize of output 30 [2022-11-20 20:00:19,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:19,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:19,884 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-20 20:00:19,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 381 treesize of output 380 [2022-11-20 20:00:19,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:19,917 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 20:00:19,920 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 5 case distinctions, treesize of input 387 treesize of output 368 [2022-11-20 20:00:19,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:19,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:19,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:19,955 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-20 20:00:19,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 381 treesize of output 380 [2022-11-20 20:00:20,346 INFO L321 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2022-11-20 20:00:20,347 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 310 treesize of output 317 [2022-11-20 20:00:20,706 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-11-20 20:00:20,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 392 treesize of output 389 [2022-11-20 20:00:20,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:00:20,731 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 1 case distinctions, treesize of input 396 treesize of output 387 [2022-11-20 20:00:20,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:00:20,752 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 1 case distinctions, treesize of input 396 treesize of output 387 [2022-11-20 20:00:20,823 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:00:24,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [547282082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:24,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:00:24,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 3, 4] total 13 [2022-11-20 20:00:24,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336980614] [2022-11-20 20:00:24,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:24,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:00:24,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:24,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:00:24,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:00:24,612 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:25,893 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-11-20 20:00:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 20:00:25,893 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 20:00:25,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:25,894 INFO L225 Difference]: With dead ends: 84 [2022-11-20 20:00:25,894 INFO L226 Difference]: Without dead ends: 84 [2022-11-20 20:00:25,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:00:25,895 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:25,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 119 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:00:25,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-20 20:00:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-11-20 20:00:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.8541666666666667) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2022-11-20 20:00:25,900 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 15 [2022-11-20 20:00:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:25,901 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2022-11-20 20:00:25,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2022-11-20 20:00:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 20:00:25,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:25,902 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:25,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:26,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:26,108 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:26,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:26,109 INFO L85 PathProgramCache]: Analyzing trace with hash -288796838, now seen corresponding path program 1 times [2022-11-20 20:00:26,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:26,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813097108] [2022-11-20 20:00:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:26,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:00:26,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:26,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813097108] [2022-11-20 20:00:26,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813097108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:26,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:26,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:00:26,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798050696] [2022-11-20 20:00:26,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:26,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:00:26,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:26,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:00:26,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:00:26,248 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:26,318 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-11-20 20:00:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:00:26,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 20:00:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:26,319 INFO L225 Difference]: With dead ends: 90 [2022-11-20 20:00:26,320 INFO L226 Difference]: Without dead ends: 90 [2022-11-20 20:00:26,320 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 [2022-11-20 20:00:26,320 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:26,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 47 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-20 20:00:26,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2022-11-20 20:00:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 79 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-11-20 20:00:26,326 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 19 [2022-11-20 20:00:26,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:26,326 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-11-20 20:00:26,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:26,327 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-11-20 20:00:26,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 20:00:26,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:26,328 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:26,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 20:00:26,328 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:26,329 INFO L85 PathProgramCache]: Analyzing trace with hash -288796837, now seen corresponding path program 1 times [2022-11-20 20:00:26,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:26,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274619474] [2022-11-20 20:00:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:26,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:26,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:00:26,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:26,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274619474] [2022-11-20 20:00:26,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274619474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:26,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:26,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:00:26,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784968067] [2022-11-20 20:00:26,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:26,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:00:26,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:26,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:00:26,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:00:26,481 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:26,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:26,541 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2022-11-20 20:00:26,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:00:26,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 20:00:26,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:26,542 INFO L225 Difference]: With dead ends: 77 [2022-11-20 20:00:26,542 INFO L226 Difference]: Without dead ends: 77 [2022-11-20 20:00:26,542 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 [2022-11-20 20:00:26,543 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 54 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:26,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 43 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:26,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-20 20:00:26,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-20 20:00:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2022-11-20 20:00:26,548 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 19 [2022-11-20 20:00:26,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:26,549 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2022-11-20 20:00:26,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2022-11-20 20:00:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 20:00:26,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:26,550 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:26,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:00:26,550 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:26,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:26,551 INFO L85 PathProgramCache]: Analyzing trace with hash -727074723, now seen corresponding path program 1 times [2022-11-20 20:00:26,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:26,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86472105] [2022-11-20 20:00:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:26,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:00:26,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:26,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86472105] [2022-11-20 20:00:26,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86472105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:26,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931059963] [2022-11-20 20:00:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:26,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:26,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:26,921 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:26,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:00:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:00:27,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:27,065 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 [2022-11-20 20:00:27,083 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 20:00:27,084 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-20 20:00:27,174 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 20:00:27,174 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 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 20:00:27,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:27,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 20:00:27,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:00:27,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:00:27,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931059963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:00:27,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087057844] [2022-11-20 20:00:27,762 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-20 20:00:27,762 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:00:27,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:00:27,763 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:00:27,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:00:27,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:27,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:27,796 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 [2022-11-20 20:00:27,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:27,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:27,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:27,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:27,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:27,825 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 22 treesize of output 30 [2022-11-20 20:00:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:27,853 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 28 [2022-11-20 20:00:27,865 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 [2022-11-20 20:00:27,874 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 15 treesize of output 1 [2022-11-20 20:00:27,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:27,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:27,899 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 41 treesize of output 31 [2022-11-20 20:00:27,909 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 13 treesize of output 9 [2022-11-20 20:00:27,920 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 13 treesize of output 9 [2022-11-20 20:00:27,944 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 23 treesize of output 22 [2022-11-20 20:00:27,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:27,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:27,961 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 41 treesize of output 31 [2022-11-20 20:00:27,975 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 23 treesize of output 22 [2022-11-20 20:00:28,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-20 20:00:28,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,091 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 30 treesize of output 21 [2022-11-20 20:00:28,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,111 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 30 treesize of output 21 [2022-11-20 20:00:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,130 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 33 treesize of output 38 [2022-11-20 20:00:28,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,166 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 28 treesize of output 30 [2022-11-20 20:00:28,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:00:28,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,203 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 28 treesize of output 30 [2022-11-20 20:00:28,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,242 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 [2022-11-20 20:00:28,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:00:28,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,285 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 [2022-11-20 20:00:28,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:00:28,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:28,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2022-11-20 20:00:28,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:28,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2022-11-20 20:00:28,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-11-20 20:00:28,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,765 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 33 treesize of output 38 [2022-11-20 20:00:28,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,780 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 25 [2022-11-20 20:00:28,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,802 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 25 [2022-11-20 20:00:28,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:00:28,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,860 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 32 treesize of output 34 [2022-11-20 20:00:28,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,878 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 32 treesize of output 34 [2022-11-20 20:00:28,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:00:28,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,968 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 41 treesize of output 46 [2022-11-20 20:00:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,988 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 41 treesize of output 46 [2022-11-20 20:00:29,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2022-11-20 20:00:29,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:00:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2022-11-20 20:00:29,367 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 [2022-11-20 20:00:29,386 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 [2022-11-20 20:00:29,456 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 19 treesize of output 1 [2022-11-20 20:00:29,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 20:00:29,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 20:00:29,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:00:29,537 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 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-20 20:00:29,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:00:29,561 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 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-20 20:00:29,581 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 19 treesize of output 1 [2022-11-20 20:00:29,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:29,643 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-20 20:00:29,644 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 3 case distinctions, treesize of input 41 treesize of output 39 [2022-11-20 20:00:29,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:29,686 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-20 20:00:29,686 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 3 case distinctions, treesize of input 41 treesize of output 39 [2022-11-20 20:00:29,708 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 [2022-11-20 20:00:29,749 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 [2022-11-20 20:00:29,756 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 [2022-11-20 20:00:29,781 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 [2022-11-20 20:00:29,789 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 [2022-11-20 20:00:29,796 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 [2022-11-20 20:00:29,856 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 13 treesize of output 9 [2022-11-20 20:00:29,864 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 [2022-11-20 20:00:29,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:29,896 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:00:29,896 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 230 treesize of output 216 [2022-11-20 20:00:29,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:30,004 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:00:30,005 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 230 treesize of output 216 [2022-11-20 20:00:30,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 20:00:30,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 20:00:30,116 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:00:34,113 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1778#(and (<= 1 |ULTIMATE.start_dll_create_~data#1|) (= |ULTIMATE.start_node_create_~data#1| |ULTIMATE.start_node_create_#in~data#1|) (= (select (select |#memory_int| |ULTIMATE.start_node_create_~temp~0#1.base|) |ULTIMATE.start_node_create_~temp~0#1.offset|) |ULTIMATE.start_node_create_~data#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (= |ULTIMATE.start_dll_create_~head~0#1.offset| |ULTIMATE.start_dll_create_#res#1.offset|) (= (select |#valid| |ULTIMATE.start_node_create_~temp~0#1.base|) 1) (= |ULTIMATE.start_dll_prepend_#in~head#1.offset| |ULTIMATE.start_dll_prepend_~head#1.offset|) (= |ULTIMATE.start_dll_prepend_~new_head~1#1.offset| |ULTIMATE.start_node_create_#res#1.offset|) (= |ULTIMATE.start_main_~data~0#1| |ULTIMATE.start_dll_prepend_#in~data#1|) (= |ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= |ULTIMATE.start_node_create_~temp~0#1.offset| |ULTIMATE.start_node_create_#res#1.offset|) (= |ULTIMATE.start_dll_prepend_#in~head#1.base| |ULTIMATE.start_dll_prepend_~head#1.base|) (= 12 (select |#length| |ULTIMATE.start_node_create_~temp~0#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_node_create_~temp~0#1.base|) (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_node_create_~temp~0#1.base|) (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 8)) 0) (= |ULTIMATE.start_dll_prepend_#in~data#1| |ULTIMATE.start_dll_prepend_~data#1|) (<= |ULTIMATE.start_dll_create_~data#1| 1) (= |ULTIMATE.start_dll_create_#res#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= |ULTIMATE.start_dll_create_~head~0#1.base| |ULTIMATE.start_dll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_dll_create_#res#1.offset|) (= |ULTIMATE.start_node_create_#in~data#1| |ULTIMATE.start_dll_prepend_~data#1|) (= |ULTIMATE.start_node_create_#res#1.base| |ULTIMATE.start_node_create_~temp~0#1.base|) (= |ULTIMATE.start_dll_prepend_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_dll_create_~len#1|) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_create_~len#1| 0) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_node_create_~temp~0#1.base|) (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 4)) 0) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (< |ULTIMATE.start_node_create_~temp~0#1.base| |#StackHeapBarrier|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_node_create_~temp~0#1.base|) (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 8)) 0) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_prepend_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#StackHeapBarrier|) (not (= (select |#valid| |ULTIMATE.start_dll_prepend_~head#1.base|) 1)) (= |ULTIMATE.start_dll_prepend_~new_head~1#1.base| |ULTIMATE.start_node_create_#res#1.base|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (not (= |ULTIMATE.start_node_create_~temp~0#1.base| 0)) (= |#NULL.base| 0))' at error location [2022-11-20 20:00:34,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:00:34,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:00:34,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-11-20 20:00:34,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501565903] [2022-11-20 20:00:34,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:00:34,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 20:00:34,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:34,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 20:00:34,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:00:34,115 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:34,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:34,237 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2022-11-20 20:00:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:00:34,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 20:00:34,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:34,238 INFO L225 Difference]: With dead ends: 81 [2022-11-20 20:00:34,238 INFO L226 Difference]: Without dead ends: 81 [2022-11-20 20:00:34,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-11-20 20:00:34,239 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 156 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:34,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 95 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 69 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2022-11-20 20:00:34,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-20 20:00:34,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2022-11-20 20:00:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:34,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-11-20 20:00:34,243 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 22 [2022-11-20 20:00:34,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:34,243 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-11-20 20:00:34,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-11-20 20:00:34,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 20:00:34,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:34,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:34,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:34,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:34,445 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash -727074722, now seen corresponding path program 1 times [2022-11-20 20:00:34,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:34,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572988281] [2022-11-20 20:00:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:34,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:35,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:35,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572988281] [2022-11-20 20:00:35,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572988281] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:35,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264401134] [2022-11-20 20:00:35,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:35,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:35,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:35,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:35,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:00:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:35,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:00:35,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:35,214 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 [2022-11-20 20:00:35,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:35,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 20:00:35,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:35,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 20:00:35,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:35,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 20:00:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:00:35,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:00:35,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264401134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:35,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:00:35,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-11-20 20:00:35,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968097479] [2022-11-20 20:00:35,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:35,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:00:35,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:35,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:00:35,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:00:35,393 INFO L87 Difference]: Start difference. First operand 71 states and 77 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) [2022-11-20 20:00:35,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:35,466 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-11-20 20:00:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:00:35,467 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 22 [2022-11-20 20:00:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:35,468 INFO L225 Difference]: With dead ends: 65 [2022-11-20 20:00:35,468 INFO L226 Difference]: Without dead ends: 65 [2022-11-20 20:00:35,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:00:35,469 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 82 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:35,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 31 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:35,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-20 20:00:35,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-20 20:00:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-11-20 20:00:35,476 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 22 [2022-11-20 20:00:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:35,476 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-11-20 20:00:35,477 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) [2022-11-20 20:00:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-11-20 20:00:35,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 20:00:35,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:35,478 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-20 20:00:35,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 20:00:35,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 20:00:35,680 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:35,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:35,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1532969926, now seen corresponding path program 1 times [2022-11-20 20:00:35,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:35,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847386045] [2022-11-20 20:00:35,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:35,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:35,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:35,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847386045] [2022-11-20 20:00:35,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847386045] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:35,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895756357] [2022-11-20 20:00:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:35,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:35,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:35,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:35,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:00:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:35,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:00:35,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:35,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:00:35,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895756357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:35,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:00:35,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-20 20:00:35,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500232984] [2022-11-20 20:00:35,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:35,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:00:35,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:35,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:00:35,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:00:35,977 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:36,006 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-11-20 20:00:36,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:00:36,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 20:00:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:36,009 INFO L225 Difference]: With dead ends: 59 [2022-11-20 20:00:36,009 INFO L226 Difference]: Without dead ends: 57 [2022-11-20 20:00:36,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:00:36,010 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 91 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:36,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 62 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:00:36,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-20 20:00:36,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-20 20:00:36,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-11-20 20:00:36,027 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 23 [2022-11-20 20:00:36,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:36,032 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-11-20 20:00:36,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-11-20 20:00:36,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 20:00:36,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:36,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:36,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:36,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:36,239 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:36,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:36,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1064479892, now seen corresponding path program 1 times [2022-11-20 20:00:36,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:36,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745102136] [2022-11-20 20:00:36,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:36,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:00:36,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:36,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745102136] [2022-11-20 20:00:36,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745102136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:36,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:36,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:00:36,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375590301] [2022-11-20 20:00:36,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:36,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:00:36,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:36,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:00:36,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:00:36,330 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) 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) [2022-11-20 20:00:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:36,398 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-11-20 20:00:36,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:00:36,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) 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 23 [2022-11-20 20:00:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:36,399 INFO L225 Difference]: With dead ends: 66 [2022-11-20 20:00:36,399 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 20:00:36,399 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 [2022-11-20 20:00:36,400 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:36,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 47 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 20:00:36,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2022-11-20 20:00:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 55 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) [2022-11-20 20:00:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-11-20 20:00:36,403 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 23 [2022-11-20 20:00:36,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:36,403 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-11-20 20:00:36,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) 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) [2022-11-20 20:00:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-11-20 20:00:36,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 20:00:36,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:36,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:36,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 20:00:36,405 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:36,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1064479891, now seen corresponding path program 1 times [2022-11-20 20:00:36,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:36,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175232244] [2022-11-20 20:00:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:36,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:00:36,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:36,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175232244] [2022-11-20 20:00:36,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175232244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:36,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:36,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:00:36,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720732668] [2022-11-20 20:00:36,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:36,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:00:36,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:36,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:00:36,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:00:36,574 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2022-11-20 20:00:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:36,632 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-11-20 20:00:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:00:36,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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 23 [2022-11-20 20:00:36,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:36,633 INFO L225 Difference]: With dead ends: 55 [2022-11-20 20:00:36,634 INFO L226 Difference]: Without dead ends: 55 [2022-11-20 20:00:36,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:00:36,634 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 115 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:36,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 42 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:00:36,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-20 20:00:36,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-20 20:00:36,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 42 states have (on average 1.380952380952381) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:36,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-11-20 20:00:36,637 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 23 [2022-11-20 20:00:36,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:36,638 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-11-20 20:00:36,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2022-11-20 20:00:36,638 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-11-20 20:00:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 20:00:36,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:36,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:36,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 20:00:36,639 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:36,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:36,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1329740313, now seen corresponding path program 1 times [2022-11-20 20:00:36,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:36,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096501335] [2022-11-20 20:00:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:36,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:00:37,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:37,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096501335] [2022-11-20 20:00:37,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096501335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:37,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:37,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:00:37,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167343101] [2022-11-20 20:00:37,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:37,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:00:37,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:37,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:00:37,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:37,049 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:37,336 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2022-11-20 20:00:37,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:00:37,337 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 20:00:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:37,337 INFO L225 Difference]: With dead ends: 65 [2022-11-20 20:00:37,337 INFO L226 Difference]: Without dead ends: 65 [2022-11-20 20:00:37,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:00:37,338 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 177 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:37,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 71 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:00:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-20 20:00:37,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2022-11-20 20:00:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-11-20 20:00:37,340 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 27 [2022-11-20 20:00:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:37,341 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-11-20 20:00:37,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-11-20 20:00:37,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 20:00:37,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:37,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:37,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 20:00:37,342 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:37,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:37,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1329740314, now seen corresponding path program 1 times [2022-11-20 20:00:37,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:37,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648281811] [2022-11-20 20:00:37,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:37,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:00:38,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:38,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648281811] [2022-11-20 20:00:38,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648281811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:38,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:38,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:00:38,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109602045] [2022-11-20 20:00:38,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:38,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:00:38,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:38,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:00:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:38,005 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:38,208 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-11-20 20:00:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:00:38,208 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 20:00:38,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:38,209 INFO L225 Difference]: With dead ends: 54 [2022-11-20 20:00:38,209 INFO L226 Difference]: Without dead ends: 54 [2022-11-20 20:00:38,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:00:38,210 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 138 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:38,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 53 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:38,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-20 20:00:38,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-11-20 20:00:38,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:38,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-11-20 20:00:38,212 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 27 [2022-11-20 20:00:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:38,212 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-11-20 20:00:38,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-11-20 20:00:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 20:00:38,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:38,213 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:38,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 20:00:38,213 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:38,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:38,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2008737315, now seen corresponding path program 1 times [2022-11-20 20:00:38,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:38,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117353091] [2022-11-20 20:00:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:38,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:00:38,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:38,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117353091] [2022-11-20 20:00:38,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117353091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:38,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:38,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:00:38,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119453828] [2022-11-20 20:00:38,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:38,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:00:38,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:38,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:00:38,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:00:38,433 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:38,550 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-11-20 20:00:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:00:38,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 20:00:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:38,551 INFO L225 Difference]: With dead ends: 79 [2022-11-20 20:00:38,551 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 20:00:38,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:00:38,552 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 163 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:38,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 72 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 20:00:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2022-11-20 20:00:38,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 53 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) [2022-11-20 20:00:38,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2022-11-20 20:00:38,555 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 29 [2022-11-20 20:00:38,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:38,555 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2022-11-20 20:00:38,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2022-11-20 20:00:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 20:00:38,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:38,557 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:38,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 20:00:38,557 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:38,558 INFO L85 PathProgramCache]: Analyzing trace with hash -2008737314, now seen corresponding path program 1 times [2022-11-20 20:00:38,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:38,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562002964] [2022-11-20 20:00:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:38,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:00:38,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:38,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562002964] [2022-11-20 20:00:38,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562002964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:38,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:38,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:00:38,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612183316] [2022-11-20 20:00:38,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:38,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:00:38,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:38,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:00:38,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:00:38,984 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:39,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:39,135 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2022-11-20 20:00:39,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:00:39,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 20:00:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:39,136 INFO L225 Difference]: With dead ends: 72 [2022-11-20 20:00:39,136 INFO L226 Difference]: Without dead ends: 72 [2022-11-20 20:00:39,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:39,137 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 165 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:39,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 62 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-20 20:00:39,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2022-11-20 20:00:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 54 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) [2022-11-20 20:00:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-11-20 20:00:39,139 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 29 [2022-11-20 20:00:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:39,140 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-11-20 20:00:39,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:39,140 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-11-20 20:00:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 20:00:39,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:39,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:39,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 20:00:39,141 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:39,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:39,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2141241893, now seen corresponding path program 1 times [2022-11-20 20:00:39,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:39,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203221463] [2022-11-20 20:00:39,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:39,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:00:39,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:39,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203221463] [2022-11-20 20:00:39,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203221463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:39,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:39,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:00:39,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831297474] [2022-11-20 20:00:39,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:39,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:00:39,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:39,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:00:39,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:00:39,358 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:39,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:39,465 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-11-20 20:00:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:00:39,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 20:00:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:39,466 INFO L225 Difference]: With dead ends: 58 [2022-11-20 20:00:39,466 INFO L226 Difference]: Without dead ends: 58 [2022-11-20 20:00:39,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:39,467 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 108 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:39,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 82 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-20 20:00:39,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-11-20 20:00:39,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.288888888888889) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-11-20 20:00:39,469 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 30 [2022-11-20 20:00:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:39,469 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-11-20 20:00:39,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:39,470 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-11-20 20:00:39,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 20:00:39,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:39,472 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:39,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 20:00:39,472 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:39,473 INFO L85 PathProgramCache]: Analyzing trace with hash -512026756, now seen corresponding path program 1 times [2022-11-20 20:00:39,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:39,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626828424] [2022-11-20 20:00:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:39,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:00:39,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:39,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626828424] [2022-11-20 20:00:39,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626828424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:39,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:39,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:00:39,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989007778] [2022-11-20 20:00:39,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:39,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:00:39,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:39,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:00:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:39,931 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:40,167 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-11-20 20:00:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:00:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2022-11-20 20:00:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:40,169 INFO L225 Difference]: With dead ends: 55 [2022-11-20 20:00:40,169 INFO L226 Difference]: Without dead ends: 55 [2022-11-20 20:00:40,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:00:40,170 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:40,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 59 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:40,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-20 20:00:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-20 20:00:40,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:40,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-11-20 20:00:40,172 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 32 [2022-11-20 20:00:40,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:40,173 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-11-20 20:00:40,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:40,173 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-11-20 20:00:40,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 20:00:40,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:40,174 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:40,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 20:00:40,174 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:40,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:40,174 INFO L85 PathProgramCache]: Analyzing trace with hash -211100282, now seen corresponding path program 1 times [2022-11-20 20:00:40,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:40,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844247322] [2022-11-20 20:00:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:40,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:00:41,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:41,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844247322] [2022-11-20 20:00:41,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844247322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:41,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:41,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 20:00:41,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122639499] [2022-11-20 20:00:41,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:41,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:00:41,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:41,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:00:41,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:00:41,291 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:41,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:41,940 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-11-20 20:00:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:00:41,941 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2022-11-20 20:00:41,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:41,941 INFO L225 Difference]: With dead ends: 66 [2022-11-20 20:00:41,941 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 20:00:41,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-11-20 20:00:41,942 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 222 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:41,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 82 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:00:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 20:00:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2022-11-20 20:00:41,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-11-20 20:00:41,945 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 34 [2022-11-20 20:00:41,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:41,945 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-11-20 20:00:41,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:00:41,945 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-11-20 20:00:41,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 20:00:41,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:41,946 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-11-20 20:00:41,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 20:00:41,946 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:00:41,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:41,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2045826363, now seen corresponding path program 1 times [2022-11-20 20:00:41,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:41,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806352872] [2022-11-20 20:00:41,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:41,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:00:43,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:43,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806352872] [2022-11-20 20:00:43,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806352872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:43,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540641848] [2022-11-20 20:00:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:43,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:43,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:43,244 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:43,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:00:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:43,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-20 20:00:43,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:43,561 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 [2022-11-20 20:00:43,682 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 20:00:43,683 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 15 treesize of output 15 [2022-11-20 20:00:43,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,747 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 15 treesize of output 17 [2022-11-20 20:00:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,770 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 15 treesize of output 17 [2022-11-20 20:00:43,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,790 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 15 treesize of output 17 [2022-11-20 20:00:43,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:43,907 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-20 20:00:44,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,135 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 20:00:44,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 49 [2022-11-20 20:00:44,147 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-11-20 20:00:44,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,236 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 0 case distinctions, treesize of input 55 treesize of output 38 [2022-11-20 20:00:44,250 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 [2022-11-20 20:00:44,301 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 [2022-11-20 20:00:44,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:44,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:44,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:00:44,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 24 [2022-11-20 20:00:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:00:44,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:44,510 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 114 treesize of output 106 [2022-11-20 20:00:54,800 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:00:54,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:00:54,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 220 [2022-11-20 20:01:07,430 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 6074 treesize of output 5416 [2022-11-20 20:01:07,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:07,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 5536 treesize of output 4876 [2022-11-20 20:01:07,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:07,752 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 5458 treesize of output 5220 [2022-11-20 20:01:07,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:07,873 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 7242 treesize of output 6506 [2022-11-20 20:01:19,094 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 10 treesize of output 8 [2022-11-20 20:01:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:01:19,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540641848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:19,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1893945779] [2022-11-20 20:01:19,149 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-20 20:01:19,149 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:19,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:19,150 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:19,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:19,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,174 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 [2022-11-20 20:01:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,197 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 22 treesize of output 30 [2022-11-20 20:01:19,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,234 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 28 [2022-11-20 20:01:19,245 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 [2022-11-20 20:01:19,255 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 [2022-11-20 20:01:19,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,275 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 41 treesize of output 31 [2022-11-20 20:01:19,287 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 [2022-11-20 20:01:19,296 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 [2022-11-20 20:01:19,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,323 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 41 treesize of output 31 [2022-11-20 20:01:19,335 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 23 treesize of output 22 [2022-11-20 20:01:19,347 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 23 treesize of output 22 [2022-11-20 20:01:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-20 20:01:19,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,476 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 30 treesize of output 21 [2022-11-20 20:01:19,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,493 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 33 treesize of output 38 [2022-11-20 20:01:19,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,514 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 30 treesize of output 21 [2022-11-20 20:01:19,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,547 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 28 treesize of output 30 [2022-11-20 20:01:19,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:01:19,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,590 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 28 treesize of output 30 [2022-11-20 20:01:19,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,629 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 [2022-11-20 20:01:19,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:01:19,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,668 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 [2022-11-20 20:01:19,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:19,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2022-11-20 20:01:19,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:19,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2022-11-20 20:01:19,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:19,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:01:20,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,073 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-20 20:01:20,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 34 treesize of output 51 [2022-11-20 20:01:20,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,136 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 25 [2022-11-20 20:01:20,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,151 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 25 [2022-11-20 20:01:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,172 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 33 treesize of output 38 [2022-11-20 20:01:20,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:01:20,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,248 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 32 treesize of output 34 [2022-11-20 20:01:20,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,265 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 32 treesize of output 34 [2022-11-20 20:01:20,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,303 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 41 treesize of output 46 [2022-11-20 20:01:20,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,321 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 41 treesize of output 46 [2022-11-20 20:01:20,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:01:20,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2022-11-20 20:01:20,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-20 20:01:20,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2022-11-20 20:01:20,527 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 [2022-11-20 20:01:20,534 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 [2022-11-20 20:01:20,553 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 [2022-11-20 20:01:20,559 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 [2022-11-20 20:01:20,565 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 [2022-11-20 20:01:20,581 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 [2022-11-20 20:01:20,588 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 [2022-11-20 20:01:20,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,600 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 [2022-11-20 20:01:20,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,618 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 [2022-11-20 20:01:20,626 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 23 treesize of output 22 [2022-11-20 20:01:20,635 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 23 treesize of output 22 [2022-11-20 20:01:20,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:20,680 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 20:01:20,681 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 32 treesize of output 38 [2022-11-20 20:01:20,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,694 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 27 treesize of output 11 [2022-11-20 20:01:20,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:20,715 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-20 20:01:20,715 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 32 treesize of output 34 [2022-11-20 20:01:20,787 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 [2022-11-20 20:01:20,794 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 [2022-11-20 20:01:20,811 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 [2022-11-20 20:01:20,819 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 [2022-11-20 20:01:20,827 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 [2022-11-20 20:01:20,841 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 [2022-11-20 20:01:20,849 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 [2022-11-20 20:01:20,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,858 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 [2022-11-20 20:01:20,875 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 23 treesize of output 22 [2022-11-20 20:01:20,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,886 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 [2022-11-20 20:01:20,896 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 23 treesize of output 22 [2022-11-20 20:01:20,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:20,935 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-20 20:01:20,935 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 32 treesize of output 34 [2022-11-20 20:01:20,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:20,959 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 20:01:20,959 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 32 treesize of output 38 [2022-11-20 20:01:20,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:20,973 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 27 treesize of output 11 [2022-11-20 20:01:21,089 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 [2022-11-20 20:01:21,106 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 [2022-11-20 20:01:21,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 20:01:21,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 20:01:21,186 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 19 treesize of output 1 [2022-11-20 20:01:21,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:21,218 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 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-20 20:01:21,233 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 19 treesize of output 1 [2022-11-20 20:01:21,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:21,261 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 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-20 20:01:21,301 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 [2022-11-20 20:01:21,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:21,330 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-20 20:01:21,331 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 3 case distinctions, treesize of input 41 treesize of output 39 [2022-11-20 20:01:21,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:21,371 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-20 20:01:21,371 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 3 case distinctions, treesize of input 41 treesize of output 39 [2022-11-20 20:01:21,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:21,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:21,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 39 [2022-11-20 20:01:21,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,489 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 [2022-11-20 20:01:21,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:21,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:21,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 39 [2022-11-20 20:01:21,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,701 INFO L321 Elim1Store]: treesize reduction 96, result has 28.4 percent of original size [2022-11-20 20:01:21,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 166 treesize of output 140 [2022-11-20 20:01:21,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,805 INFO L321 Elim1Store]: treesize reduction 82, result has 38.8 percent of original size [2022-11-20 20:01:21,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 181 treesize of output 175 [2022-11-20 20:01:21,863 INFO L321 Elim1Store]: treesize reduction 33, result has 38.9 percent of original size [2022-11-20 20:01:21,863 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 39 treesize of output 25 [2022-11-20 20:01:21,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:21,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:22,043 INFO L321 Elim1Store]: treesize reduction 120, result has 21.6 percent of original size [2022-11-20 20:01:22,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 333 treesize of output 280 [2022-11-20 20:01:22,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:22,102 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-20 20:01:22,103 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 320 treesize of output 308 [2022-11-20 20:01:22,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:22,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:22,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:22,190 INFO L321 Elim1Store]: treesize reduction 124, result has 32.2 percent of original size [2022-11-20 20:01:22,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 317 treesize of output 314 [2022-11-20 20:01:22,694 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 20:01:22,699 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 20:01:27,809 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 20:01:27,813 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 20:01:34,395 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 20:01:34,398 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 20:01:35,706 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 20:01:35,708 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-20 20:01:37,394 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 [2022-11-20 20:01:37,403 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 [2022-11-20 20:01:37,426 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 [2022-11-20 20:01:37,433 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 [2022-11-20 20:01:37,440 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 [2022-11-20 20:01:37,456 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 [2022-11-20 20:01:37,462 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 [2022-11-20 20:01:37,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:37,473 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 [2022-11-20 20:01:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:37,489 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 [2022-11-20 20:01:37,501 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 23 treesize of output 22 [2022-11-20 20:01:37,512 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 23 treesize of output 22 [2022-11-20 20:01:37,572 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:01:47,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3773#(and (<= |ULTIMATE.start_dll_prepend_~data#1| 1) (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 1 |ULTIMATE.start_dll_create_~data#1|) (<= |ULTIMATE.start_dll_prepend_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_node_create_~data#1|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 1 |ULTIMATE.start_dll_prepend_#in~data#1|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (<= |ULTIMATE.start_dll_prepend_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_dll_prepend_~head#1.offset|) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (<= 0 |ULTIMATE.start_dll_prepend_#in~head#1.base|) (<= |ULTIMATE.start_dll_prepend_~head#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~ptr~0#1.base|) 1)) (<= 0 |ULTIMATE.start_node_create_#res#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_prepend_#in~head#1.offset|) (<= |ULTIMATE.start_dll_create_~data#1| 1) (<= 0 |ULTIMATE.start_dll_prepend_~head#1.base|) (<= 0 |ULTIMATE.start_dll_prepend_~new_head~1#1.offset|) (<= 1 |ULTIMATE.start_node_create_#in~data#1|) (<= |ULTIMATE.start_node_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_prepend_~new_head~1#1.offset| 0) (<= 0 (+ |ULTIMATE.start_dll_create_~len#1| 1)) (<= |ULTIMATE.start_node_create_#in~data#1| 1) (<= 0 |ULTIMATE.start_node_create_~temp~0#1.offset|) (<= |#NULL.base| 0) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (<= 1 |ULTIMATE.start_dll_prepend_~data#1|) (<= |ULTIMATE.start_dll_create_~len#1| 0) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_node_create_~temp~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= |ULTIMATE.start_node_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_create_#res#1.offset|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|))' at error location [2022-11-20 20:01:47,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:01:47,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:01:47,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2022-11-20 20:01:47,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333058734] [2022-11-20 20:01:47,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:01:47,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 20:01:47,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:47,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 20:01:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3529, Unknown=11, NotChecked=0, Total=3782 [2022-11-20 20:01:47,914 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 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) [2022-11-20 20:01:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:48,989 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2022-11-20 20:01:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:01:48,989 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 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 35 [2022-11-20 20:01:48,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:48,990 INFO L225 Difference]: With dead ends: 75 [2022-11-20 20:01:48,990 INFO L226 Difference]: Without dead ends: 75 [2022-11-20 20:01:48,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1573 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=425, Invalid=4820, Unknown=11, NotChecked=0, Total=5256 [2022-11-20 20:01:48,992 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 121 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:48,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 296 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 552 Invalid, 0 Unknown, 245 Unchecked, 0.4s Time] [2022-11-20 20:01:48,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-20 20:01:48,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2022-11-20 20:01:48,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:01:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-11-20 20:01:48,995 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 35 [2022-11-20 20:01:48,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:48,995 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-11-20 20:01:48,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 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) [2022-11-20 20:01:48,996 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-11-20 20:01:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 20:01:48,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:48,996 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-11-20 20:01:49,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:49,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 20:01:49,203 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-20 20:01:49,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:49,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2045826364, now seen corresponding path program 1 times [2022-11-20 20:01:49,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:49,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859276208] [2022-11-20 20:01:49,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:49,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:01:51,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:51,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859276208] [2022-11-20 20:01:51,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859276208] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:01:51,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605182702] [2022-11-20 20:01:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:51,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:51,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:51,464 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:51,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb31d0ef-0caa-4537-b491-4e1d6b098902/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:01:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:51,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-20 20:01:51,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:51,761 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 [2022-11-20 20:01:51,942 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 20:01:51,943 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 15 treesize of output 15 [2022-11-20 20:01:52,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,031 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 15 treesize of output 17 [2022-11-20 20:01:52,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,040 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 14 treesize of output 16 [2022-11-20 20:01:52,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,063 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 15 treesize of output 17 [2022-11-20 20:01:52,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,076 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 14 treesize of output 16 [2022-11-20 20:01:52,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,103 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 [2022-11-20 20:01:52,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,111 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 15 treesize of output 17 [2022-11-20 20:01:52,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,264 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-20 20:01:52,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,275 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-20 20:01:52,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,549 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-20 20:01:52,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 63 [2022-11-20 20:01:52,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,577 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 20:01:52,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 49 [2022-11-20 20:01:52,599 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-20 20:01:52,646 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2022-11-20 20:01:52,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,835 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 0 case distinctions, treesize of input 86 treesize of output 69 [2022-11-20 20:01:52,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,851 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 0 case distinctions, treesize of input 86 treesize of output 65 [2022-11-20 20:01:53,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:53,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:53,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 40 [2022-11-20 20:01:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:53,075 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 20:01:53,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 16 [2022-11-20 20:01:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:01:53,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:53,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:53,484 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 190 treesize of output 194 [2022-11-20 20:01:53,571 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1742 (Array Int Int))) (let ((.cse0 (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| v_ArrVal_1742))) (store .cse3 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset|))))) (let ((.cse2 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_1743 (Array Int Int))) (<= 0 (+ 4 (select (select .cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| v_ArrVal_1743))) (store .cse1 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse2 4))))) (not (<= 0 .cse2)))))) (forall ((v_ArrVal_1742 (Array Int Int))) (let ((.cse6 (select (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| v_ArrVal_1742))) (store .cse7 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_1743 (Array Int Int))) (= |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| (select (let ((.cse4 (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| v_ArrVal_1743))) (store .cse5 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse5 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))))) (select .cse4 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ .cse6 4)))) (not (<= 0 .cse6))))) (forall ((v_ArrVal_1742 (Array Int Int))) (let ((.cse8 (let ((.cse11 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| v_ArrVal_1742))) (store .cse11 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse11 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset|))))) (let ((.cse10 (select (select .cse8 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_1743 (Array Int Int))) (< (select (select .cse8 (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_prepend_#t~mem10#1.base| v_ArrVal_1743))) (store .cse9 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse9 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse10 4)) (+ |c_ULTIMATE.start_dll_prepend_#t~mem10#1.offset| 5))) (not (<= 0 .cse10))))))) is different from false [2022-11-20 20:01:53,628 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) (and (forall ((v_ArrVal_1743 (Array Int Int)) (v_ArrVal_1742 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_1742))) (store .cse4 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse4 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (<= 0 .cse0)) (= (select (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_1743))) (store .cse2 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ .cse0 4)) .cse3)))) (forall ((v_ArrVal_1743 (Array Int Int)) (v_ArrVal_1742 (Array Int Int))) (let ((.cse6 (let ((.cse8 (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_1742))) (store .cse8 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse8 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset|))))) (let ((.cse5 (select (select .cse6 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (<= 0 .cse5)) (< (select (select .cse6 (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_1743))) (store .cse7 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse7 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse5 4)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|) 5)))))) (forall ((v_ArrVal_1743 (Array Int Int)) (v_ArrVal_1742 (Array Int Int))) (let ((.cse10 (let ((.cse12 (store |c_#memory_$Pointer$.offset| .cse3 v_ArrVal_1742))) (store .cse12 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse12 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.offset|))))) (let ((.cse9 (select (select .cse10 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (<= 0 .cse9)) (<= 0 (+ (select (select .cse10 (select (select (let ((.cse11 (store |c_#memory_$Pointer$.base| .cse3 v_ArrVal_1743))) (store .cse11 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse11 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_dll_prepend_~new_head~1#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse9 4)) 4)))))))) is different from false [2022-11-20 20:01:54,745 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (+ 4 |c_ULTIMATE.start_node_create_~temp~0#1.offset|))) (and (forall ((v_ArrVal_1736 (Array Int Int)) (v_ArrVal_1743 (Array Int Int)) (v_ArrVal_1742 (Array Int Int)) (v_ArrVal_1737 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store v_ArrVal_1737 .cse6 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1737) |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) (let ((.cse1 (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store v_ArrVal_1736 .cse6 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1736) |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) .cse4 v_ArrVal_1742))) (store .cse5 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse5 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.offset|))))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (<= 0 .cse0)) (<= 0 (+ (select (select .cse1 (select (select (let ((.cse2 (store .cse3 .cse4 v_ArrVal_1743))) (store .cse2 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse0 4)) 4)))))))) (forall ((v_ArrVal_1736 (Array Int Int)) (v_ArrVal_1743 (Array Int Int)) (v_ArrVal_1742 (Array Int Int)) (v_ArrVal_1737 (Array Int Int))) (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store v_ArrVal_1737 .cse6 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1737) |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))))) (let ((.cse7 (select (select .cse10 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) (let ((.cse11 (select (select (let ((.cse12 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store v_ArrVal_1736 .cse6 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1736) |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) .cse7 v_ArrVal_1742))) (store .cse12 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse12 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.offset|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= .cse7 (select (let ((.cse8 (let ((.cse9 (store .cse10 .cse7 v_ArrVal_1743))) (store .cse9 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse9 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|))))) (select .cse8 (select (select .cse8 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ .cse11 4))) (not (<= 0 .cse11))))))) (forall ((v_ArrVal_1736 (Array Int Int)) (v_ArrVal_1743 (Array Int Int)) (v_ArrVal_1742 (Array Int Int)) (v_ArrVal_1737 (Array Int Int))) (let ((.cse16 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store v_ArrVal_1737 .cse6 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1737) |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))))) (let ((.cse18 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| (store v_ArrVal_1736 .cse6 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_1736) |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|)))) (.cse17 (select (select .cse16 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))) (let ((.cse14 (let ((.cse19 (store .cse18 .cse17 v_ArrVal_1742))) (store .cse19 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse19 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.offset|))))) (let ((.cse13 (select (select .cse14 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (<= 0 .cse13)) (< (select (select .cse14 (select (select (let ((.cse15 (store .cse16 .cse17 v_ArrVal_1743))) (store .cse15 |c_ULTIMATE.start_dll_prepend_~head#1.base| (store (select .cse15 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base|))) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse13 4)) (+ 5 (select (select .cse18 |c_ULTIMATE.start_dll_prepend_~head#1.base|) |c_ULTIMATE.start_dll_prepend_~head#1.offset|))))))))))) is different from false [2022-11-20 20:01:54,981 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 11095 treesize of output 10629 [2022-11-20 20:01:55,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:55,229 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 10813 treesize of output 10323 [2022-11-20 20:01:55,415 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 22165 treesize of output 20637 [2022-11-20 20:01:55,730 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 21152 treesize of output 20832 [2022-11-20 20:01:56,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:56,444 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 20405 treesize of output 18905 [2022-11-20 20:01:56,850 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 18984 treesize of output 18904 [2022-11-20 20:01:56,948 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 20082 treesize of output 19234 [2022-11-20 20:01:57,060 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 20186 treesize of output 19874 [2022-11-20 20:01:57,197 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 19776 treesize of output 19460 [2022-11-20 20:01:57,596 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 19579 treesize of output 19403 [2022-11-20 20:01:57,710 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 19427 treesize of output 19407 [2022-11-20 20:01:58,042 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 19391 treesize of output 19377