./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur --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 583b66b9d59d34de12ff7e58a8eb24a95055476e3f5044dc2a7c6b2bb83f4c67 --- 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-38b53e6 [2022-11-26 00:46:24,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:46:24,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:46:24,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:46:24,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:46:24,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:46:24,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:46:24,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:46:24,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:46:24,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:46:25,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:46:25,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:46:25,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:46:25,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:46:25,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:46:25,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:46:25,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:46:25,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:46:25,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:46:25,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:46:25,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:46:25,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:46:25,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:46:25,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:46:25,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:46:25,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:46:25,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:46:25,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:46:25,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:46:25,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:46:25,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:46:25,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:46:25,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:46:25,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:46:25,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:46:25,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:46:25,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:46:25,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:46:25,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:46:25,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:46:25,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:46:25,052 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:46:25,100 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:46:25,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:46:25,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:46:25,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:46:25,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:46:25,102 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:46:25,102 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:46:25,103 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:46:25,103 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:46:25,103 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:46:25,104 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:46:25,105 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:46:25,105 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:46:25,105 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:46:25,106 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:46:25,106 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:46:25,106 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:46:25,106 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:46:25,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:46:25,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:46:25,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:46:25,108 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:46:25,108 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:46:25,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:46:25,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:46:25,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:46:25,109 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:46:25,110 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:46:25,110 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:46:25,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:46:25,111 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:46:25,111 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:46:25,111 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:46:25,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:46:25,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:46:25,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:46:25,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:46:25,112 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:46:25,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:46:25,113 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:46:25,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:46:25,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:46:25,114 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_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 583b66b9d59d34de12ff7e58a8eb24a95055476e3f5044dc2a7c6b2bb83f4c67 [2022-11-26 00:46:25,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:46:25,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:46:25,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:46:25,497 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:46:25,498 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:46:25,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2022-11-26 00:46:28,560 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:46:28,822 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:46:28,829 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2022-11-26 00:46:28,842 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/data/f39aafb65/cb7824097ac84530a6c6340d4890f1ee/FLAGd42299736 [2022-11-26 00:46:28,861 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/data/f39aafb65/cb7824097ac84530a6c6340d4890f1ee [2022-11-26 00:46:28,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:46:28,869 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:46:28,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:46:28,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:46:28,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:46:28,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:46:28" (1/1) ... [2022-11-26 00:46:28,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45820622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:28, skipping insertion in model container [2022-11-26 00:46:28,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:46:28" (1/1) ... [2022-11-26 00:46:28,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:46:28,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:46:29,249 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_b2807e1a-85b5-4b44-8dad-e2178a7f3405/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i[24729,24742] [2022-11-26 00:46:29,262 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:46:29,271 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:46:29,367 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_b2807e1a-85b5-4b44-8dad-e2178a7f3405/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i[24729,24742] [2022-11-26 00:46:29,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:46:29,395 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:46:29,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:29 WrapperNode [2022-11-26 00:46:29,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:46:29,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:46:29,398 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:46:29,398 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:46:29,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:29" (1/1) ... [2022-11-26 00:46:29,444 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:29" (1/1) ... [2022-11-26 00:46:29,484 INFO L138 Inliner]: procedures = 127, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 149 [2022-11-26 00:46:29,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:46:29,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:46:29,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:46:29,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:46:29,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:29" (1/1) ... [2022-11-26 00:46:29,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:29" (1/1) ... [2022-11-26 00:46:29,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:29" (1/1) ... [2022-11-26 00:46:29,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:29" (1/1) ... [2022-11-26 00:46:29,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:29" (1/1) ... [2022-11-26 00:46:29,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:29" (1/1) ... [2022-11-26 00:46:29,520 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:29" (1/1) ... [2022-11-26 00:46:29,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:29" (1/1) ... [2022-11-26 00:46:29,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:46:29,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:46:29,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:46:29,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:46:29,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:29" (1/1) ... [2022-11-26 00:46:29,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:46:29,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:46:29,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:46:29,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:46:29,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:46:29,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:46:29,616 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-26 00:46:29,616 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-26 00:46:29,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:46:29,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:46:29,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:46:29,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:46:29,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:46:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:46:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 00:46:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:46:29,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:46:29,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:46:29,746 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:46:29,748 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:46:30,251 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:46:30,307 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:46:30,307 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-26 00:46:30,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:46:30 BoogieIcfgContainer [2022-11-26 00:46:30,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:46:30,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:46:30,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:46:30,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:46:30,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:46:28" (1/3) ... [2022-11-26 00:46:30,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366fd204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:46:30, skipping insertion in model container [2022-11-26 00:46:30,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:46:29" (2/3) ... [2022-11-26 00:46:30,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@366fd204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:46:30, skipping insertion in model container [2022-11-26 00:46:30,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:46:30" (3/3) ... [2022-11-26 00:46:30,320 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_unequal.i [2022-11-26 00:46:30,343 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:46:30,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2022-11-26 00:46:30,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:46:30,418 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;@64996763, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:46:30,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2022-11-26 00:46:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 119 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:46:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:46:30,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:30,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:46:30,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:46:30,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:30,442 INFO L85 PathProgramCache]: Analyzing trace with hash 233508005, now seen corresponding path program 1 times [2022-11-26 00:46:30,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:30,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719260338] [2022-11-26 00:46:30,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:30,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:30,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:30,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719260338] [2022-11-26 00:46:30,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719260338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:30,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:46:30,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:46:30,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150515722] [2022-11-26 00:46:30,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:30,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:46:30,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:30,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:46:30,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:46:30,811 INFO L87 Difference]: Start difference. First operand has 124 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 119 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:31,064 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2022-11-26 00:46:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:46:31,067 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:46:31,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:31,077 INFO L225 Difference]: With dead ends: 121 [2022-11-26 00:46:31,077 INFO L226 Difference]: Without dead ends: 119 [2022-11-26 00:46:31,079 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 [2022-11-26 00:46:31,083 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:31,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 168 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:46:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-26 00:46:31,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-11-26 00:46:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 54 states have (on average 2.259259259259259) internal successors, (122), 114 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:46:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2022-11-26 00:46:31,140 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 5 [2022-11-26 00:46:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:31,141 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2022-11-26 00:46:31,142 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:31,142 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2022-11-26 00:46:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:46:31,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:31,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:46:31,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:46:31,144 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:46:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:31,144 INFO L85 PathProgramCache]: Analyzing trace with hash 233508006, now seen corresponding path program 1 times [2022-11-26 00:46:31,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:31,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35661536] [2022-11-26 00:46:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:31,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:31,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:31,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35661536] [2022-11-26 00:46:31,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35661536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:31,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:46:31,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:46:31,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034374284] [2022-11-26 00:46:31,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:31,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:46:31,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:31,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:46:31,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:46:31,265 INFO L87 Difference]: Start difference. First operand 119 states and 128 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:31,406 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2022-11-26 00:46:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:46:31,409 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:46:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:31,411 INFO L225 Difference]: With dead ends: 116 [2022-11-26 00:46:31,411 INFO L226 Difference]: Without dead ends: 116 [2022-11-26 00:46:31,411 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 [2022-11-26 00:46:31,412 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:31,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 173 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:46:31,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-26 00:46:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-26 00:46:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 54 states have (on average 2.2037037037037037) internal successors, (119), 111 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:46:31,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2022-11-26 00:46:31,428 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 5 [2022-11-26 00:46:31,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:31,428 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2022-11-26 00:46:31,428 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2022-11-26 00:46:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:46:31,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:31,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:31,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:46:31,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:46:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:31,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1136616120, now seen corresponding path program 1 times [2022-11-26 00:46:31,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:31,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466504020] [2022-11-26 00:46:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:31,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:31,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:31,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466504020] [2022-11-26 00:46:31,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466504020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:31,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:46:31,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:46:31,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227618345] [2022-11-26 00:46:31,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:31,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:46:31,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:31,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:46:31,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:46:31,543 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:46:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:31,579 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2022-11-26 00:46:31,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:46:31,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-26 00:46:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:31,580 INFO L225 Difference]: With dead ends: 127 [2022-11-26 00:46:31,580 INFO L226 Difference]: Without dead ends: 127 [2022-11-26 00:46:31,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:46:31,582 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 10 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:31,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 219 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:46:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-26 00:46:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2022-11-26 00:46:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 112 states have internal predecessors, (120), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:46:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2022-11-26 00:46:31,592 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 11 [2022-11-26 00:46:31,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:31,593 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2022-11-26 00:46:31,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-26 00:46:31,593 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2022-11-26 00:46:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:46:31,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:31,594 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:31,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:46:31,594 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:46:31,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:31,595 INFO L85 PathProgramCache]: Analyzing trace with hash -913978765, now seen corresponding path program 1 times [2022-11-26 00:46:31,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:31,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283548213] [2022-11-26 00:46:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:31,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:46:31,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:31,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283548213] [2022-11-26 00:46:31,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283548213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:31,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:46:31,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:46:31,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938018858] [2022-11-26 00:46:31,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:31,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:46:31,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:46:31,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:46:31,837 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:46:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:32,186 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2022-11-26 00:46:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:46:32,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-26 00:46:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:32,189 INFO L225 Difference]: With dead ends: 117 [2022-11-26 00:46:32,189 INFO L226 Difference]: Without dead ends: 117 [2022-11-26 00:46:32,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:46:32,190 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 18 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:32,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 316 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:46:32,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-26 00:46:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-11-26 00:46:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 111 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:46:32,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2022-11-26 00:46:32,198 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 19 [2022-11-26 00:46:32,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:32,198 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2022-11-26 00:46:32,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:46:32,199 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2022-11-26 00:46:32,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:46:32,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:32,199 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:32,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:46:32,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:46:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash -913978764, now seen corresponding path program 1 times [2022-11-26 00:46:32,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:32,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629394182] [2022-11-26 00:46:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:32,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:46:32,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:32,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629394182] [2022-11-26 00:46:32,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629394182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:32,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:46:32,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:46:32,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647068501] [2022-11-26 00:46:32,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:32,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:46:32,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:32,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:46:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:46:32,531 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:46:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:32,776 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2022-11-26 00:46:32,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:46:32,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-11-26 00:46:32,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:32,778 INFO L225 Difference]: With dead ends: 116 [2022-11-26 00:46:32,778 INFO L226 Difference]: Without dead ends: 116 [2022-11-26 00:46:32,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:46:32,780 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 16 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:32,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 340 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:46:32,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-26 00:46:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-11-26 00:46:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 110 states have internal predecessors, (118), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:46:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2022-11-26 00:46:32,787 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 19 [2022-11-26 00:46:32,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:32,787 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2022-11-26 00:46:32,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:46:32,788 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2022-11-26 00:46:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:46:32,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:32,789 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:32,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:46:32,789 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:46:32,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:32,790 INFO L85 PathProgramCache]: Analyzing trace with hash 2134702228, now seen corresponding path program 1 times [2022-11-26 00:46:32,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:32,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252364731] [2022-11-26 00:46:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:32,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:33,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:33,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252364731] [2022-11-26 00:46:33,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252364731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:46:33,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737952878] [2022-11-26 00:46:33,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:33,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:46:33,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:46:33,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:46:33,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:46:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:33,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:46:33,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:46:33,391 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 [2022-11-26 00:46:33,451 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_212 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_212))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-26 00:46:33,523 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:46:33,524 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 [2022-11-26 00:46:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-26 00:46:33,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:46:33,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737952878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:46:33,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1218333472] [2022-11-26 00:46:33,676 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-26 00:46:33,677 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:46:33,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:46:33,688 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:46:33,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:46:33,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:33,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:33,753 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 [2022-11-26 00:46:33,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:33,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:33,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:46:33,849 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 [2022-11-26 00:46:33,854 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 [2022-11-26 00:46:33,873 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 [2022-11-26 00:46:33,879 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 [2022-11-26 00:46:33,885 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 [2022-11-26 00:46:33,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:33,901 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 [2022-11-26 00:46:33,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:33,911 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 [2022-11-26 00:46:33,920 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 19 treesize of output 1 [2022-11-26 00:46:33,934 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 [2022-11-26 00:46:33,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:33,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:33,953 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 36 treesize of output 23 [2022-11-26 00:46:33,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:33,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:33,970 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 36 treesize of output 23 [2022-11-26 00:46:34,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:34,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:34,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:46:34,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:34,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:34,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:46:34,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:34,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:34,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:46:34,397 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:46:34,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:46:34,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:34,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:34,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:34,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:34,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:46:34,745 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:34,747 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:34,857 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:46:34,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:46:35,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:35,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:35,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:35,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:46:35,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:35,192 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:35,194 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:35,197 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:35,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:46:35,300 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 11 [2022-11-26 00:46:35,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:46:35,438 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:46:35,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:46:35,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:35,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:35,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:46:35,660 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 90 for LOIs [2022-11-26 00:46:36,150 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:46:41,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1419#(and (< |#StackHeapBarrier| |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (not (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| 0)) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_~data#1| |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_main_~len~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start_dll_circular_create_~head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_dll_circular_create_~len#1|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 8) |ULTIMATE.start_dll_circular_create_~data#1|) (= (select |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#s~0#1.base|) 0) (= (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 12) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| 0)) (< |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:46:41,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:46:41,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:46:41,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2022-11-26 00:46:41,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672888002] [2022-11-26 00:46:41,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:46:41,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:46:41,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:41,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:46:41,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=433, Unknown=2, NotChecked=42, Total=552 [2022-11-26 00:46:41,743 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:46:42,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:42,219 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2022-11-26 00:46:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:46:42,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-26 00:46:42,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:42,221 INFO L225 Difference]: With dead ends: 139 [2022-11-26 00:46:42,222 INFO L226 Difference]: Without dead ends: 139 [2022-11-26 00:46:42,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=94, Invalid=508, Unknown=2, NotChecked=46, Total=650 [2022-11-26 00:46:42,223 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 98 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:42,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 327 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 443 Invalid, 0 Unknown, 119 Unchecked, 0.3s Time] [2022-11-26 00:46:42,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-26 00:46:42,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2022-11-26 00:46:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 114 states have internal predecessors, (124), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:46:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2022-11-26 00:46:42,229 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 21 [2022-11-26 00:46:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:42,229 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2022-11-26 00:46:42,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:46:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2022-11-26 00:46:42,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:46:42,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:42,230 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:42,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:46:42,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:46:42,443 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:46:42,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:42,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2134702229, now seen corresponding path program 1 times [2022-11-26 00:46:42,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:42,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344427612] [2022-11-26 00:46:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:42,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:46:42,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:42,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344427612] [2022-11-26 00:46:42,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344427612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:46:42,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304980686] [2022-11-26 00:46:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:42,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:46:42,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:46:42,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:46:42,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:46:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:43,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:46:43,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:46:43,043 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 [2022-11-26 00:46:43,051 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 [2022-11-26 00:46:43,112 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_314 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_314))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-26 00:46:43,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,170 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 [2022-11-26 00:46:43,179 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:46:43,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 00:46:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-26 00:46:43,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:46:43,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304980686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:46:43,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896432471] [2022-11-26 00:46:43,352 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-26 00:46:43,353 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:46:43,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:46:43,353 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:46:43,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:46:43,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,378 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 [2022-11-26 00:46:43,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:46:43,427 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 [2022-11-26 00:46:43,432 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 [2022-11-26 00:46:43,440 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 [2022-11-26 00:46:43,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:46:43,451 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 [2022-11-26 00:46:43,460 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 [2022-11-26 00:46:43,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,469 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 [2022-11-26 00:46:43,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,477 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 [2022-11-26 00:46:43,489 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 [2022-11-26 00:46:43,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,498 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 36 treesize of output 23 [2022-11-26 00:46:43,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,510 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 36 treesize of output 23 [2022-11-26 00:46:43,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:46:43,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:46:43,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:46:43,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,688 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:46:43,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:46:43,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:43,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:43,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:43,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:43,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:46:43,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:43,819 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:46:43,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:46:43,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:46:43,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:43,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:43,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:43,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:43,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:46:44,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:46:44,018 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 11 [2022-11-26 00:46:44,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:44,097 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:46:44,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:46:44,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:44,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:44,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:46:44,137 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 94 for LOIs [2022-11-26 00:46:44,552 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:46:49,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1783#(and (< |#StackHeapBarrier| |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 4) 0) (not (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| 0)) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_~data#1| |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_main_~len~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start_dll_circular_create_~head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#in~len#1| |ULTIMATE.start_dll_circular_create_~len#1|) (< (select |#length| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 8)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~data~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 8) |ULTIMATE.start_dll_circular_create_~data#1|) (= (select |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#s~0#1.base|) 0) (= (select |#length| |ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 12) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| 0)) (< |ULTIMATE.start_dll_circular_create_~new_head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 00:46:49,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:46:49,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:46:49,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2022-11-26 00:46:49,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192871468] [2022-11-26 00:46:49,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:46:49,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:46:49,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:49,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:46:49,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=521, Unknown=2, NotChecked=46, Total=650 [2022-11-26 00:46:49,791 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:46:50,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:46:50,359 INFO L93 Difference]: Finished difference Result 122 states and 133 transitions. [2022-11-26 00:46:50,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:46:50,359 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-11-26 00:46:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:46:50,360 INFO L225 Difference]: With dead ends: 122 [2022-11-26 00:46:50,360 INFO L226 Difference]: Without dead ends: 122 [2022-11-26 00:46:50,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=100, Invalid=604, Unknown=2, NotChecked=50, Total=756 [2022-11-26 00:46:50,362 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 4 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:46:50,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 425 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 558 Invalid, 0 Unknown, 125 Unchecked, 0.4s Time] [2022-11-26 00:46:50,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-26 00:46:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-11-26 00:46:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 114 states have internal predecessors, (123), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:46:50,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 131 transitions. [2022-11-26 00:46:50,374 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 131 transitions. Word has length 21 [2022-11-26 00:46:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:46:50,374 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 131 transitions. [2022-11-26 00:46:50,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:46:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 131 transitions. [2022-11-26 00:46:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:46:50,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:46:50,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:46:50,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:46:50,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:46:50,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:46:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:46:50,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1545365550, now seen corresponding path program 1 times [2022-11-26 00:46:50,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:46:50,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464880958] [2022-11-26 00:46:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:50,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:46:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:46:50,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:46:50,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464880958] [2022-11-26 00:46:50,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464880958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:46:50,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800628232] [2022-11-26 00:46:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:46:50,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:46:50,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:46:50,704 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:46:50,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:46:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:46:50,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:46:50,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:46:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:46:50,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:46:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:46:50,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800628232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:46:50,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1656137178] [2022-11-26 00:46:50,909 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:46:50,909 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:46:50,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:46:50,910 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:46:50,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:46:50,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:50,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:50,934 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 [2022-11-26 00:46:50,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:50,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:50,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:46:50,983 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 [2022-11-26 00:46:50,988 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 [2022-11-26 00:46:50,994 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 [2022-11-26 00:46:51,000 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 [2022-11-26 00:46:51,005 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 [2022-11-26 00:46:51,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,013 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 [2022-11-26 00:46:51,019 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 [2022-11-26 00:46:51,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,025 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 [2022-11-26 00:46:51,040 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 [2022-11-26 00:46:51,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,048 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 36 treesize of output 23 [2022-11-26 00:46:51,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,092 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 36 treesize of output 23 [2022-11-26 00:46:51,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:46:51,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:46:51,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:46:51,375 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:46:51,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:46:51,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:51,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:46:51,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:51,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:51,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:51,632 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:51,634 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:51,718 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:46:51,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:46:51,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-26 00:46:51,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:46:51,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:51,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-26 00:46:52,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:52,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-26 00:46:52,031 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:52,033 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:52,036 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:52,038 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:52,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:46:52,100 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 11 [2022-11-26 00:46:52,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:46:52,265 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:46:52,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:46:52,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:46:52,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:52,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:52,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:52,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:52,572 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:52,574 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:52,577 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:52,660 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:46:52,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:46:52,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:52,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:46:52,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:52,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:46:52,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:46:52,915 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:52,918 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:52,920 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:46:53,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:53,048 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 278 treesize of output 262 [2022-11-26 00:46:53,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:53,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:53,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:53,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-26 00:46:53,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:53,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:53,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:53,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:46:53,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-26 00:46:53,205 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:46:53,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:46:53,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:53,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:46:53,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:46:53,407 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 90 for LOIs [2022-11-26 00:46:53,770 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:46:58,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1656137178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:46:58,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:46:58,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6, 6] total 17 [2022-11-26 00:46:58,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777437330] [2022-11-26 00:46:58,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:46:58,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:46:58,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:46:58,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:46:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=230, Unknown=1, NotChecked=0, Total=272 [2022-11-26 00:46:58,998 INFO L87 Difference]: Start difference. First operand 120 states and 131 transitions. Second operand has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:47:02,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:02,715 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2022-11-26 00:47:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:47:02,716 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-11-26 00:47:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:02,717 INFO L225 Difference]: With dead ends: 126 [2022-11-26 00:47:02,717 INFO L226 Difference]: Without dead ends: 126 [2022-11-26 00:47:02,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=51, Invalid=290, Unknown=1, NotChecked=0, Total=342 [2022-11-26 00:47:02,718 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 2 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 1 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:02,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 336 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1138 Invalid, 8 Unknown, 0 Unchecked, 3.1s Time] [2022-11-26 00:47:02,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-26 00:47:02,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-26 00:47:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 64 states have (on average 1.984375) internal successors, (127), 119 states have internal predecessors, (127), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:47:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2022-11-26 00:47:02,725 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 23 [2022-11-26 00:47:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:02,725 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2022-11-26 00:47:02,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:47:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2022-11-26 00:47:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:47:02,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:02,727 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:02,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-26 00:47:02,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:02,932 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:47:02,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:02,933 INFO L85 PathProgramCache]: Analyzing trace with hash -666673337, now seen corresponding path program 1 times [2022-11-26 00:47:02,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:02,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187357674] [2022-11-26 00:47:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:02,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:02,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:47:02,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:02,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187357674] [2022-11-26 00:47:02,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187357674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:03,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716205704] [2022-11-26 00:47:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:03,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:03,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:03,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:03,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:47:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:03,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:47:03,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:47:03,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:03,181 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-26 00:47:03,181 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 12 treesize of output 11 [2022-11-26 00:47:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:47:03,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716205704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:47:03,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1965976498] [2022-11-26 00:47:03,209 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:47:03,209 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:47:03,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:47:03,210 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:47:03,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:47:03,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,261 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 [2022-11-26 00:47:03,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:03,302 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 [2022-11-26 00:47:03,306 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 [2022-11-26 00:47:03,314 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 [2022-11-26 00:47:03,318 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 [2022-11-26 00:47:03,324 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 [2022-11-26 00:47:03,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,331 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 [2022-11-26 00:47:03,337 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 [2022-11-26 00:47:03,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,343 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 [2022-11-26 00:47:03,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,354 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 36 treesize of output 23 [2022-11-26 00:47:03,359 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 [2022-11-26 00:47:03,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,367 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 36 treesize of output 23 [2022-11-26 00:47:03,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:47:03,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:03,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:47:03,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,509 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:03,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:03,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:03,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:03,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:03,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:03,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:03,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,609 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:03,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:03,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:03,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:03,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:03,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:03,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:03,736 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 11 [2022-11-26 00:47:03,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:47:03,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:47:03,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:03,815 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:47:03,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-26 00:47:03,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:03,847 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:47:03,847 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 28 treesize of output 34 [2022-11-26 00:47:03,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,865 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 [2022-11-26 00:47:03,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:03,930 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:47:03,931 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 28 treesize of output 30 [2022-11-26 00:47:03,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,947 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 [2022-11-26 00:47:03,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:03,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:03,977 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:47:03,977 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 28 treesize of output 34 [2022-11-26 00:47:04,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:04,098 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:04,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:04,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:04,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:04,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:04,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:04,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:04,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:04,219 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:04,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:04,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:04,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:04,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:04,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:04,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:04,367 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 11 [2022-11-26 00:47:04,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:47:04,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:47:04,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:04,424 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:04,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:04,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:04,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:04,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:04,456 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 94 for LOIs [2022-11-26 00:47:04,845 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:47:10,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2589#(and (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |#NULL.offset| 0) (not (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:47:10,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:47:10,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:47:10,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2022-11-26 00:47:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614481047] [2022-11-26 00:47:10,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:47:10,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:47:10,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:10,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:47:10,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=321, Unknown=1, NotChecked=0, Total=380 [2022-11-26 00:47:10,411 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:47:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:10,639 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2022-11-26 00:47:10,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:47:10,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-26 00:47:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:10,641 INFO L225 Difference]: With dead ends: 131 [2022-11-26 00:47:10,641 INFO L226 Difference]: Without dead ends: 131 [2022-11-26 00:47:10,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=72, Invalid=387, Unknown=3, NotChecked=0, Total=462 [2022-11-26 00:47:10,642 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 8 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:10,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 215 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:47:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-26 00:47:10,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2022-11-26 00:47:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 122 states have internal predecessors, (132), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:47:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 140 transitions. [2022-11-26 00:47:10,649 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 140 transitions. Word has length 24 [2022-11-26 00:47:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:10,650 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 140 transitions. [2022-11-26 00:47:10,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:47:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 140 transitions. [2022-11-26 00:47:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:47:10,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:10,651 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:10,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-26 00:47:10,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:10,852 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:47:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash -666673336, now seen corresponding path program 1 times [2022-11-26 00:47:10,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:10,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265380223] [2022-11-26 00:47:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:10,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:47:11,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:11,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265380223] [2022-11-26 00:47:11,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265380223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:11,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818549816] [2022-11-26 00:47:11,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:11,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:11,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:11,055 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:11,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:47:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:11,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:47:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:47:11,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:11,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:47:11,375 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 20 treesize of output 24 [2022-11-26 00:47:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:47:11,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818549816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:47:11,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1219740784] [2022-11-26 00:47:11,513 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:47:11,513 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:47:11,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:47:11,513 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:47:11,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:47:11,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,533 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 [2022-11-26 00:47:11,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:11,573 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 [2022-11-26 00:47:11,577 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 [2022-11-26 00:47:11,585 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 [2022-11-26 00:47:11,589 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 [2022-11-26 00:47:11,593 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 [2022-11-26 00:47:11,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,602 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 [2022-11-26 00:47:11,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,608 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 [2022-11-26 00:47:11,613 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 [2022-11-26 00:47:11,621 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 [2022-11-26 00:47:11,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,629 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 36 treesize of output 23 [2022-11-26 00:47:11,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,643 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 36 treesize of output 23 [2022-11-26 00:47:11,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:47:11,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:11,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:47:11,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,790 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:11,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:11,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:11,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:11,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:11,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:11,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:11,892 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:11,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:11,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:11,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:11,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:11,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:11,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:12,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:12,058 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 278 treesize of output 262 [2022-11-26 00:47:12,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:12,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:12,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:12,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:12,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-26 00:47:12,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:12,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:12,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:12,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:12,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-26 00:47:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:12,218 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 260 treesize of output 238 [2022-11-26 00:47:12,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:12,249 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:47:12,250 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 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-26 00:47:12,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:12,278 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 00:47:12,278 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 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-26 00:47:12,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:12,508 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 260 treesize of output 238 [2022-11-26 00:47:12,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:12,536 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 00:47:12,537 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 1 case distinctions, treesize of input 261 treesize of output 257 [2022-11-26 00:47:12,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:12,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:12,569 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:47:12,570 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 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-26 00:47:12,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:12,795 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:12,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:12,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:12,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:12,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:12,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:12,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:12,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:12,897 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:12,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:12,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:12,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:12,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:12,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:12,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:13,054 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 [2022-11-26 00:47:13,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:13,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:47:13,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:13,097 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:13,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:13,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:13,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:13,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:13,142 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 94 for LOIs [2022-11-26 00:47:13,519 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:47:19,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3021#(and (< (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4)) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:47:19,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:47:19,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:47:19,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-26 00:47:19,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99646679] [2022-11-26 00:47:19,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:47:19,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 00:47:19,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:19,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 00:47:19,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:47:19,676 INFO L87 Difference]: Start difference. First operand 129 states and 140 transitions. Second operand has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-26 00:47:20,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:20,082 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2022-11-26 00:47:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:47:20,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 24 [2022-11-26 00:47:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:20,084 INFO L225 Difference]: With dead ends: 134 [2022-11-26 00:47:20,084 INFO L226 Difference]: Without dead ends: 134 [2022-11-26 00:47:20,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:47:20,086 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 13 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:20,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1048 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:47:20,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-26 00:47:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2022-11-26 00:47:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 67 states have (on average 1.955223880597015) internal successors, (131), 122 states have internal predecessors, (131), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:47:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2022-11-26 00:47:20,094 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 24 [2022-11-26 00:47:20,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:20,094 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2022-11-26 00:47:20,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-26 00:47:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2022-11-26 00:47:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:47:20,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:20,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:20,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:20,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:20,299 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:47:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash 807963038, now seen corresponding path program 1 times [2022-11-26 00:47:20,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:20,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057840464] [2022-11-26 00:47:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:20,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:47:20,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:20,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057840464] [2022-11-26 00:47:20,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057840464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:47:20,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:47:20,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:47:20,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808322051] [2022-11-26 00:47:20,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:47:20,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:47:20,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:20,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:47:20,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:47:20,451 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:47:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:20,696 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2022-11-26 00:47:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:47:20,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-26 00:47:20,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:20,698 INFO L225 Difference]: With dead ends: 129 [2022-11-26 00:47:20,698 INFO L226 Difference]: Without dead ends: 129 [2022-11-26 00:47:20,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:47:20,699 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 19 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:20,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 360 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:47:20,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-26 00:47:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-11-26 00:47:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 121 states have internal predecessors, (130), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:47:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2022-11-26 00:47:20,704 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 25 [2022-11-26 00:47:20,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:20,704 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2022-11-26 00:47:20,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:47:20,704 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2022-11-26 00:47:20,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-26 00:47:20,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:20,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:20,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-26 00:47:20,706 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:47:20,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:20,706 INFO L85 PathProgramCache]: Analyzing trace with hash 807963039, now seen corresponding path program 1 times [2022-11-26 00:47:20,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:20,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992891496] [2022-11-26 00:47:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:20,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:20,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:47:20,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:20,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992891496] [2022-11-26 00:47:20,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992891496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:47:20,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:47:20,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:47:20,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343248261] [2022-11-26 00:47:20,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:47:20,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:47:20,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:20,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:47:20,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:47:20,948 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:47:21,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:21,213 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2022-11-26 00:47:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:47:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-26 00:47:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:21,215 INFO L225 Difference]: With dead ends: 127 [2022-11-26 00:47:21,215 INFO L226 Difference]: Without dead ends: 127 [2022-11-26 00:47:21,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:47:21,216 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 15 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:21,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 390 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:47:21,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-26 00:47:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-11-26 00:47:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 120 states have internal predecessors, (129), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:47:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2022-11-26 00:47:21,220 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 25 [2022-11-26 00:47:21,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:21,220 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2022-11-26 00:47:21,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-26 00:47:21,220 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2022-11-26 00:47:21,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-26 00:47:21,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:21,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:21,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-26 00:47:21,221 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:47:21,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:21,221 INFO L85 PathProgramCache]: Analyzing trace with hash 700732866, now seen corresponding path program 1 times [2022-11-26 00:47:21,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:21,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326084690] [2022-11-26 00:47:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:21,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:47:21,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:21,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326084690] [2022-11-26 00:47:21,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326084690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:21,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291814037] [2022-11-26 00:47:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:21,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:21,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:21,749 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:21,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:47:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:21,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 00:47:21,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:21,948 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 [2022-11-26 00:47:21,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:21,965 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_923 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_923)))) is different from true [2022-11-26 00:47:21,982 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_#res#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_923 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_923)))) is different from true [2022-11-26 00:47:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:21,990 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 [2022-11-26 00:47:22,038 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2022-11-26 00:47:22,060 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:47:22,061 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 14 [2022-11-26 00:47:22,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,210 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-11-26 00:47:22,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2022-11-26 00:47:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 10 not checked. [2022-11-26 00:47:22,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:22,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291814037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:22,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686905068] [2022-11-26 00:47:22,472 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-26 00:47:22,472 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:47:22,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:47:22,473 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:47:22,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:47:22,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,502 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 [2022-11-26 00:47:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:22,558 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 [2022-11-26 00:47:22,566 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 [2022-11-26 00:47:22,575 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 [2022-11-26 00:47:22,580 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 [2022-11-26 00:47:22,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:22,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,597 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 [2022-11-26 00:47:22,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,603 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 [2022-11-26 00:47:22,609 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 [2022-11-26 00:47:22,620 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 [2022-11-26 00:47:22,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,628 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 36 treesize of output 23 [2022-11-26 00:47:22,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,637 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 36 treesize of output 23 [2022-11-26 00:47:22,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:47:22,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:22,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:22,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:47:22,831 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:47:22,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:47:23,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:23,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-26 00:47:23,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-26 00:47:23,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:47:23,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:23,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-26 00:47:23,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:23,063 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:23,067 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:23,068 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:23,138 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:47:23,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:47:23,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:23,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:23,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:23,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:23,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:23,405 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:23,407 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:23,409 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:23,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:23,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:23,519 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 278 treesize of output 262 [2022-11-26 00:47:23,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:23,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:23,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:23,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-26 00:47:23,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:23,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:23,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:23,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-26 00:47:23,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:23,663 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 260 treesize of output 238 [2022-11-26 00:47:23,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:23,689 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 00:47:23,690 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 1 case distinctions, treesize of input 261 treesize of output 257 [2022-11-26 00:47:23,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:23,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:23,722 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:47:23,723 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 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-26 00:47:23,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:23,878 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 260 treesize of output 238 [2022-11-26 00:47:23,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:23,904 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 00:47:23,904 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 1 case distinctions, treesize of input 261 treesize of output 257 [2022-11-26 00:47:23,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:23,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:23,935 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:47:23,935 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 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-26 00:47:24,128 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 [2022-11-26 00:47:24,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:47:24,151 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 [2022-11-26 00:47:24,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:24,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:47:24,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:24,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:47:24,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 00:47:24,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:24,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:24,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:24,331 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:24,332 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:24,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:47:24,352 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 19 [2022-11-26 00:47:24,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:24,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:24,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:24,398 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:24,399 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:24,436 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:24,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:24,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:24,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:24,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:24,553 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:24,554 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:24,572 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:24,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:24,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:47:24,594 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 19 [2022-11-26 00:47:24,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:24,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:24,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:24,618 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:24,618 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:24,805 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:47:24,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:47:24,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:24,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:24,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:25,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:25,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:25,029 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:25,031 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:25,032 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:25,111 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:47:25,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:47:25,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:25,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:25,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:25,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:25,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:25,354 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:25,357 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:25,359 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:25,426 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 [2022-11-26 00:47:25,434 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 [2022-11-26 00:47:25,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:47:25,494 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:47:25,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:47:25,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:25,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:25,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:25,653 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 21 for LOIs [2022-11-26 00:47:25,662 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 [2022-11-26 00:47:25,667 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 [2022-11-26 00:47:25,684 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 [2022-11-26 00:47:25,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:47:25,694 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 [2022-11-26 00:47:25,707 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 [2022-11-26 00:47:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:25,716 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 [2022-11-26 00:47:25,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:25,724 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 [2022-11-26 00:47:25,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:25,744 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 36 treesize of output 23 [2022-11-26 00:47:25,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:25,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:25,753 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 36 treesize of output 23 [2022-11-26 00:47:25,762 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 [2022-11-26 00:47:25,764 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:47:30,754 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4015#(and (= |ULTIMATE.start_dll_circular_prepend_~data#1| |ULTIMATE.start_dll_circular_prepend_#in~data#1|) (= (select |#valid| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 1) (= |ULTIMATE.start_dll_circular_prepend_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 4) 0) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 0) 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_prepend_~data#1| (select (select |#memory_int| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 8)) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= (select |#length| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 12) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 0) (= |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset| |ULTIMATE.start_dll_circular_prepend_~head#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 4) 0) (not (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| 0)) (not (= (select |#valid| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) 1)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= |ULTIMATE.start_dll_circular_prepend_~head#1.base| |ULTIMATE.start_dll_circular_prepend_#in~head#1.base|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| |ULTIMATE.start_dll_circular_prepend_#in~data#1|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 0)) (= |#NULL.base| 0))' at error location [2022-11-26 00:47:30,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:47:30,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:47:30,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2022-11-26 00:47:30,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433595607] [2022-11-26 00:47:30,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:47:30,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:47:30,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:30,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:47:30,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1416, Unknown=3, NotChecked=234, Total=1806 [2022-11-26 00:47:30,758 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 20 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 00:47:31,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:31,446 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2022-11-26 00:47:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:47:31,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2022-11-26 00:47:31,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:31,447 INFO L225 Difference]: With dead ends: 136 [2022-11-26 00:47:31,448 INFO L226 Difference]: Without dead ends: 136 [2022-11-26 00:47:31,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=212, Invalid=1867, Unknown=3, NotChecked=270, Total=2352 [2022-11-26 00:47:31,449 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 454 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 383 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:31,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 280 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 496 Invalid, 0 Unknown, 383 Unchecked, 0.5s Time] [2022-11-26 00:47:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-26 00:47:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 119. [2022-11-26 00:47:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 67 states have (on average 1.8059701492537314) internal successors, (121), 112 states have internal predecessors, (121), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:47:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2022-11-26 00:47:31,453 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 34 [2022-11-26 00:47:31,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:31,453 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2022-11-26 00:47:31,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 17 states have internal predecessors, (50), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 00:47:31,453 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2022-11-26 00:47:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-26 00:47:31,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:31,454 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:31,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:31,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:47:31,655 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:47:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:31,655 INFO L85 PathProgramCache]: Analyzing trace with hash 700732867, now seen corresponding path program 1 times [2022-11-26 00:47:31,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:31,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068763874] [2022-11-26 00:47:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:31,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:47:32,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068763874] [2022-11-26 00:47:32,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068763874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:32,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204621035] [2022-11-26 00:47:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:32,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:32,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:32,418 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:32,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:47:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:32,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-26 00:47:32,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:32,639 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 [2022-11-26 00:47:32,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:32,662 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1101 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1101) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-26 00:47:32,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,690 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 [2022-11-26 00:47:32,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:32,737 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_1102 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1102) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-26 00:47:32,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,767 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 [2022-11-26 00:47:32,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:32,838 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_1103 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_1103) |c_#length|)))) is different from true [2022-11-26 00:47:32,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:32,869 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 [2022-11-26 00:47:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 15 not checked. [2022-11-26 00:47:32,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:35,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204621035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:35,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306325926] [2022-11-26 00:47:35,003 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-26 00:47:35,003 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:47:35,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:47:35,003 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:47:35,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:47:35,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,026 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 [2022-11-26 00:47:35,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:35,060 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 [2022-11-26 00:47:35,063 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 [2022-11-26 00:47:35,074 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 [2022-11-26 00:47:35,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:35,083 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 [2022-11-26 00:47:35,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,091 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 [2022-11-26 00:47:35,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,097 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 [2022-11-26 00:47:35,102 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 [2022-11-26 00:47:35,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,112 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 36 treesize of output 23 [2022-11-26 00:47:35,118 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 [2022-11-26 00:47:35,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,143 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 36 treesize of output 23 [2022-11-26 00:47:35,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:47:35,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:35,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:47:35,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,277 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:35,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:35,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:35,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:35,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:35,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:35,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:35,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,387 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:35,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:35,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:35,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:35,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:35,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:35,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:35,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:47:35,515 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 11 [2022-11-26 00:47:35,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:47:35,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,565 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 [2022-11-26 00:47:35,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:35,587 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:47:35,587 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 28 treesize of output 30 [2022-11-26 00:47:35,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:35,620 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:47:35,620 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 28 treesize of output 34 [2022-11-26 00:47:35,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:35,679 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:47:35,679 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 28 treesize of output 30 [2022-11-26 00:47:35,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,694 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 [2022-11-26 00:47:35,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:35,723 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:47:35,723 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 28 treesize of output 34 [2022-11-26 00:47:35,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:47:35,789 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 [2022-11-26 00:47:35,800 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 [2022-11-26 00:47:35,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 00:47:35,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:47:35,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:47:35,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:35,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:35,996 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:35,997 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:36,018 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:36,019 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:36,038 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:47:36,039 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 19 [2022-11-26 00:47:36,090 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:36,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:36,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:36,181 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:36,182 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:36,202 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:36,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:36,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:47:36,220 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 19 [2022-11-26 00:47:36,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:36,243 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:36,244 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:36,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,353 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:36,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:36,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:36,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:36,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:36,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:36,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:36,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,449 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:36,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:36,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:36,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:36,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:36,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:36,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:36,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:47:36,598 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 11 [2022-11-26 00:47:36,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:47:36,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,638 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:36,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:36,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:36,678 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 21 for LOIs [2022-11-26 00:47:36,699 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 [2022-11-26 00:47:36,707 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 [2022-11-26 00:47:36,722 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 [2022-11-26 00:47:36,727 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 [2022-11-26 00:47:36,735 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 [2022-11-26 00:47:36,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,751 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 [2022-11-26 00:47:36,757 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 [2022-11-26 00:47:36,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,767 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 [2022-11-26 00:47:36,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,800 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 36 treesize of output 23 [2022-11-26 00:47:36,808 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 [2022-11-26 00:47:36,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:36,820 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 36 treesize of output 23 [2022-11-26 00:47:36,828 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:47:41,222 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4429#(and (= |ULTIMATE.start_dll_circular_prepend_~data#1| |ULTIMATE.start_dll_circular_prepend_#in~data#1|) (= (select |#valid| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 1) (= |ULTIMATE.start_dll_circular_prepend_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 4) 0) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 0) 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_prepend_~data#1| (select (select |#memory_int| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 8)) (< (select |#length| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) (+ |ULTIMATE.start_dll_circular_prepend_~head#1.offset| 4)) (= |ULTIMATE.start_main_~uneq~0#1| 5) (= (select |#length| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 12) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 0) (= |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset| |ULTIMATE.start_dll_circular_prepend_~head#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 4) 0) (not (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| 0)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= |ULTIMATE.start_dll_circular_prepend_~head#1.base| |ULTIMATE.start_dll_circular_prepend_#in~head#1.base|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| |ULTIMATE.start_dll_circular_prepend_#in~data#1|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 0)) (= |#NULL.base| 0))' at error location [2022-11-26 00:47:41,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:47:41,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:47:41,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2022-11-26 00:47:41,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564959702] [2022-11-26 00:47:41,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:47:41,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:47:41,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:47:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1080, Unknown=3, NotChecked=204, Total=1406 [2022-11-26 00:47:41,226 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand has 17 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:47:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:41,738 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2022-11-26 00:47:41,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:47:41,739 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 34 [2022-11-26 00:47:41,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:41,740 INFO L225 Difference]: With dead ends: 128 [2022-11-26 00:47:41,740 INFO L226 Difference]: Without dead ends: 128 [2022-11-26 00:47:41,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=143, Invalid=1272, Unknown=3, NotChecked=222, Total=1640 [2022-11-26 00:47:41,741 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 241 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:41,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 215 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 417 Invalid, 0 Unknown, 354 Unchecked, 0.4s Time] [2022-11-26 00:47:41,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-26 00:47:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2022-11-26 00:47:41,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 67 states have (on average 1.6865671641791045) internal successors, (113), 104 states have internal predecessors, (113), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:47:41,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2022-11-26 00:47:41,746 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 34 [2022-11-26 00:47:41,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:41,746 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2022-11-26 00:47:41,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-26 00:47:41,747 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2022-11-26 00:47:41,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-26 00:47:41,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:41,748 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:41,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:41,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:47:41,954 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:47:41,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:41,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1152350253, now seen corresponding path program 1 times [2022-11-26 00:47:41,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:41,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095471430] [2022-11-26 00:47:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:41,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:47:42,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:42,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095471430] [2022-11-26 00:47:42,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095471430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:42,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631626320] [2022-11-26 00:47:42,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:42,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:42,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:42,047 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:42,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:47:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:42,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:47:42,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:47:42,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:47:42,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631626320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:47:42,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:47:42,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-26 00:47:42,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195806626] [2022-11-26 00:47:42,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:47:42,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:47:42,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:42,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:47:42,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:47:42,275 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:47:42,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:42,307 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2022-11-26 00:47:42,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:47:42,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-11-26 00:47:42,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:42,309 INFO L225 Difference]: With dead ends: 99 [2022-11-26 00:47:42,309 INFO L226 Difference]: Without dead ends: 99 [2022-11-26 00:47:42,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:47:42,310 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 81 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:42,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 104 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:47:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-26 00:47:42,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-26 00:47:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.65) internal successors, (99), 93 states have internal predecessors, (99), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:47:42,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2022-11-26 00:47:42,315 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 34 [2022-11-26 00:47:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:42,315 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2022-11-26 00:47:42,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:47:42,315 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2022-11-26 00:47:42,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:47:42,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:42,316 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:42,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-26 00:47:42,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:42,528 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:47:42,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:42,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1991770355, now seen corresponding path program 1 times [2022-11-26 00:47:42,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:42,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24438991] [2022-11-26 00:47:42,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:42,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:47:42,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:42,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24438991] [2022-11-26 00:47:42,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24438991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:47:42,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:47:42,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:47:42,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018511865] [2022-11-26 00:47:42,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:47:42,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:47:42,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:42,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:47:42,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:47:42,678 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand has 6 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:47:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:42,867 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-11-26 00:47:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:47:42,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-11-26 00:47:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:42,868 INFO L225 Difference]: With dead ends: 112 [2022-11-26 00:47:42,868 INFO L226 Difference]: Without dead ends: 112 [2022-11-26 00:47:42,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:47:42,869 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 68 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:42,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 186 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:47:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-26 00:47:42,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 95. [2022-11-26 00:47:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 89 states have internal predecessors, (95), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:47:42,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2022-11-26 00:47:42,872 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 37 [2022-11-26 00:47:42,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:42,872 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2022-11-26 00:47:42,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:47:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2022-11-26 00:47:42,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:47:42,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:42,873 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:42,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 00:47:42,874 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:47:42,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:42,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1991770356, now seen corresponding path program 1 times [2022-11-26 00:47:42,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:42,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309938543] [2022-11-26 00:47:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:42,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:47:43,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:43,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309938543] [2022-11-26 00:47:43,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309938543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:47:43,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:47:43,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:47:43,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673769529] [2022-11-26 00:47:43,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:47:43,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:47:43,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:43,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:47:43,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:47:43,116 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 6 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:47:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:43,286 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2022-11-26 00:47:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:47:43,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-11-26 00:47:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:43,287 INFO L225 Difference]: With dead ends: 91 [2022-11-26 00:47:43,287 INFO L226 Difference]: Without dead ends: 91 [2022-11-26 00:47:43,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:47:43,288 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 67 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:43,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 199 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:47:43,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-26 00:47:43,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-26 00:47:43,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 85 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:47:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2022-11-26 00:47:43,291 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 37 [2022-11-26 00:47:43,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:43,292 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2022-11-26 00:47:43,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:47:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2022-11-26 00:47:43,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:47:43,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:43,293 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:43,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:47:43,293 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:47:43,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:43,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1991781278, now seen corresponding path program 1 times [2022-11-26 00:47:43,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:43,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361013192] [2022-11-26 00:47:43,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:43,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:47:44,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:44,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361013192] [2022-11-26 00:47:44,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361013192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:44,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912494003] [2022-11-26 00:47:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:44,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:44,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:44,041 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:44,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:47:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:44,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:47:44,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:44,354 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 [2022-11-26 00:47:44,525 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 9 treesize of output 5 [2022-11-26 00:47:44,683 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_1627 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1627) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_1624 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_1624))))) is different from true [2022-11-26 00:47:44,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:44,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:47:44,713 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-26 00:47:44,713 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 21 treesize of output 29 [2022-11-26 00:47:44,760 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 17 treesize of output 9 [2022-11-26 00:47:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-26 00:47:44,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:44,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912494003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:44,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [577652511] [2022-11-26 00:47:44,876 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 00:47:44,876 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:47:44,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:47:44,877 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:47:44,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:47:44,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:44,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:44,901 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 [2022-11-26 00:47:44,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:44,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:44,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:44,945 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 [2022-11-26 00:47:44,958 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 [2022-11-26 00:47:44,965 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 [2022-11-26 00:47:44,970 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 [2022-11-26 00:47:44,974 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 [2022-11-26 00:47:44,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:44,982 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 [2022-11-26 00:47:44,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:44,988 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 [2022-11-26 00:47:44,994 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 [2022-11-26 00:47:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,003 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 36 treesize of output 23 [2022-11-26 00:47:45,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,011 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 36 treesize of output 23 [2022-11-26 00:47:45,017 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 [2022-11-26 00:47:45,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:47:45,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:45,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:47:45,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,148 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:45,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:45,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:45,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:45,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:45,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:45,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:45,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,241 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:45,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:45,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:45,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:45,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:45,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:45,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:45,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:47:45,373 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 11 [2022-11-26 00:47:45,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:47:45,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,430 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 [2022-11-26 00:47:45,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:45,460 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:47:45,460 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 28 treesize of output 34 [2022-11-26 00:47:45,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:45,488 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:47:45,489 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 28 treesize of output 30 [2022-11-26 00:47:45,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,542 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 [2022-11-26 00:47:45,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:45,563 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:47:45,564 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 28 treesize of output 30 [2022-11-26 00:47:45,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:45,593 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:47:45,593 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 28 treesize of output 34 [2022-11-26 00:47:45,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:45,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:47:45,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:45,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:47:45,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 00:47:45,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:47:45,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:47:45,959 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 19 [2022-11-26 00:47:45,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:45,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:45,985 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:45,986 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:46,007 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:46,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:46,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:46,029 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:46,030 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:46,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:46,154 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:46,155 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:46,175 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:46,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:46,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:47:46,195 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 19 [2022-11-26 00:47:46,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:46,219 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:46,219 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:46,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,396 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:46,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:46,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:46,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:46,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:46,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:46,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:46,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,497 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:46,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:46,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:46,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:46,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:46,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:46,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:46,668 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 [2022-11-26 00:47:46,674 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 [2022-11-26 00:47:46,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:47:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,707 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:47:46,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:47:46,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:46,740 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 18 for LOIs [2022-11-26 00:47:46,746 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 [2022-11-26 00:47:46,751 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 [2022-11-26 00:47:46,764 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 [2022-11-26 00:47:46,769 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 [2022-11-26 00:47:46,776 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 [2022-11-26 00:47:46,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,791 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 [2022-11-26 00:47:46,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,798 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 [2022-11-26 00:47:46,806 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 [2022-11-26 00:47:46,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,821 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 36 treesize of output 23 [2022-11-26 00:47:46,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:46,831 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 36 treesize of output 23 [2022-11-26 00:47:46,840 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 [2022-11-26 00:47:46,842 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:47:53,394 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5551#(and (= |ULTIMATE.start_dll_circular_prepend_~data#1| |ULTIMATE.start_dll_circular_prepend_#in~data#1|) (= |ULTIMATE.start_dll_circular_prepend_#t~mem11#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) |ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (= (select |#valid| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 1) (= |ULTIMATE.start_dll_circular_prepend_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (not (= (select |#valid| |ULTIMATE.start_dll_circular_prepend_#t~mem11#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 4) 0) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 0) 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_prepend_~data#1| (select (select |#memory_int| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 8)) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= (+ |ULTIMATE.start_dll_circular_prepend_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_prepend_~head#1.base|)) (= (select |#length| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 12) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 0) (= |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset| |ULTIMATE.start_dll_circular_prepend_~head#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 4) 0) (not (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| 0)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_prepend_#t~mem11#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) |ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) |ULTIMATE.start_dll_circular_prepend_~head#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) |ULTIMATE.start_dll_circular_prepend_~head#1.offset|) 0))) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) 1) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (= |ULTIMATE.start_dll_circular_prepend_~head#1.base| |ULTIMATE.start_dll_circular_prepend_#in~head#1.base|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| |ULTIMATE.start_dll_circular_prepend_#in~data#1|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 0)) (= |#NULL.base| 0))' at error location [2022-11-26 00:47:53,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:47:53,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:47:53,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-11-26 00:47:53,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915602334] [2022-11-26 00:47:53,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:47:53,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:47:53,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:47:53,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:47:53,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1954, Unknown=2, NotChecked=90, Total=2256 [2022-11-26 00:47:53,397 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 24 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 21 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 00:47:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:54,294 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2022-11-26 00:47:54,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:47:54,294 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 21 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2022-11-26 00:47:54,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:54,295 INFO L225 Difference]: With dead ends: 107 [2022-11-26 00:47:54,295 INFO L226 Difference]: Without dead ends: 107 [2022-11-26 00:47:54,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=268, Invalid=2488, Unknown=4, NotChecked=102, Total=2862 [2022-11-26 00:47:54,297 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 380 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 16 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:54,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 394 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 714 Invalid, 3 Unknown, 108 Unchecked, 0.7s Time] [2022-11-26 00:47:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-26 00:47:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 90. [2022-11-26 00:47:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.5) internal successors, (90), 84 states have internal predecessors, (90), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:47:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2022-11-26 00:47:54,301 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 37 [2022-11-26 00:47:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:54,302 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2022-11-26 00:47:54,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 21 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 00:47:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2022-11-26 00:47:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:47:54,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:54,303 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:54,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:54,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:54,509 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:47:54,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:54,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1991781279, now seen corresponding path program 1 times [2022-11-26 00:47:54,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:47:54,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238025047] [2022-11-26 00:47:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:54,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:47:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:47:56,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:47:56,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238025047] [2022-11-26 00:47:56,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238025047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:56,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617666367] [2022-11-26 00:47:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:47:56,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:56,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:56,009 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:56,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:47:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:47:56,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-26 00:47:56,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:56,276 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 [2022-11-26 00:47:56,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-26 00:47:56,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-26 00:47:56,709 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_1815 (Array Int Int)) (v_ArrVal_1814 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1814)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1815)))) is different from true [2022-11-26 00:47:56,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,724 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 31 treesize of output 31 [2022-11-26 00:47:56,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,733 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 24 treesize of output 19 [2022-11-26 00:47:56,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:56,739 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 31 treesize of output 31 [2022-11-26 00:47:56,747 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-26 00:47:56,747 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 [2022-11-26 00:47:56,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-26 00:47:56,821 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 28 treesize of output 16 [2022-11-26 00:47:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-26 00:47:56,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:57,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617666367] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:47:57,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [103040034] [2022-11-26 00:47:57,159 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 00:47:57,159 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:47:57,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:47:57,160 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:47:57,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:47:57,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,182 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 [2022-11-26 00:47:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:57,215 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 [2022-11-26 00:47:57,219 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 [2022-11-26 00:47:57,226 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 [2022-11-26 00:47:57,230 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 [2022-11-26 00:47:57,238 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 [2022-11-26 00:47:57,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,247 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 [2022-11-26 00:47:57,253 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 [2022-11-26 00:47:57,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,259 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 [2022-11-26 00:47:57,269 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 [2022-11-26 00:47:57,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-26 00:47:57,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,286 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 36 treesize of output 23 [2022-11-26 00:47:57,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:47:57,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:57,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:47:57,529 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:47:57,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:47:57,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-26 00:47:57,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:57,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-26 00:47:57,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-26 00:47:57,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:47:57,688 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:57,690 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:57,691 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:57,694 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:57,766 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:47:57,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:47:57,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:47:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-26 00:47:57,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:57,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-26 00:47:57,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-26 00:47:57,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:57,922 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:57,925 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:57,926 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:57,928 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:57,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:47:57,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:47:58,003 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 11 [2022-11-26 00:47:58,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:58,044 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:47:58,044 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 28 treesize of output 30 [2022-11-26 00:47:58,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:58,072 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:47:58,072 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 28 treesize of output 34 [2022-11-26 00:47:58,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,099 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 [2022-11-26 00:47:58,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:58,147 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:47:58,147 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 28 treesize of output 30 [2022-11-26 00:47:58,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:58,180 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:47:58,180 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 28 treesize of output 34 [2022-11-26 00:47:58,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,196 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 [2022-11-26 00:47:58,271 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 [2022-11-26 00:47:58,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:47:58,286 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 [2022-11-26 00:47:58,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:47:58,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:47:58,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 00:47:58,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:47:58,469 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 19 [2022-11-26 00:47:58,495 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:58,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:58,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:58,516 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:58,516 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:58,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:58,540 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:58,540 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:58,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:58,662 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:58,662 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:58,679 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:58,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:58,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:47:58,706 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 19 [2022-11-26 00:47:58,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:58,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:47:58,732 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:47:58,732 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:47:58,907 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:47:58,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:47:59,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:59,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:59,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-26 00:47:59,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:59,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-26 00:47:59,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:47:59,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-26 00:47:59,133 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:59,134 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:59,136 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:59,138 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:59,191 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:47:59,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:47:59,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:59,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:47:59,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:59,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:47:59,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:47:59,434 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:59,436 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:59,438 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:47:59,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:47:59,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:47:59,543 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 [2022-11-26 00:47:59,593 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-26 00:47:59,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 229 [2022-11-26 00:47:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:59,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:59,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:47:59,783 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 21 for LOIs [2022-11-26 00:47:59,790 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 [2022-11-26 00:47:59,795 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 [2022-11-26 00:47:59,809 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 [2022-11-26 00:47:59,814 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 [2022-11-26 00:47:59,821 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 [2022-11-26 00:47:59,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:59,834 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 [2022-11-26 00:47:59,841 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 19 treesize of output 1 [2022-11-26 00:47:59,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:59,850 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 [2022-11-26 00:47:59,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:59,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:59,867 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 36 treesize of output 23 [2022-11-26 00:47:59,873 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 [2022-11-26 00:47:59,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:59,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:47:59,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-26 00:47:59,887 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:48:04,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5938#(and (<= |ULTIMATE.start_dll_circular_prepend_#in~data#1| 5) (= |ULTIMATE.start_dll_circular_prepend_#t~mem11#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) |ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (<= 5 |ULTIMATE.start_dll_circular_prepend_#in~data#1|) (<= 0 |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_dll_circular_prepend_#in~head#1.base|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset| 0) (<= (+ |ULTIMATE.start_dll_circular_prepend_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_prepend_~head#1.base|)) (<= |ULTIMATE.start_dll_circular_prepend_~head#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_prepend_~head#1.base|) (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 0) (<= |ULTIMATE.start_dll_circular_prepend_~data#1| 5) (<= 0 |ULTIMATE.start_dll_circular_prepend_~head#1.offset|) (<= 5 |ULTIMATE.start_dll_circular_prepend_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_prepend_#t~mem11#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) |ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) |ULTIMATE.start_dll_circular_prepend_~head#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) |ULTIMATE.start_dll_circular_prepend_~head#1.offset|) 0))) (or (not (<= 0 (+ |ULTIMATE.start_dll_circular_prepend_#t~mem11#1.offset| 4))) (not (<= (+ |ULTIMATE.start_dll_circular_prepend_#t~mem11#1.offset| 8) (select |#length| |ULTIMATE.start_dll_circular_prepend_#t~mem11#1.base|)))) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) 1) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-26 00:48:04,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:48:04,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:48:04,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2022-11-26 00:48:04,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283011892] [2022-11-26 00:48:04,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:48:04,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:48:04,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:04,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:48:04,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2343, Unknown=1, NotChecked=98, Total=2652 [2022-11-26 00:48:04,933 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 26 states, 19 states have (on average 2.789473684210526) internal successors, (53), 23 states have internal predecessors, (53), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 00:48:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:06,381 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2022-11-26 00:48:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:48:06,382 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 19 states have (on average 2.789473684210526) internal successors, (53), 23 states have internal predecessors, (53), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2022-11-26 00:48:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:06,383 INFO L225 Difference]: With dead ends: 89 [2022-11-26 00:48:06,383 INFO L226 Difference]: Without dead ends: 89 [2022-11-26 00:48:06,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=295, Invalid=3248, Unknown=1, NotChecked=116, Total=3660 [2022-11-26 00:48:06,384 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 89 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:06,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 607 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1022 Invalid, 0 Unknown, 89 Unchecked, 0.9s Time] [2022-11-26 00:48:06,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-26 00:48:06,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-26 00:48:06,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 83 states have internal predecessors, (89), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:48:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2022-11-26 00:48:06,388 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 37 [2022-11-26 00:48:06,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:06,388 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2022-11-26 00:48:06,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 19 states have (on average 2.789473684210526) internal successors, (53), 23 states have internal predecessors, (53), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 00:48:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2022-11-26 00:48:06,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:48:06,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:06,389 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:06,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:06,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:06,595 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:48:06,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1747229047, now seen corresponding path program 1 times [2022-11-26 00:48:06,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:06,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924226308] [2022-11-26 00:48:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:06,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:48:07,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:07,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924226308] [2022-11-26 00:48:07,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924226308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:07,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891972508] [2022-11-26 00:48:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:07,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:07,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:07,156 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:07,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:48:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:07,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:48:07,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:07,629 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 8 treesize of output 4 [2022-11-26 00:48:07,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:07,730 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 [2022-11-26 00:48:07,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-26 00:48:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:48:07,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:07,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891972508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:07,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1296165715] [2022-11-26 00:48:07,934 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-26 00:48:07,934 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:48:07,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:48:07,934 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:48:07,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:48:07,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:07,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:07,960 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 [2022-11-26 00:48:07,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:07,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:07,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:48:07,993 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 [2022-11-26 00:48:07,997 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 [2022-11-26 00:48:08,003 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 [2022-11-26 00:48:08,007 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 [2022-11-26 00:48:08,013 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 [2022-11-26 00:48:08,020 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 [2022-11-26 00:48:08,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,026 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 [2022-11-26 00:48:08,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,033 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 [2022-11-26 00:48:08,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,046 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 36 treesize of output 23 [2022-11-26 00:48:08,052 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 [2022-11-26 00:48:08,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,062 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 36 treesize of output 23 [2022-11-26 00:48:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:48:08,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:48:08,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:48:08,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,216 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:08,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:08,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:08,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:48:08,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:08,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:08,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:08,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,308 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:08,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:08,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:08,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:08,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:08,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:08,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:48:08,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:08,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,480 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 278 treesize of output 262 [2022-11-26 00:48:08,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:08,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:08,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-26 00:48:08,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:08,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:08,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-26 00:48:08,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,638 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 260 treesize of output 238 [2022-11-26 00:48:08,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:08,668 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:48:08,670 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 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-26 00:48:08,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:08,698 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 00:48:08,699 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 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-26 00:48:08,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,814 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 260 treesize of output 238 [2022-11-26 00:48:08,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:08,841 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 00:48:08,841 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 1 case distinctions, treesize of input 261 treesize of output 257 [2022-11-26 00:48:08,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:08,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:08,873 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:48:08,873 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 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-26 00:48:09,057 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 [2022-11-26 00:48:09,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:48:09,078 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 [2022-11-26 00:48:09,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 00:48:09,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:48:09,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:48:09,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:09,262 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:09,262 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:48:09,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:09,283 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:09,283 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:48:09,298 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:09,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:48:09,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:09,317 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 19 [2022-11-26 00:48:09,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:09,412 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 19 [2022-11-26 00:48:09,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:09,443 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:09,443 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:48:09,460 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:09,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:48:09,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:09,483 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:09,484 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:48:09,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,620 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 216 treesize of output 200 [2022-11-26 00:48:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:09,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,652 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-26 00:48:09,652 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 219 treesize of output 213 [2022-11-26 00:48:09,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:09,684 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:48:09,684 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 211 treesize of output 201 [2022-11-26 00:48:09,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:09,810 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 386 treesize of output 362 [2022-11-26 00:48:09,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:09,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:09,841 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-26 00:48:09,842 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 389 treesize of output 363 [2022-11-26 00:48:09,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:09,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:09,887 INFO L321 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2022-11-26 00:48:09,888 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 373 treesize of output 363 [2022-11-26 00:48:10,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 356 treesize of output 328 [2022-11-26 00:48:10,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:10,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:10,097 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:10,097 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 2 case distinctions, treesize of input 364 treesize of output 350 [2022-11-26 00:48:10,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:10,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:10,123 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:10,124 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 2 case distinctions, treesize of input 348 treesize of output 334 [2022-11-26 00:48:10,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,328 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:10,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:10,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:10,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:10,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:10,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:10,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:48:10,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,423 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:10,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:10,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:10,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:10,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:48:10,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:10,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:10,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:48:10,588 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 [2022-11-26 00:48:10,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:48:10,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,622 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:10,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:10,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:48:10,657 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 13 for LOIs [2022-11-26 00:48:10,663 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 [2022-11-26 00:48:10,667 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 [2022-11-26 00:48:10,678 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 [2022-11-26 00:48:10,683 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 [2022-11-26 00:48:10,687 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 [2022-11-26 00:48:10,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:48:10,703 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 [2022-11-26 00:48:10,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,709 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 [2022-11-26 00:48:10,720 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 [2022-11-26 00:48:10,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,728 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 36 treesize of output 23 [2022-11-26 00:48:10,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:10,738 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 36 treesize of output 23 [2022-11-26 00:48:10,741 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:48:18,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1296165715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:18,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:48:18,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [15, 16] total 49 [2022-11-26 00:48:18,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810193429] [2022-11-26 00:48:18,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:18,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:48:18,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:18,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:48:18,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2329, Unknown=2, NotChecked=0, Total=2550 [2022-11-26 00:48:18,603 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:48:20,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:20,494 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2022-11-26 00:48:20,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 00:48:20,494 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2022-11-26 00:48:20,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:20,495 INFO L225 Difference]: With dead ends: 124 [2022-11-26 00:48:20,495 INFO L226 Difference]: Without dead ends: 124 [2022-11-26 00:48:20,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=219, Invalid=2329, Unknown=2, NotChecked=0, Total=2550 [2022-11-26 00:48:20,496 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 231 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:20,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 215 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-26 00:48:20,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-26 00:48:20,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 99. [2022-11-26 00:48:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 70 states have (on average 1.457142857142857) internal successors, (102), 93 states have internal predecessors, (102), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:48:20,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2022-11-26 00:48:20,501 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 41 [2022-11-26 00:48:20,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:20,501 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2022-11-26 00:48:20,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:48:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2022-11-26 00:48:20,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:48:20,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:20,502 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:20,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-26 00:48:20,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:20,707 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:48:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:20,708 INFO L85 PathProgramCache]: Analyzing trace with hash -901892317, now seen corresponding path program 1 times [2022-11-26 00:48:20,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:20,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191036146] [2022-11-26 00:48:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:20,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 00:48:20,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:20,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191036146] [2022-11-26 00:48:20,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191036146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:20,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:48:20,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:48:20,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309941200] [2022-11-26 00:48:20,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:20,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:48:20,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:48:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:48:20,815 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:48:20,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:20,992 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2022-11-26 00:48:20,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:48:20,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2022-11-26 00:48:20,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:20,993 INFO L225 Difference]: With dead ends: 123 [2022-11-26 00:48:20,993 INFO L226 Difference]: Without dead ends: 123 [2022-11-26 00:48:20,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:48:20,994 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 52 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:20,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 264 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:48:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-26 00:48:20,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2022-11-26 00:48:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 70 states have (on average 1.4428571428571428) internal successors, (101), 92 states have internal predecessors, (101), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:48:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2022-11-26 00:48:20,998 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 41 [2022-11-26 00:48:20,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:20,998 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2022-11-26 00:48:20,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:48:20,998 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2022-11-26 00:48:20,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:48:20,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:20,999 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:20,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-26 00:48:20,999 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:48:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:21,000 INFO L85 PathProgramCache]: Analyzing trace with hash -901892316, now seen corresponding path program 1 times [2022-11-26 00:48:21,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:21,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737146619] [2022-11-26 00:48:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:21,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 00:48:21,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:21,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737146619] [2022-11-26 00:48:21,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737146619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:48:21,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:48:21,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:48:21,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156995987] [2022-11-26 00:48:21,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:48:21,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:48:21,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:48:21,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:48:21,191 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:48:21,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:21,358 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2022-11-26 00:48:21,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:48:21,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2022-11-26 00:48:21,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:21,362 INFO L225 Difference]: With dead ends: 124 [2022-11-26 00:48:21,362 INFO L226 Difference]: Without dead ends: 124 [2022-11-26 00:48:21,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:48:21,362 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 55 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:21,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 294 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:48:21,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-26 00:48:21,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2022-11-26 00:48:21,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 91 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:48:21,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2022-11-26 00:48:21,366 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 41 [2022-11-26 00:48:21,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:21,366 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2022-11-26 00:48:21,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-26 00:48:21,366 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2022-11-26 00:48:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:48:21,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:21,367 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:21,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-26 00:48:21,368 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:48:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2106109295, now seen corresponding path program 1 times [2022-11-26 00:48:21,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:21,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922346698] [2022-11-26 00:48:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:21,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:48:23,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:23,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922346698] [2022-11-26 00:48:23,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922346698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:23,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8313625] [2022-11-26 00:48:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:23,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:23,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:23,160 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:23,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:48:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:23,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-26 00:48:23,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:23,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:48:23,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:23,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 14 [2022-11-26 00:48:23,788 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 7 treesize of output 3 [2022-11-26 00:48:24,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:24,032 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 00:48:24,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2022-11-26 00:48:24,065 INFO L321 Elim1Store]: treesize reduction 96, result has 30.9 percent of original size [2022-11-26 00:48:24,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 52 [2022-11-26 00:48:24,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:24,080 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 14 treesize of output 16 [2022-11-26 00:48:24,267 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 [2022-11-26 00:48:24,410 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:24,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 25 [2022-11-26 00:48:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:48:24,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:24,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8313625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:24,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [744507302] [2022-11-26 00:48:24,898 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-11-26 00:48:24,898 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:48:24,898 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:48:24,899 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:48:24,899 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:48:24,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:24,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:24,919 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 [2022-11-26 00:48:24,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:24,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:24,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:48:24,952 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 [2022-11-26 00:48:24,956 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 [2022-11-26 00:48:24,961 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 [2022-11-26 00:48:24,966 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 [2022-11-26 00:48:24,970 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 [2022-11-26 00:48:24,976 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 [2022-11-26 00:48:24,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:24,982 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 [2022-11-26 00:48:24,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:24,988 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 [2022-11-26 00:48:24,996 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 [2022-11-26 00:48:25,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,003 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 36 treesize of output 23 [2022-11-26 00:48:25,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,011 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 36 treesize of output 23 [2022-11-26 00:48:25,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:48:25,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:48:25,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:48:25,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,137 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:25,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:25,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:25,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:25,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:48:25,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:25,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:25,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,228 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:25,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:25,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:25,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:25,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:48:25,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:25,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:25,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:48:25,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:48:25,357 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 11 [2022-11-26 00:48:25,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,388 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 [2022-11-26 00:48:25,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:25,412 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:48:25,412 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 28 treesize of output 34 [2022-11-26 00:48:25,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:25,442 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:48:25,443 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 28 treesize of output 30 [2022-11-26 00:48:25,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:25,500 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:48:25,500 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 28 treesize of output 34 [2022-11-26 00:48:25,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:25,525 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:48:25,525 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 28 treesize of output 30 [2022-11-26 00:48:25,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,541 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 [2022-11-26 00:48:25,605 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 [2022-11-26 00:48:25,618 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 [2022-11-26 00:48:25,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:48:25,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:48:25,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:48:25,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 00:48:25,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:25,762 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:25,762 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:48:25,779 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:25,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:48:25,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:25,800 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:25,801 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:48:25,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:25,826 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 19 [2022-11-26 00:48:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:25,908 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:25,908 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:48:25,925 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:25,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:48:25,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:25,945 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 19 [2022-11-26 00:48:25,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:25,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:25,997 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:25,998 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:48:26,166 INFO L321 Elim1Store]: treesize reduction 28, result has 62.2 percent of original size [2022-11-26 00:48:26,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 104 [2022-11-26 00:48:26,215 INFO L321 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2022-11-26 00:48:26,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 100 [2022-11-26 00:48:26,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:48:26,257 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:48:26,264 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:48:26,493 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 [2022-11-26 00:48:26,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:48:26,516 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 [2022-11-26 00:48:26,716 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-26 00:48:26,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:48:26,753 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:48:26,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-26 00:48:26,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 00:48:26,847 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:48:26,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:26,944 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:26,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:26,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:48:26,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:26,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:27,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:27,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:27,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:27,036 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:27,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:27,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:27,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:27,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:48:27,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:27,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:27,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:48:27,189 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 [2022-11-26 00:48:27,196 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 [2022-11-26 00:48:27,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:27,217 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:27,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:27,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:27,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:27,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:48:27,256 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2022-11-26 00:48:27,261 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 [2022-11-26 00:48:27,265 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 [2022-11-26 00:48:27,274 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 [2022-11-26 00:48:27,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:48:27,291 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 [2022-11-26 00:48:27,300 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 [2022-11-26 00:48:27,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:27,307 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 [2022-11-26 00:48:27,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:27,314 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 [2022-11-26 00:48:27,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:27,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:27,330 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 36 treesize of output 23 [2022-11-26 00:48:27,336 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 [2022-11-26 00:48:27,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:27,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:27,344 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 36 treesize of output 23 [2022-11-26 00:48:27,347 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:48:36,652 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7233#(and (<= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_dll_circular_prepend_#in~data#1| 5) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base|) (+ 4 |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset|)) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 5 |ULTIMATE.start_dll_circular_prepend_#in~data#1|) (<= 5 |ULTIMATE.start_main_~uneq~0#1|) (= (select |#valid| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 1) (<= 0 |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 0 (+ 4 |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset|)) (<= 0 |ULTIMATE.start_dll_circular_prepend_#in~head#1.base|) (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base|) (+ 4 |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset|))) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset| 0) (<= |ULTIMATE.start_dll_circular_prepend_~head#1.offset| 0) (<= (+ |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)) (<= 0 |ULTIMATE.start_dll_circular_prepend_~head#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 0) (<= |ULTIMATE.start_dll_circular_prepend_~data#1| 5) (= (select |#valid| |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base|) 1) (<= 0 |ULTIMATE.start_dll_circular_prepend_~head#1.offset|) (not (= (select |#valid| |ULTIMATE.start_dll_circular_prepend_~last~1#1.base|) 1)) (<= 5 |ULTIMATE.start_dll_circular_prepend_~data#1|) (or (and (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base|) (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| (+ 4 |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset|))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|) |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset|)) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|) |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= (+ 8 |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset|) (select |#length| |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base|)) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|))' at error location [2022-11-26 00:48:36,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:48:36,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:48:36,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 34 [2022-11-26 00:48:36,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874680686] [2022-11-26 00:48:36,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:48:36,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 00:48:36,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:36,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 00:48:36,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=4234, Unknown=1, NotChecked=0, Total=4556 [2022-11-26 00:48:36,656 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 35 states, 28 states have (on average 2.25) internal successors, (63), 31 states have internal predecessors, (63), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 00:48:39,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:39,319 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2022-11-26 00:48:39,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:48:39,319 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 28 states have (on average 2.25) internal successors, (63), 31 states have internal predecessors, (63), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2022-11-26 00:48:39,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:39,320 INFO L225 Difference]: With dead ends: 138 [2022-11-26 00:48:39,320 INFO L226 Difference]: Without dead ends: 138 [2022-11-26 00:48:39,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=533, Invalid=6272, Unknown=1, NotChecked=0, Total=6806 [2022-11-26 00:48:39,322 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 505 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:39,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 994 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 00:48:39,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-26 00:48:39,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2022-11-26 00:48:39,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 90 states have internal predecessors, (99), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:48:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2022-11-26 00:48:39,325 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 42 [2022-11-26 00:48:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:39,325 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2022-11-26 00:48:39,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 28 states have (on average 2.25) internal successors, (63), 31 states have internal predecessors, (63), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 00:48:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2022-11-26 00:48:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:48:39,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:39,327 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:39,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:39,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:39,533 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:48:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:39,534 INFO L85 PathProgramCache]: Analyzing trace with hash 2106109296, now seen corresponding path program 1 times [2022-11-26 00:48:39,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:48:39,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915057370] [2022-11-26 00:48:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:39,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:48:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:48:42,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:48:42,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915057370] [2022-11-26 00:48:42,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915057370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:42,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835586498] [2022-11-26 00:48:42,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:48:42,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:42,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:42,083 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:42,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:48:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:48:42,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-26 00:48:42,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:42,410 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 [2022-11-26 00:48:42,723 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:48:42,723 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 [2022-11-26 00:48:42,738 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:42,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 00:48:43,106 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 25 treesize of output 17 [2022-11-26 00:48:43,119 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 25 treesize of output 17 [2022-11-26 00:48:43,222 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-26 00:48:43,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 49 [2022-11-26 00:48:43,246 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-26 00:48:43,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2022-11-26 00:48:43,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:43,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:48:43,526 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_2690 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2690))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_2691 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2691))) (exists ((v_ArrVal_2685 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_2685))))) is different from true [2022-11-26 00:48:43,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:43,560 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 00:48:43,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 98 [2022-11-26 00:48:43,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:43,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:43,575 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:48:43,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 92 [2022-11-26 00:48:43,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:43,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-26 00:48:43,615 INFO L321 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2022-11-26 00:48:43,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 00:48:43,818 INFO L321 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-26 00:48:43,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 61 [2022-11-26 00:48:43,914 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-26 00:48:43,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2022-11-26 00:48:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-26 00:48:43,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:44,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835586498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:48:44,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2105464881] [2022-11-26 00:48:44,421 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-11-26 00:48:44,422 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:48:44,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:48:44,422 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:48:44,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:48:44,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,444 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 [2022-11-26 00:48:44,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:48:44,477 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 [2022-11-26 00:48:44,480 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 [2022-11-26 00:48:44,486 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 [2022-11-26 00:48:44,490 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 [2022-11-26 00:48:44,494 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 [2022-11-26 00:48:44,500 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 [2022-11-26 00:48:44,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,505 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 [2022-11-26 00:48:44,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,511 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 [2022-11-26 00:48:44,519 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 [2022-11-26 00:48:44,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,526 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 36 treesize of output 23 [2022-11-26 00:48:44,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,539 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 36 treesize of output 23 [2022-11-26 00:48:44,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:48:44,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:48:44,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:48:44,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,666 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:44,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:44,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:44,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:48:44,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:44,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:44,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:44,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,755 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:44,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:44,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:44,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:44,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:44,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:48:44,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:44,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:48:44,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-26 00:48:44,904 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 11 [2022-11-26 00:48:44,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:44,933 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 [2022-11-26 00:48:44,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:44,959 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:48:44,960 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 28 treesize of output 34 [2022-11-26 00:48:44,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:44,985 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:48:44,986 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 28 treesize of output 30 [2022-11-26 00:48:45,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:45,036 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:48:45,036 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 28 treesize of output 30 [2022-11-26 00:48:45,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:45,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:45,067 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:48:45,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-26 00:48:45,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:45,083 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 [2022-11-26 00:48:45,134 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 [2022-11-26 00:48:45,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:48:45,151 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 [2022-11-26 00:48:45,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 00:48:45,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:45,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:48:45,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:45,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:48:45,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:45,291 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 19 [2022-11-26 00:48:45,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:45,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:45,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:45,323 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:45,323 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:48:45,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:45,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:45,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:45,344 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:45,344 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:48:45,360 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:45,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:48:45,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:45,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:45,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:45,434 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:45,435 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:48:45,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:48:45,456 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 19 [2022-11-26 00:48:45,483 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:45,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:48:45,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:45,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:45,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:45,530 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:48:45,530 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:48:45,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:45,820 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 216 treesize of output 200 [2022-11-26 00:48:45,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:48:45,898 INFO L321 Elim1Store]: treesize reduction 76, result has 40.2 percent of original size [2022-11-26 00:48:45,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 294 treesize of output 302 [2022-11-26 00:48:45,969 INFO L321 Elim1Store]: treesize reduction 46, result has 42.5 percent of original size [2022-11-26 00:48:45,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 310 treesize of output 302 [2022-11-26 00:48:46,024 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:48:46,027 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:48:46,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:48:46,248 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 [2022-11-26 00:48:46,259 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 [2022-11-26 00:48:46,382 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-26 00:48:46,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:48:46,508 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:48:46,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-26 00:48:46,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 00:48:46,708 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-26 00:48:46,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:46,815 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:46,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:46,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:46,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:46,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:48:46,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:46,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:46,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:46,911 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:46,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:46,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:46,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:46,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:48:46,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:48:46,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:48:47,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:48:47,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:48:47,082 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 [2022-11-26 00:48:47,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:47,108 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:48:47,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:48:47,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:47,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:47,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:48:47,153 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 13 for LOIs [2022-11-26 00:48:47,159 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 [2022-11-26 00:48:47,163 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 [2022-11-26 00:48:47,175 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 [2022-11-26 00:48:47,181 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 [2022-11-26 00:48:47,187 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 [2022-11-26 00:48:47,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:47,198 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 [2022-11-26 00:48:47,204 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 [2022-11-26 00:48:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:47,209 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 [2022-11-26 00:48:47,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:47,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:47,223 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 36 treesize of output 23 [2022-11-26 00:48:47,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:47,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:48:47,232 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 36 treesize of output 23 [2022-11-26 00:48:47,238 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 [2022-11-26 00:48:47,240 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:48:57,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7727#(and (<= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_dll_circular_prepend_#in~data#1| 5) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= 5 |ULTIMATE.start_dll_circular_prepend_#in~data#1|) (<= 5 |ULTIMATE.start_main_~uneq~0#1|) (<= 0 |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= 0 (+ 4 |ULTIMATE.start_dll_circular_prepend_~old_head~0#1.offset|)) (<= 0 |ULTIMATE.start_dll_circular_prepend_#in~head#1.base|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset| 0) (<= |ULTIMATE.start_dll_circular_prepend_~head#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_prepend_~head#1.base|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 0) (<= |ULTIMATE.start_dll_circular_prepend_~data#1| 5) (<= 0 |ULTIMATE.start_dll_circular_prepend_~head#1.offset|) (<= 5 |ULTIMATE.start_dll_circular_prepend_~data#1|) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= 0 |#NULL.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|))' at error location [2022-11-26 00:48:57,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:48:57,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:48:57,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 41 [2022-11-26 00:48:57,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447088692] [2022-11-26 00:48:57,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:48:57,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:48:57,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:48:57,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:48:57,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=4811, Unknown=2, NotChecked=140, Total=5256 [2022-11-26 00:48:57,604 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 42 states, 31 states have (on average 2.225806451612903) internal successors, (69), 35 states have internal predecessors, (69), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:49:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:00,652 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2022-11-26 00:49:00,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:49:00,653 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 31 states have (on average 2.225806451612903) internal successors, (69), 35 states have internal predecessors, (69), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2022-11-26 00:49:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:00,654 INFO L225 Difference]: With dead ends: 122 [2022-11-26 00:49:00,654 INFO L226 Difference]: Without dead ends: 122 [2022-11-26 00:49:00,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2304 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=445, Invalid=6697, Unknown=2, NotChecked=166, Total=7310 [2022-11-26 00:49:00,656 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 146 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:00,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1389 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2090 Invalid, 0 Unknown, 125 Unchecked, 1.9s Time] [2022-11-26 00:49:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-26 00:49:00,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 95. [2022-11-26 00:49:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 70 states have (on average 1.4) internal successors, (98), 89 states have internal predecessors, (98), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:49:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2022-11-26 00:49:00,660 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 42 [2022-11-26 00:49:00,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:00,661 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2022-11-26 00:49:00,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 31 states have (on average 2.225806451612903) internal successors, (69), 35 states have internal predecessors, (69), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:49:00,661 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2022-11-26 00:49:00,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-26 00:49:00,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:00,662 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:49:00,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-26 00:49:00,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:00,868 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:49:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:00,869 INFO L85 PathProgramCache]: Analyzing trace with hash -245096343, now seen corresponding path program 1 times [2022-11-26 00:49:00,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:00,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919852362] [2022-11-26 00:49:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:00,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:49:01,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:01,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919852362] [2022-11-26 00:49:01,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919852362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:49:01,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694415199] [2022-11-26 00:49:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:01,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:01,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:49:01,409 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:49:01,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:49:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:01,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:49:01,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:01,979 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 8 treesize of output 4 [2022-11-26 00:49:02,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,103 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 15 treesize of output 17 [2022-11-26 00:49:02,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-26 00:49:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:49:02,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:49:02,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694415199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:49:02,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501168315] [2022-11-26 00:49:02,331 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-26 00:49:02,331 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:49:02,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:49:02,332 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:49:02,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:49:02,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,377 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 [2022-11-26 00:49:02,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:49:02,418 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 [2022-11-26 00:49:02,431 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 [2022-11-26 00:49:02,439 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 [2022-11-26 00:49:02,443 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 [2022-11-26 00:49:02,447 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 [2022-11-26 00:49:02,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,456 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 [2022-11-26 00:49:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,464 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 [2022-11-26 00:49:02,470 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 [2022-11-26 00:49:02,478 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 [2022-11-26 00:49:02,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,488 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 36 treesize of output 23 [2022-11-26 00:49:02,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,499 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 36 treesize of output 23 [2022-11-26 00:49:02,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:49:02,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:49:02,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-26 00:49:02,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,648 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:49:02,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:49:02,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:49:02,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:49:02,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:49:02,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:49:02,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:49:02,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,752 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:49:02,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:49:02,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:49:02,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:49:02,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:49:02,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:49:02,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:49:02,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:02,905 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 278 treesize of output 262 [2022-11-26 00:49:02,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:02,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:02,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 263 [2022-11-26 00:49:02,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:02,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:02,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:02,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 257 [2022-11-26 00:49:03,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:03,037 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 260 treesize of output 238 [2022-11-26 00:49:03,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:03,069 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:49:03,069 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 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-26 00:49:03,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:03,098 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 00:49:03,098 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 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-26 00:49:03,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:03,287 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 260 treesize of output 238 [2022-11-26 00:49:03,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:03,331 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:49:03,331 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 1 case distinctions, treesize of input 261 treesize of output 261 [2022-11-26 00:49:03,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:03,361 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-26 00:49:03,361 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 1 case distinctions, treesize of input 249 treesize of output 245 [2022-11-26 00:49:03,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:49:03,531 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 [2022-11-26 00:49:03,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:49:03,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:03,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:49:03,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:03,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:49:03,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 00:49:03,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:49:03,709 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 19 [2022-11-26 00:49:03,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:03,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:03,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:03,740 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:49:03,740 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:49:03,768 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:49:03,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:49:03,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:03,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:03,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:03,792 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:49:03,793 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:49:03,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:03,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:03,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:03,897 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:49:03,898 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:49:03,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:49:03,917 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 19 [2022-11-26 00:49:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:03,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:03,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:03,944 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:49:03,945 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 10 [2022-11-26 00:49:03,971 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:49:03,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:49:04,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:49:04,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:49:04,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:49:04,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:04,135 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:49:04,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:49:04,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:49:04,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:04,188 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:49:04,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:49:04,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-26 00:49:04,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:04,247 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:49:04,248 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 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-26 00:49:04,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:04,274 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:49:04,275 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-26 00:49:04,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,411 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:49:04,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:49:04,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:49:04,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:49:04,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:49:04,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:49:04,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:49:04,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,516 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:49:04,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:49:04,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:49:04,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:49:04,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:49:04,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 00:49:04,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:49:04,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:49:04,717 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 [2022-11-26 00:49:04,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-26 00:49:04,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,753 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 00:49:04,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-26 00:49:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-26 00:49:04,800 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 8 for LOIs [2022-11-26 00:49:04,807 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 [2022-11-26 00:49:04,812 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 [2022-11-26 00:49:04,823 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 [2022-11-26 00:49:04,828 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 [2022-11-26 00:49:04,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:49:04,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,846 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 [2022-11-26 00:49:04,854 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 [2022-11-26 00:49:04,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,861 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 [2022-11-26 00:49:04,876 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 [2022-11-26 00:49:04,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,886 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 36 treesize of output 23 [2022-11-26 00:49:04,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:04,897 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 36 treesize of output 23 [2022-11-26 00:49:04,901 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:49:13,322 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8185#(and (<= |ULTIMATE.start_dll_circular_prepend_#in~data#1| 5) (<= (+ 8 |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|) (select |#length| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)) (<= 5 |ULTIMATE.start_dll_circular_prepend_#in~data#1|) (= (select |#valid| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) 1) (<= 0 |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|) (<= 2 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) |ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (= (select |#valid| |ULTIMATE.start_main_~ptr~0#1.base|) 1) (not (= |ULTIMATE.start_main_~uneq~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 8)))) (<= 0 |ULTIMATE.start_dll_circular_prepend_#in~head#1.base|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_main_~ptr~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (<= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_main_~ptr~0#1.offset|) (= |ULTIMATE.start_main_~uneq~0#1| 5) (<= |ULTIMATE.start_dll_circular_prepend_#in~head#1.offset| 0) (<= (+ |ULTIMATE.start_dll_circular_prepend_~head#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_prepend_~head#1.base|)) (<= |ULTIMATE.start_dll_circular_prepend_~head#1.offset| 0) (<= 0 |ULTIMATE.start_dll_circular_prepend_~head#1.base|) (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 0) (<= |ULTIMATE.start_dll_circular_prepend_~data#1| 5) (<= (+ |ULTIMATE.start_main_~#s~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#s~0#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (+ |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4)) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|) (<= 0 |ULTIMATE.start_dll_circular_prepend_~head#1.offset|) (<= (+ |ULTIMATE.start_main_~ptr~0#1.offset| 12) (select |#length| |ULTIMATE.start_main_~ptr~0#1.base|)) (<= 5 |ULTIMATE.start_dll_circular_prepend_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 1 |ULTIMATE.start_dll_circular_create_#in~data#1|) (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset|)) (= |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) |ULTIMATE.start_dll_circular_prepend_~head#1.offset|)) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_dll_circular_create_#res#1.offset|) (= |#NULL.offset| 0) (<= 1 |ULTIMATE.start_dll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (+ |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4)) |ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (<= |ULTIMATE.start_dll_circular_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_prepend_~head#1.base|) 1) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |ULTIMATE.start_dll_circular_create_~data#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_main_~ptr~0#1.offset| 8)))' at error location [2022-11-26 00:49:13,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:49:13,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:49:13,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2022-11-26 00:49:13,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007659354] [2022-11-26 00:49:13,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:49:13,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:49:13,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:13,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:49:13,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2491, Unknown=9, NotChecked=0, Total=2756 [2022-11-26 00:49:13,325 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 24 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 00:49:14,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:14,002 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2022-11-26 00:49:14,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:49:14,002 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2022-11-26 00:49:14,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:14,003 INFO L225 Difference]: With dead ends: 82 [2022-11-26 00:49:14,003 INFO L226 Difference]: Without dead ends: 82 [2022-11-26 00:49:14,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=337, Invalid=3194, Unknown=9, NotChecked=0, Total=3540 [2022-11-26 00:49:14,004 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 206 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:14,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 529 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:49:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-26 00:49:14,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-26 00:49:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 57 states have (on average 1.4210526315789473) internal successors, (81), 76 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:49:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2022-11-26 00:49:14,008 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 43 [2022-11-26 00:49:14,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:14,008 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2022-11-26 00:49:14,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.736842105263158) internal successors, (52), 20 states have internal predecessors, (52), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-26 00:49:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2022-11-26 00:49:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 00:49:14,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:14,009 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:49:14,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-26 00:49:14,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-26 00:49:14,217 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:49:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:14,217 INFO L85 PathProgramCache]: Analyzing trace with hash 94331479, now seen corresponding path program 1 times [2022-11-26 00:49:14,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:14,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142725752] [2022-11-26 00:49:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:14,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:49:15,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:15,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142725752] [2022-11-26 00:49:15,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142725752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:49:15,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:49:15,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-26 00:49:15,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883036656] [2022-11-26 00:49:15,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:49:15,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:49:15,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:15,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:49:15,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:49:15,612 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:49:16,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:16,610 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2022-11-26 00:49:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:49:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-11-26 00:49:16,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:16,611 INFO L225 Difference]: With dead ends: 98 [2022-11-26 00:49:16,612 INFO L226 Difference]: Without dead ends: 98 [2022-11-26 00:49:16,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:49:16,613 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 492 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:16,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 277 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:49:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-26 00:49:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2022-11-26 00:49:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.368421052631579) internal successors, (78), 73 states have internal predecessors, (78), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:49:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-11-26 00:49:16,617 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 46 [2022-11-26 00:49:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:16,617 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-11-26 00:49:16,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:49:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-11-26 00:49:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 00:49:16,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:16,618 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:49:16,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-26 00:49:16,619 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:49:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:16,619 INFO L85 PathProgramCache]: Analyzing trace with hash 94331480, now seen corresponding path program 1 times [2022-11-26 00:49:16,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:16,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034480081] [2022-11-26 00:49:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:16,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:49:18,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:18,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034480081] [2022-11-26 00:49:18,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034480081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:49:18,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:49:18,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-26 00:49:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299837696] [2022-11-26 00:49:18,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:49:18,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:49:18,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:49:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:49:18,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:49:18,482 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:49:19,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:19,404 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-11-26 00:49:19,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:49:19,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-11-26 00:49:19,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:19,405 INFO L225 Difference]: With dead ends: 79 [2022-11-26 00:49:19,406 INFO L226 Difference]: Without dead ends: 79 [2022-11-26 00:49:19,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:49:19,407 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 388 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:19,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 251 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:49:19,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-26 00:49:19,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-11-26 00:49:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.3333333333333333) internal successors, (76), 71 states have internal predecessors, (76), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-26 00:49:19,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2022-11-26 00:49:19,410 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 46 [2022-11-26 00:49:19,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:19,410 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2022-11-26 00:49:19,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-26 00:49:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2022-11-26 00:49:19,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-26 00:49:19,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:19,411 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:49:19,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-26 00:49:19,412 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-11-26 00:49:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:19,412 INFO L85 PathProgramCache]: Analyzing trace with hash 458240329, now seen corresponding path program 1 times [2022-11-26 00:49:19,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:49:19,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375601269] [2022-11-26 00:49:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:19,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:49:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:49:24,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:49:24,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375601269] [2022-11-26 00:49:24,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375601269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:49:24,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167018900] [2022-11-26 00:49:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:49:24,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:24,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:49:24,891 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:49:24,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2807e1a-85b5-4b44-8dad-e2178a7f3405/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:49:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:49:25,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 150 conjunts are in the unsatisfiable core [2022-11-26 00:49:25,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:25,244 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 [2022-11-26 00:49:25,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:49:25,496 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-26 00:49:25,496 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 [2022-11-26 00:49:25,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:49:25,843 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-26 00:49:25,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 33 [2022-11-26 00:49:26,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-26 00:49:26,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:49:26,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 26 [2022-11-26 00:49:26,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-26 00:49:26,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-26 00:49:26,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:49:26,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:26,999 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 00:49:26,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 55 [2022-11-26 00:49:27,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:27,020 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-26 00:49:27,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2022-11-26 00:49:27,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:27,049 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 14 treesize of output 16 [2022-11-26 00:49:28,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:28,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:49:28,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-11-26 00:49:28,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:49:28,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 44 [2022-11-26 00:49:28,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:28,306 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 [2022-11-26 00:49:28,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:28,318 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 14 treesize of output 16 [2022-11-26 00:49:28,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:28,332 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 45 treesize of output 44 [2022-11-26 00:49:28,537 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 14 treesize of output 16 [2022-11-26 00:49:28,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-11-26 00:49:28,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:49:28,565 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 18 treesize of output 12 [2022-11-26 00:49:28,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:49:28,754 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 16 treesize of output 18 [2022-11-26 00:49:28,767 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 [2022-11-26 00:49:28,965 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-11-26 00:49:28,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 81 [2022-11-26 00:49:28,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:28,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2022-11-26 00:49:28,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:49:28,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:49:29,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2022-11-26 00:49:29,206 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 22 treesize of output 10 [2022-11-26 00:49:29,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:49:29,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:49:29,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-11-26 00:49:29,331 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:49:29,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:49:29,433 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3416 Int) (v_ArrVal_3414 (Array Int Int)) (v_ArrVal_3415 (Array Int Int))) (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4) v_ArrVal_3416)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3414) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3415) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)))) is different from false [2022-11-26 00:49:29,749 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3416 Int) (v_ArrVal_3410 (Array Int Int)) (v_ArrVal_3412 (Array Int Int)) (v_ArrVal_3414 (Array Int Int)) (v_ArrVal_3415 (Array Int Int)) (|ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| Int)) (= |c_ULTIMATE.start_main_~uneq~0#1| (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3412))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4) v_ArrVal_3416))) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3414) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3410) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3415) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)))) is different from false [2022-11-26 00:49:29,768 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3409 (Array Int Int)) (v_ArrVal_3416 Int) (v_ArrVal_3410 (Array Int Int)) (v_ArrVal_3412 (Array Int Int)) (v_ArrVal_3414 (Array Int Int)) (v_ArrVal_3415 (Array Int Int)) (|ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| Int) (v_ArrVal_3407 (Array Int Int)) (v_ArrVal_3408 (Array Int Int))) (= (select (select (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_3409) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3412))) (store .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|) (+ |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.offset| 4) v_ArrVal_3416))) (select (select (store (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_3408))) (store .cse1 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base|) |ULTIMATE.start_dll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base|))) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3414) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_prepend_~old_head~0#1.base| v_ArrVal_3407) |c_ULTIMATE.start_dll_circular_prepend_~last~1#1.base| v_ArrVal_3410) |c_ULTIMATE.start_dll_circular_prepend_~new_head~1#1.base| v_ArrVal_3415) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)) |c_ULTIMATE.start_main_~uneq~0#1|)) is different from false [2022-11-26 00:49:32,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:49:32,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 334 treesize of output 305 [2022-11-26 00:49:32,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:49:32,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 645980 treesize of output 638865 [2022-11-26 00:49:33,203 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 740110 treesize of output 660238 [2022-11-26 00:49:33,934 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 677134 treesize of output 653582 [2022-11-26 00:49:34,639 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 691958 treesize of output 681206