./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7 --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 db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:51:28,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:51:28,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:51:28,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:51:28,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:51:28,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:51:28,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:51:28,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:51:28,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:51:28,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:51:28,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:51:28,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:51:28,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:51:28,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:51:28,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:51:28,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:51:28,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:51:28,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:51:28,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:51:28,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:51:28,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:51:28,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:51:28,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:51:28,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:51:28,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:51:28,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:51:28,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:51:28,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:51:28,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:51:28,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:51:28,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:51:28,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:51:28,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:51:28,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:51:28,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:51:28,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:51:28,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:51:28,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:51:28,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:51:28,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:51:28,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:51:28,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 18:51:28,490 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:51:28,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:51:28,491 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:51:28,496 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:51:28,497 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:51:28,497 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:51:28,498 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:51:28,498 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:51:28,499 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:51:28,499 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:51:28,499 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:51:28,500 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:51:28,500 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:51:28,500 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:51:28,501 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:51:28,501 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:51:28,502 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:51:28,502 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:51:28,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:51:28,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:51:28,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:51:28,503 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:51:28,504 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:51:28,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:51:28,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:51:28,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:51:28,505 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:51:28,505 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:51:28,505 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:51:28,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:51:28,505 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:51:28,506 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:51:28,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:51:28,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:51:28,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:51:28,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:51:28,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:51:28,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:51:28,507 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:51:28,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:51:28,508 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:51:28,508 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:51:28,508 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 [2021-11-25 18:51:28,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:51:28,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:51:28,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:51:28,826 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:51:28,827 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:51:28,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2021-11-25 18:51:28,895 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/data/de3cce0f4/1221f7fe87ad4ed9b66ec11aee88518f/FLAGd4dd15001 [2021-11-25 18:51:29,419 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:51:29,420 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2021-11-25 18:51:29,444 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/data/de3cce0f4/1221f7fe87ad4ed9b66ec11aee88518f/FLAGd4dd15001 [2021-11-25 18:51:29,714 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/data/de3cce0f4/1221f7fe87ad4ed9b66ec11aee88518f [2021-11-25 18:51:29,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:51:29,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:51:29,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:51:29,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:51:29,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:51:29,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:51:29" (1/1) ... [2021-11-25 18:51:29,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e0cd616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:29, skipping insertion in model container [2021-11-25 18:51:29,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:51:29" (1/1) ... [2021-11-25 18:51:29,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:51:29,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:51:30,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:51:30,176 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:51:30,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:51:30,270 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:51:30,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:30 WrapperNode [2021-11-25 18:51:30,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:51:30,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:51:30,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:51:30,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:51:30,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:30" (1/1) ... [2021-11-25 18:51:30,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:30" (1/1) ... [2021-11-25 18:51:30,352 INFO L137 Inliner]: procedures = 125, calls = 95, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 302 [2021-11-25 18:51:30,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:51:30,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:51:30,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:51:30,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:51:30,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:30" (1/1) ... [2021-11-25 18:51:30,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:30" (1/1) ... [2021-11-25 18:51:30,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:30" (1/1) ... [2021-11-25 18:51:30,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:30" (1/1) ... [2021-11-25 18:51:30,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:30" (1/1) ... [2021-11-25 18:51:30,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:30" (1/1) ... [2021-11-25 18:51:30,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:30" (1/1) ... [2021-11-25 18:51:30,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:51:30,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:51:30,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:51:30,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:51:30,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:30" (1/1) ... [2021-11-25 18:51:30,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:51:30,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:51:30,486 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:51:30,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:51:30,534 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:51:30,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:51:30,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:51:30,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:51:30,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:51:30,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:51:30,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:51:30,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:51:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:51:30,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:51:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-25 18:51:30,537 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-25 18:51:30,648 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:51:30,650 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:51:31,410 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:51:31,458 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:51:31,458 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-25 18:51:31,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:51:31 BoogieIcfgContainer [2021-11-25 18:51:31,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:51:31,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:51:31,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:51:31,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:51:31,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:51:29" (1/3) ... [2021-11-25 18:51:31,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a5156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:51:31, skipping insertion in model container [2021-11-25 18:51:31,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:51:30" (2/3) ... [2021-11-25 18:51:31,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29a5156 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:51:31, skipping insertion in model container [2021-11-25 18:51:31,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:51:31" (3/3) ... [2021-11-25 18:51:31,470 INFO L111 eAbstractionObserver]: Analyzing ICFG split_list_test05-2.i [2021-11-25 18:51:31,476 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:51:31,476 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2021-11-25 18:51:31,522 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:51:31,529 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:51:31,529 INFO L340 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2021-11-25 18:51:31,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 293 states, 129 states have (on average 2.356589147286822) internal successors, (304), 278 states have internal predecessors, (304), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:51:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-25 18:51:31,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:31,558 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-25 18:51:31,559 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:51:31,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:31,565 INFO L85 PathProgramCache]: Analyzing trace with hash 17550, now seen corresponding path program 1 times [2021-11-25 18:51:31,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:31,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772360993] [2021-11-25 18:51:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:31,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:31,714 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:31,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772360993] [2021-11-25 18:51:31,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772360993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:51:31,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:51:31,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 18:51:31,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246323736] [2021-11-25 18:51:31,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:51:31,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:51:31,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:31,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:51:31,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:31,784 INFO L87 Difference]: Start difference. First operand has 293 states, 129 states have (on average 2.356589147286822) internal successors, (304), 278 states have internal predecessors, (304), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:32,280 INFO L93 Difference]: Finished difference Result 499 states and 552 transitions. [2021-11-25 18:51:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:51:32,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-11-25 18:51:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:32,302 INFO L225 Difference]: With dead ends: 499 [2021-11-25 18:51:32,302 INFO L226 Difference]: Without dead ends: 498 [2021-11-25 18:51:32,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:32,309 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 224 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:32,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 370 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:51:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-25 18:51:32,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 364. [2021-11-25 18:51:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 203 states have (on average 2.3201970443349755) internal successors, (471), 349 states have internal predecessors, (471), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:51:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 501 transitions. [2021-11-25 18:51:32,406 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 501 transitions. Word has length 2 [2021-11-25 18:51:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:32,407 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 501 transitions. [2021-11-25 18:51:32,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 501 transitions. [2021-11-25 18:51:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-25 18:51:32,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:32,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-25 18:51:32,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:51:32,408 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:51:32,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:32,409 INFO L85 PathProgramCache]: Analyzing trace with hash 17551, now seen corresponding path program 1 times [2021-11-25 18:51:32,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:32,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146763129] [2021-11-25 18:51:32,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:32,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:32,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:32,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146763129] [2021-11-25 18:51:32,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146763129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:51:32,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:51:32,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 18:51:32,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981253539] [2021-11-25 18:51:32,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:51:32,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:51:32,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:32,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:51:32,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:32,478 INFO L87 Difference]: Start difference. First operand 364 states and 501 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:32,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:32,708 INFO L93 Difference]: Finished difference Result 365 states and 504 transitions. [2021-11-25 18:51:32,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:51:32,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2021-11-25 18:51:32,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:32,712 INFO L225 Difference]: With dead ends: 365 [2021-11-25 18:51:32,712 INFO L226 Difference]: Without dead ends: 365 [2021-11-25 18:51:32,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:32,715 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 5 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:32,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 467 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:51:32,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-25 18:51:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2021-11-25 18:51:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 203 states have (on average 2.310344827586207) internal successors, (469), 347 states have internal predecessors, (469), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:51:32,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 499 transitions. [2021-11-25 18:51:32,747 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 499 transitions. Word has length 2 [2021-11-25 18:51:32,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:32,748 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 499 transitions. [2021-11-25 18:51:32,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:51:32,748 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 499 transitions. [2021-11-25 18:51:32,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:51:32,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:32,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:51:32,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:51:32,749 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:51:32,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:32,750 INFO L85 PathProgramCache]: Analyzing trace with hash -268395331, now seen corresponding path program 1 times [2021-11-25 18:51:32,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:32,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008559972] [2021-11-25 18:51:32,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:32,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:32,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:32,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008559972] [2021-11-25 18:51:32,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008559972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:51:32,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:51:32,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:51:32,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427038515] [2021-11-25 18:51:32,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:51:32,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:51:32,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:32,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:51:32,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:32,855 INFO L87 Difference]: Start difference. First operand 362 states and 499 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-25 18:51:33,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:33,081 INFO L93 Difference]: Finished difference Result 357 states and 494 transitions. [2021-11-25 18:51:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:51:33,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2021-11-25 18:51:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:33,085 INFO L225 Difference]: With dead ends: 357 [2021-11-25 18:51:33,085 INFO L226 Difference]: Without dead ends: 357 [2021-11-25 18:51:33,085 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:51:33,094 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 39 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:33,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 404 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:51:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-25 18:51:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2021-11-25 18:51:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 203 states have (on average 2.2857142857142856) internal successors, (464), 342 states have internal predecessors, (464), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:51:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 494 transitions. [2021-11-25 18:51:33,111 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 494 transitions. Word has length 8 [2021-11-25 18:51:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:33,111 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 494 transitions. [2021-11-25 18:51:33,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-25 18:51:33,112 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 494 transitions. [2021-11-25 18:51:33,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:51:33,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:33,113 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:51:33,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:51:33,113 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:51:33,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:33,114 INFO L85 PathProgramCache]: Analyzing trace with hash -268395330, now seen corresponding path program 1 times [2021-11-25 18:51:33,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:33,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710875263] [2021-11-25 18:51:33,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:33,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:33,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:33,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:33,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710875263] [2021-11-25 18:51:33,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710875263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:51:33,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:51:33,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:51:33,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656477405] [2021-11-25 18:51:33,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:51:33,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:51:33,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:33,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:51:33,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:51:33,204 INFO L87 Difference]: Start difference. First operand 357 states and 494 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-25 18:51:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:33,441 INFO L93 Difference]: Finished difference Result 352 states and 489 transitions. [2021-11-25 18:51:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:51:33,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2021-11-25 18:51:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:33,445 INFO L225 Difference]: With dead ends: 352 [2021-11-25 18:51:33,445 INFO L226 Difference]: Without dead ends: 352 [2021-11-25 18:51:33,445 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:51:33,447 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 34 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:33,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 415 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:51:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-25 18:51:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-25 18:51:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 203 states have (on average 2.2610837438423643) internal successors, (459), 337 states have internal predecessors, (459), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:51:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 489 transitions. [2021-11-25 18:51:33,461 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 489 transitions. Word has length 8 [2021-11-25 18:51:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:33,462 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 489 transitions. [2021-11-25 18:51:33,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-25 18:51:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 489 transitions. [2021-11-25 18:51:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:51:33,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:33,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:51:33,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:51:33,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:51:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:33,464 INFO L85 PathProgramCache]: Analyzing trace with hash 269679752, now seen corresponding path program 1 times [2021-11-25 18:51:33,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:33,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618353944] [2021-11-25 18:51:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:33,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:33,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:33,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618353944] [2021-11-25 18:51:33,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618353944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:51:33,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:51:33,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:51:33,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035624750] [2021-11-25 18:51:33,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:51:33,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:51:33,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:33,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:51:33,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:51:33,561 INFO L87 Difference]: Start difference. First operand 352 states and 489 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-25 18:51:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:34,152 INFO L93 Difference]: Finished difference Result 475 states and 526 transitions. [2021-11-25 18:51:34,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:51:34,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2021-11-25 18:51:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:34,156 INFO L225 Difference]: With dead ends: 475 [2021-11-25 18:51:34,156 INFO L226 Difference]: Without dead ends: 475 [2021-11-25 18:51:34,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:51:34,158 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 289 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:34,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 633 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:51:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-11-25 18:51:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 344. [2021-11-25 18:51:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 203 states have (on average 2.2216748768472905) internal successors, (451), 329 states have internal predecessors, (451), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:51:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2021-11-25 18:51:34,184 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 9 [2021-11-25 18:51:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:34,184 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2021-11-25 18:51:34,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-25 18:51:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2021-11-25 18:51:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:51:34,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:34,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:51:34,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:51:34,191 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:51:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:34,191 INFO L85 PathProgramCache]: Analyzing trace with hash 269679753, now seen corresponding path program 1 times [2021-11-25 18:51:34,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:34,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833451235] [2021-11-25 18:51:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:34,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:34,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:34,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833451235] [2021-11-25 18:51:34,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833451235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:51:34,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:51:34,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:51:34,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547230832] [2021-11-25 18:51:34,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:51:34,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:51:34,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:34,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:51:34,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:51:34,348 INFO L87 Difference]: Start difference. First operand 344 states and 481 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-25 18:51:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:35,118 INFO L93 Difference]: Finished difference Result 465 states and 516 transitions. [2021-11-25 18:51:35,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:51:35,118 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2021-11-25 18:51:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:35,121 INFO L225 Difference]: With dead ends: 465 [2021-11-25 18:51:35,121 INFO L226 Difference]: Without dead ends: 465 [2021-11-25 18:51:35,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:51:35,123 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 730 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:35,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 308 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:51:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-25 18:51:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 335. [2021-11-25 18:51:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 203 states have (on average 2.1724137931034484) internal successors, (441), 320 states have internal predecessors, (441), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:51:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 471 transitions. [2021-11-25 18:51:35,137 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 471 transitions. Word has length 9 [2021-11-25 18:51:35,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:35,137 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 471 transitions. [2021-11-25 18:51:35,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-25 18:51:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 471 transitions. [2021-11-25 18:51:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:51:35,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:35,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:51:35,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:51:35,139 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:51:35,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:35,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2120301909, now seen corresponding path program 1 times [2021-11-25 18:51:35,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:35,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868183352] [2021-11-25 18:51:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:35,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:35,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:35,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868183352] [2021-11-25 18:51:35,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868183352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:51:35,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:51:35,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:51:35,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739173444] [2021-11-25 18:51:35,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:51:35,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:51:35,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:35,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:51:35,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:51:35,316 INFO L87 Difference]: Start difference. First operand 335 states and 471 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-11-25 18:51:35,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:35,727 INFO L93 Difference]: Finished difference Result 352 states and 491 transitions. [2021-11-25 18:51:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:51:35,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 16 [2021-11-25 18:51:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:35,730 INFO L225 Difference]: With dead ends: 352 [2021-11-25 18:51:35,730 INFO L226 Difference]: Without dead ends: 352 [2021-11-25 18:51:35,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:51:35,731 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 18 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:35,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1032 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:51:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-25 18:51:35,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 342. [2021-11-25 18:51:35,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 209 states have (on average 2.1435406698564594) internal successors, (448), 326 states have internal predecessors, (448), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:51:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 480 transitions. [2021-11-25 18:51:35,746 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 480 transitions. Word has length 16 [2021-11-25 18:51:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:35,746 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 480 transitions. [2021-11-25 18:51:35,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-11-25 18:51:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 480 transitions. [2021-11-25 18:51:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:51:35,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:35,748 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:51:35,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:51:35,748 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:51:35,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:35,749 INFO L85 PathProgramCache]: Analyzing trace with hash 749666084, now seen corresponding path program 1 times [2021-11-25 18:51:35,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:35,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513728413] [2021-11-25 18:51:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:35,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:35,932 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513728413] [2021-11-25 18:51:35,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513728413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:51:35,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:51:35,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:51:35,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641327354] [2021-11-25 18:51:35,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:51:35,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:51:35,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:35,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:51:35,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:51:35,936 INFO L87 Difference]: Start difference. First operand 342 states and 480 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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) [2021-11-25 18:51:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:36,675 INFO L93 Difference]: Finished difference Result 476 states and 529 transitions. [2021-11-25 18:51:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:51:36,675 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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 17 [2021-11-25 18:51:36,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:36,677 INFO L225 Difference]: With dead ends: 476 [2021-11-25 18:51:36,678 INFO L226 Difference]: Without dead ends: 476 [2021-11-25 18:51:36,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:51:36,679 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 683 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:36,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 1063 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:51:36,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-25 18:51:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 344. [2021-11-25 18:51:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 211 states have (on average 2.132701421800948) internal successors, (450), 328 states have internal predecessors, (450), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:51:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 482 transitions. [2021-11-25 18:51:36,690 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 482 transitions. Word has length 17 [2021-11-25 18:51:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:36,690 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 482 transitions. [2021-11-25 18:51:36,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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) [2021-11-25 18:51:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 482 transitions. [2021-11-25 18:51:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 18:51:36,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:36,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:51:36,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:51:36,692 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:51:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:36,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1443652774, now seen corresponding path program 1 times [2021-11-25 18:51:36,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:36,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174671303] [2021-11-25 18:51:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:36,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:37,345 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:37,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174671303] [2021-11-25 18:51:37,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174671303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:51:37,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607884399] [2021-11-25 18:51:37,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:37,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:51:37,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:51:37,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:51:37,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:51:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:37,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-25 18:51:37,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:51:37,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:37,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:37,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:37,989 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:51:37,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 18:51:38,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:51:38,044 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:51:38,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 18:51:38,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:51:38,154 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:51:38,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 18:51:38,185 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:51:38,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 18:51:38,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 11 [2021-11-25 18:51:38,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:51:38,437 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 18:51:38,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 28 [2021-11-25 18:51:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:38,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:38,677 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-25 18:51:38,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 24 [2021-11-25 18:51:38,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 44 [2021-11-25 18:51:38,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 35 [2021-11-25 18:51:39,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 44 [2021-11-25 18:51:39,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 35 [2021-11-25 18:51:39,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 44 [2021-11-25 18:51:39,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 35 [2021-11-25 18:51:39,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:51:39,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-11-25 18:51:39,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:51:39,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2021-11-25 18:51:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:39,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:51:39,333 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_298 (Array Int Int)) (v_ArrVal_297 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_297) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_298) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_297 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_297) c_append_~head.base) (+ c_append_~head.offset 4)) 5)))) is different from false [2021-11-25 18:51:40,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:51:40,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 82 treesize of output 83 [2021-11-25 18:51:40,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:51:40,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 83 treesize of output 73 [2021-11-25 18:51:40,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:51:40,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:51:40,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 103 [2021-11-25 18:51:40,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:51:40,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:51:40,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 152 treesize of output 140 [2021-11-25 18:51:40,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:51:40,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 215 treesize of output 229 [2021-11-25 18:51:40,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 229 treesize of output 205 [2021-11-25 18:51:40,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 205 treesize of output 185 [2021-11-25 18:51:42,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607884399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:51:42,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346354458] [2021-11-25 18:51:42,543 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 18:51:42,543 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:51:42,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:51:42,554 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:51:42,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:51:42,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:51:42,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:51:42,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,924 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:51:42,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 42 [2021-11-25 18:51:42,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,945 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:51:42,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 32 [2021-11-25 18:51:42,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:42,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,985 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:51:42,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:51:42,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:42,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:43,033 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:51:43,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2021-11-25 18:51:43,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:43,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:43,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:51:43,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:43,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:43,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:43,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:43,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:43,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:43,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:51:43,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:51:43,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:43,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:43,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:43,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:43,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:43,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:43,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:51:45,116 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-25 18:51:45,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 634 treesize of output 627 [2021-11-25 18:51:46,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,528 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 27 for LOIs [2021-11-25 18:51:46,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:51:46,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:51:46,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:51:46,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:51:46,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:51:46,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:51:46,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:51:46,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:51:46,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:51:46,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:51:46,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:46,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:51:46,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:51:46,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:46,948 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:51:50,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6654#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (or (< (select |#length| |append_#t~mem60.base|) (+ |append_#t~mem60.offset| 9)) (< (+ |append_#t~mem60.offset| 5) 0)) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2021-11-25 18:51:50,014 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:51:50,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:51:50,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-11-25 18:51:50,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947137878] [2021-11-25 18:51:50,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:51:50,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 18:51:50,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:51:50,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 18:51:50,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2648, Unknown=2, NotChecked=104, Total=2970 [2021-11-25 18:51:50,018 INFO L87 Difference]: Start difference. First operand 344 states and 482 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 22 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:51:54,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:51:54,340 INFO L93 Difference]: Finished difference Result 763 states and 921 transitions. [2021-11-25 18:51:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 18:51:54,340 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 22 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-11-25 18:51:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:51:54,347 INFO L225 Difference]: With dead ends: 763 [2021-11-25 18:51:54,347 INFO L226 Difference]: Without dead ends: 763 [2021-11-25 18:51:54,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=362, Invalid=4196, Unknown=2, NotChecked=132, Total=4692 [2021-11-25 18:51:54,350 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 1735 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 3474 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1764 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 4491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 3474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 767 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:51:54,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1764 Valid, 1643 Invalid, 4491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 3474 Invalid, 0 Unknown, 767 Unchecked, 3.1s Time] [2021-11-25 18:51:54,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-11-25 18:51:54,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 411. [2021-11-25 18:51:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 247 states have (on average 2.02834008097166) internal successors, (501), 368 states have internal predecessors, (501), 46 states have call successors, (46), 3 states have call predecessors, (46), 2 states have return successors, (91), 45 states have call predecessors, (91), 46 states have call successors, (91) [2021-11-25 18:51:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 638 transitions. [2021-11-25 18:51:54,379 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 638 transitions. Word has length 31 [2021-11-25 18:51:54,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:51:54,380 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 638 transitions. [2021-11-25 18:51:54,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 22 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:51:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 638 transitions. [2021-11-25 18:51:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 18:51:54,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:51:54,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:51:54,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 18:51:54,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:51:54,607 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:51:54,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:51:54,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1443652773, now seen corresponding path program 1 times [2021-11-25 18:51:54,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:51:54,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860622087] [2021-11-25 18:51:54,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:54,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:51:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:55,098 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:51:55,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860622087] [2021-11-25 18:51:55,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860622087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:51:55,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956893040] [2021-11-25 18:51:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:51:55,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:51:55,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:51:55,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:51:55,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:51:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:51:55,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 18:51:55,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:51:55,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:55,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:55,538 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:51:55,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 18:51:55,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:51:55,648 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:51:55,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 18:51:55,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:51:55,809 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 18:51:55,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 28 [2021-11-25 18:51:55,999 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-25 18:51:55,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 45 [2021-11-25 18:51:56,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 36 [2021-11-25 18:51:56,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 36 [2021-11-25 18:51:56,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 36 [2021-11-25 18:51:56,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:51:56,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-11-25 18:51:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:51:56,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:51:56,449 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_455 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_455) c_append_~head.base) (+ c_append_~head.offset 4))) 1)) is different from false [2021-11-25 18:51:56,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:51:56,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 34 [2021-11-25 18:51:56,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:51:56,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 332 treesize of output 218 [2021-11-25 18:51:56,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 182 treesize of output 174 [2021-11-25 18:51:56,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 174 treesize of output 158 [2021-11-25 18:51:58,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956893040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:51:58,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374774046] [2021-11-25 18:51:58,352 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 18:51:58,352 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:51:58,352 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:51:58,353 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:51:58,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:51:58,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:51:58,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:51:58,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:51:58,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:51:58,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,667 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:51:58,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 32 [2021-11-25 18:51:58,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,703 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:51:58,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 42 [2021-11-25 18:51:58,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:58,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,765 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:51:58,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2021-11-25 18:51:58,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:58,808 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:51:58,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:51:59,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:59,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:59,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:51:59,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:59,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:59,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:59,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:59,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:59,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:59,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:59,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:59,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:51:59,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:59,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:59,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:51:59,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:51:59,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:00,602 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-25 18:52:00,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 615 treesize of output 608 [2021-11-25 18:52:01,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:01,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:01,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:52:01,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:52:01,886 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 27 for LOIs [2021-11-25 18:52:01,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:01,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:01,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:01,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:01,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:52:02,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:02,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:52:02,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:02,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:52:02,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:52:02,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:52:02,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:52:02,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:02,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:02,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:02,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:02,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:02,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:02,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:52:02,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:02,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:52:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:02,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:52:02,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:52:02,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:02,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:52:02,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:52:02,315 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:52:04,916 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8043#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (not (= (select |#valid| |append_#t~mem60.base|) 1)) (<= append_~input 127) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2021-11-25 18:52:04,916 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:52:04,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:52:04,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-11-25 18:52:04,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338973076] [2021-11-25 18:52:04,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:52:04,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 18:52:04,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:52:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 18:52:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2425, Unknown=3, NotChecked=100, Total=2756 [2021-11-25 18:52:04,919 INFO L87 Difference]: Start difference. First operand 411 states and 638 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 22 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:52:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:52:05,897 INFO L93 Difference]: Finished difference Result 449 states and 687 transitions. [2021-11-25 18:52:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:52:05,897 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 22 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-11-25 18:52:05,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:52:05,902 INFO L225 Difference]: With dead ends: 449 [2021-11-25 18:52:05,902 INFO L226 Difference]: Without dead ends: 449 [2021-11-25 18:52:05,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=252, Invalid=2719, Unknown=3, NotChecked=106, Total=3080 [2021-11-25 18:52:05,904 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 39 mSDsluCounter, 2123 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:52:05,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2273 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1389 Invalid, 0 Unknown, 302 Unchecked, 0.8s Time] [2021-11-25 18:52:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-25 18:52:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 445. [2021-11-25 18:52:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 278 states have (on average 1.9424460431654675) internal successors, (540), 398 states have internal predecessors, (540), 48 states have call successors, (48), 6 states have call predecessors, (48), 3 states have return successors, (95), 46 states have call predecessors, (95), 48 states have call successors, (95) [2021-11-25 18:52:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 683 transitions. [2021-11-25 18:52:05,929 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 683 transitions. Word has length 31 [2021-11-25 18:52:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:52:05,929 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 683 transitions. [2021-11-25 18:52:05,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 22 states have internal predecessors, (56), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:52:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 683 transitions. [2021-11-25 18:52:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 18:52:05,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:52:05,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:52:05,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:52:06,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:52:06,159 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:52:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:52:06,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1248379378, now seen corresponding path program 1 times [2021-11-25 18:52:06,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:52:06,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770876951] [2021-11-25 18:52:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:52:06,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:52:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:06,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:52:06,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770876951] [2021-11-25 18:52:06,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770876951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:52:06,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948738943] [2021-11-25 18:52:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:52:06,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:52:06,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:52:06,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:52:06,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:52:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:52:06,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 18:52:06,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:52:06,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:06,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:06,849 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 18:52:06,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:52:06,895 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:52:06,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-11-25 18:52:06,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:06,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 7 [2021-11-25 18:52:06,951 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:52:06,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-11-25 18:52:07,059 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 18:52:07,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 18:52:07,179 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:52:07,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:07,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 32 [2021-11-25 18:52:07,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:52:07,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:52:07,296 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_603 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_603) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2021-11-25 18:52:07,308 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_603 (Array Int Int)) (v_append_~node~0.base_33 Int)) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_33 v_ArrVal_603) |c_append_#in~head.base|) |c_append_#in~head.offset|) 0)) (not (= (select |c_#valid| v_append_~node~0.base_33) 0)))) is different from false [2021-11-25 18:52:07,318 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_603 (Array Int Int)) (v_append_~node~0.base_33 Int)) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_33 v_ArrVal_603) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) 0)) (not (= (select |c_#valid| v_append_~node~0.base_33) 0)))) is different from false [2021-11-25 18:52:07,444 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 18:52:07,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:52:07,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:52:07,452 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 18:52:07,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 64 treesize of output 34 [2021-11-25 18:52:07,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 18:52:07,465 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:52:07,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:52:07,751 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 18:52:07,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:52:07,785 INFO L354 Elim1Store]: treesize reduction 10, result has 71.4 percent of original size [2021-11-25 18:52:07,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 147 [2021-11-25 18:52:07,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 114 treesize of output 106 [2021-11-25 18:52:07,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 102 [2021-11-25 18:52:08,079 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:52:08,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:52:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-25 18:52:08,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948738943] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:52:08,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667094874] [2021-11-25 18:52:08,193 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 18:52:08,193 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:52:08,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:52:08,194 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:52:08,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:52:08,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:52:08,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:52:08,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 23 [2021-11-25 18:52:08,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-25 18:52:08,446 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:52:08,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-25 18:52:08,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 23 [2021-11-25 18:52:08,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2021-11-25 18:52:08,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 19 [2021-11-25 18:52:08,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,511 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:52:08,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 42 [2021-11-25 18:52:08,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 19 [2021-11-25 18:52:08,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,548 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:52:08,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 32 [2021-11-25 18:52:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,588 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:52:08,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:52:08,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,631 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:52:08,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 64 [2021-11-25 18:52:08,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 19 [2021-11-25 18:52:08,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:52:08,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:52:08,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:52:08,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:52:08,894 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 94 for LOIs [2021-11-25 18:52:11,449 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:52:40,115 WARN L227 SmtUtils]: Spent 10.96s on a formula simplification. DAG size of input: 196 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:53:00,916 WARN L227 SmtUtils]: Spent 11.85s on a formula simplification. DAG size of input: 218 DAG size of output: 184 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:53:32,653 WARN L227 SmtUtils]: Spent 17.74s on a formula simplification. DAG size of input: 227 DAG size of output: 194 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:53:54,243 WARN L227 SmtUtils]: Spent 5.86s on a formula simplification. DAG size of input: 199 DAG size of output: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:54:00,706 WARN L227 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 207 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:54:00,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9187#(and (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (<= 0 |#NULL.base|) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (< append_~node~0.base |#StackHeapBarrier|) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= |#NULL.offset| 0) (<= |append_#in~head.offset| 0) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (<= 0 append_~head.offset) (= append_~head.base |append_#in~head.base|) (<= |#NULL.base| 0) (= (select |#valid| append_~head.base) 1) (= 60 |append_#in~input|) (not (= (select |#valid| |append_#t~mem60.base|) 1)) (exists ((v_DerPreprocessor_6 Int)) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (store (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input) (+ append_~node~0.offset 1) v_DerPreprocessor_6) (+ 5 append_~node~0.offset) (select (select |#memory_int| append_~node~0.base) (+ 5 append_~node~0.offset)))))) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (exists ((v_DerPreprocessor_3 Int) (v_DerPreprocessor_1 Int)) (and (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_1) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_1)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))) (= (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_3) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_3)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0)) |#memory_$Pointer$.base|) (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_1)) append_~head.base) append_~head.offset) 0) (or (not (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_1)) append_~head.base) (+ append_~head.offset 4)) 0)) (not (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_3)) append_~head.base) (+ append_~head.offset 4)) 0))) (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_3)) append_~head.base) append_~head.offset) 0))) (= append_~input |append_#in~input|) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 18:54:00,707 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:54:00,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:54:00,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 35 [2021-11-25 18:54:00,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133873230] [2021-11-25 18:54:00,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:54:00,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 18:54:00,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:00,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 18:54:00,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2671, Unknown=27, NotChecked=330, Total=3422 [2021-11-25 18:54:00,712 INFO L87 Difference]: Start difference. First operand 445 states and 683 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 30 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:54:03,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:03,473 INFO L93 Difference]: Finished difference Result 560 states and 631 transitions. [2021-11-25 18:54:03,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 18:54:03,474 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 30 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-11-25 18:54:03,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:03,478 INFO L225 Difference]: With dead ends: 560 [2021-11-25 18:54:03,478 INFO L226 Difference]: Without dead ends: 560 [2021-11-25 18:54:03,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 72 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 110.9s TimeCoverageRelationStatistics Valid=656, Invalid=4295, Unknown=31, NotChecked=420, Total=5402 [2021-11-25 18:54:03,481 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 598 mSDsluCounter, 1797 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 3759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1423 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:03,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 1834 Invalid, 3759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2151 Invalid, 0 Unknown, 1423 Unchecked, 1.6s Time] [2021-11-25 18:54:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-25 18:54:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 409. [2021-11-25 18:54:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 269 states have (on average 1.933085501858736) internal successors, (520), 386 states have internal predecessors, (520), 21 states have call successors, (21), 6 states have call predecessors, (21), 3 states have return successors, (25), 18 states have call predecessors, (25), 21 states have call successors, (25) [2021-11-25 18:54:03,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 566 transitions. [2021-11-25 18:54:03,516 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 566 transitions. Word has length 32 [2021-11-25 18:54:03,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:03,517 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 566 transitions. [2021-11-25 18:54:03,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 30 states have internal predecessors, (70), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:54:03,517 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 566 transitions. [2021-11-25 18:54:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 18:54:03,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:03,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:03,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:54:03,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:03,737 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:54:03,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:03,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1845762523, now seen corresponding path program 1 times [2021-11-25 18:54:03,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:03,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730361647] [2021-11-25 18:54:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:03,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:54:04,211 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:04,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730361647] [2021-11-25 18:54:04,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730361647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:54:04,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575448137] [2021-11-25 18:54:04,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:04,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:04,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:04,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:54:04,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:54:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:04,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-25 18:54:04,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:54:04,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:04,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:04,631 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:54:04,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 18:54:04,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:54:04,711 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:54:04,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 18:54:04,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:04,851 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 18:54:04,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 28 [2021-11-25 18:54:05,037 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-25 18:54:05,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 45 [2021-11-25 18:54:05,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 36 [2021-11-25 18:54:05,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 36 [2021-11-25 18:54:05,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 36 [2021-11-25 18:54:05,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:05,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2021-11-25 18:54:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:54:05,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:54:05,473 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_754 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_754) c_append_~head.base) (+ c_append_~head.offset 4))) 1)) is different from false [2021-11-25 18:54:05,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:54:05,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 34 [2021-11-25 18:54:05,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:54:05,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 170 treesize of output 122 [2021-11-25 18:54:05,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 86 treesize of output 78 [2021-11-25 18:54:05,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 36 [2021-11-25 18:54:06,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575448137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:54:06,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [684801583] [2021-11-25 18:54:06,533 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-25 18:54:06,533 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:54:06,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:54:06,534 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:54:06,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:54:06,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:54:06,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:54:06,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:06,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:54:06,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,820 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:54:06,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 42 [2021-11-25 18:54:06,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,842 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:54:06,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 32 [2021-11-25 18:54:06,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:06,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,898 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:54:06,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2021-11-25 18:54:06,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:06,953 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:54:06,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:54:07,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:07,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:07,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:07,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:07,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:07,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:07,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:54:07,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:07,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:07,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:07,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:07,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:07,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:54:07,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:07,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:07,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:07,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:10,530 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 37 for LOIs [2021-11-25 18:54:10,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:10,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:54:10,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:54:10,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:10,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:54:10,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:54:10,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:54:10,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:54:10,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:10,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:10,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:10,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:10,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:10,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:10,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:10,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:54:10,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:54:10,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:10,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:54:10,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:54:10,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:54:10,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:54:10,869 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:54:13,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10397#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (not (= (select |#valid| |append_#t~mem60.base|) 1)) (<= append_~input 127) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2021-11-25 18:54:13,243 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:54:13,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:54:13,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-25 18:54:13,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285944164] [2021-11-25 18:54:13,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:54:13,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 18:54:13,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:13,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 18:54:13,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2541, Unknown=3, NotChecked=102, Total=2862 [2021-11-25 18:54:13,246 INFO L87 Difference]: Start difference. First operand 409 states and 566 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:54:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:14,671 INFO L93 Difference]: Finished difference Result 420 states and 578 transitions. [2021-11-25 18:54:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:54:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-25 18:54:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:14,674 INFO L225 Difference]: With dead ends: 420 [2021-11-25 18:54:14,674 INFO L226 Difference]: Without dead ends: 420 [2021-11-25 18:54:14,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=289, Invalid=3252, Unknown=3, NotChecked=116, Total=3660 [2021-11-25 18:54:14,676 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 56 mSDsluCounter, 3084 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 900 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:14,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 3171 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1648 Invalid, 0 Unknown, 900 Unchecked, 1.0s Time] [2021-11-25 18:54:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-25 18:54:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 419. [2021-11-25 18:54:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 279 states have (on average 1.903225806451613) internal successors, (531), 395 states have internal predecessors, (531), 21 states have call successors, (21), 7 states have call predecessors, (21), 3 states have return successors, (25), 18 states have call predecessors, (25), 21 states have call successors, (25) [2021-11-25 18:54:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 577 transitions. [2021-11-25 18:54:14,690 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 577 transitions. Word has length 33 [2021-11-25 18:54:14,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:14,690 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 577 transitions. [2021-11-25 18:54:14,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:54:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 577 transitions. [2021-11-25 18:54:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:54:14,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:14,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:14,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:54:14,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:54:14,907 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:54:14,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:14,907 INFO L85 PathProgramCache]: Analyzing trace with hash 828879740, now seen corresponding path program 1 times [2021-11-25 18:54:14,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:14,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246864791] [2021-11-25 18:54:14,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:14,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:54:15,218 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:15,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246864791] [2021-11-25 18:54:15,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246864791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:54:15,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116592860] [2021-11-25 18:54:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:15,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:15,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:15,219 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:54:15,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:54:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:15,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 18:54:15,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:54:15,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:15,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:15,557 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 18:54:15,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:54:15,597 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:54:15,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-11-25 18:54:15,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:15,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 7 [2021-11-25 18:54:15,656 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:54:15,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-11-25 18:54:15,737 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 18:54:15,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 18:54:15,861 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:54:15,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:15,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 32 [2021-11-25 18:54:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:54:15,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:54:15,956 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_902 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_902) c_append_~head.base) c_append_~head.offset) 0))) is different from false [2021-11-25 18:54:15,965 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_902 (Array Int Int)) (v_append_~node~0.base_42 Int)) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_42 v_ArrVal_902) |c_append_#in~head.base|) |c_append_#in~head.offset|) 0)) (not (= (select |c_#valid| v_append_~node~0.base_42) 0)))) is different from false [2021-11-25 18:54:15,975 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_902 (Array Int Int)) (v_append_~node~0.base_42 Int)) (or (not (= (select |c_#valid| v_append_~node~0.base_42) 0)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_42 v_ArrVal_902) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) 0)))) is different from false [2021-11-25 18:54:16,101 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 18:54:16,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:54:16,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:16,107 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 18:54:16,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 34 [2021-11-25 18:54:16,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-11-25 18:54:16,117 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:54:16,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:54:16,315 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-11-25 18:54:16,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 27 treesize of output 33 [2021-11-25 18:54:16,339 INFO L354 Elim1Store]: treesize reduction 10, result has 71.4 percent of original size [2021-11-25 18:54:16,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 85 [2021-11-25 18:54:16,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 52 treesize of output 48 [2021-11-25 18:54:16,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 48 treesize of output 46 [2021-11-25 18:54:16,631 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:54:16,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 18:54:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-25 18:54:16,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116592860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:54:16,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1548362166] [2021-11-25 18:54:16,751 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-25 18:54:16,751 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:54:16,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:54:16,752 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:54:16,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:54:16,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:16,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:16,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:16,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:54:16,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:16,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:16,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:54:16,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:16,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:16,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:16,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:16,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:16,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:16,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 23 [2021-11-25 18:54:16,972 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-11-25 18:54:16,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-11-25 18:54:16,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-25 18:54:16,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 19 [2021-11-25 18:54:17,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 23 [2021-11-25 18:54:17,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2021-11-25 18:54:17,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 19 [2021-11-25 18:54:17,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,052 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:54:17,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 42 [2021-11-25 18:54:17,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,072 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:54:17,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 32 [2021-11-25 18:54:17,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 19 [2021-11-25 18:54:17,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,115 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:54:17,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:54:17,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,153 INFO L354 Elim1Store]: treesize reduction 66, result has 29.0 percent of original size [2021-11-25 18:54:17,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 64 [2021-11-25 18:54:17,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:54:17,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:17,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:17,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:17,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:54:17,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:17,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:54:17,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:17,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:54:17,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:54:17,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:54:17,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:54:17,539 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:54:17,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:54:17,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:54:17,677 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:54:17,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:54:17,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:54:17,757 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 43 for LOIs [2021-11-25 18:54:18,087 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:54:26,400 WARN L227 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 122 DAG size of output: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:55:11,273 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 126 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 18:55:30,353 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11507#(and (= 0 (select |old(#valid)| append_~node~0.base)) (exists ((v_DerPreprocessor_19 Int)) (= (store |old(#memory_int)| append_~node~0.base (store (store (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input) (+ append_~node~0.offset 1) v_DerPreprocessor_19) (+ 5 append_~node~0.offset) (select (select |#memory_int| append_~node~0.base) (+ 5 append_~node~0.offset)))) |#memory_int|)) (not (= 60 |append_#in~input|)) (= |append_#in~head.offset| append_~head.offset) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< append_~node~0.base |#StackHeapBarrier|) (not (= 62 |append_#in~input|)) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (= |append_#in~head.offset| 0) (= append_~head.base |append_#in~head.base|) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (not (= (select |#valid| |append_#t~mem60.base|) 1)) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= 0 |#StackHeapBarrier|) (exists ((v_DerPreprocessor_17 Int) (v_DerPreprocessor_18 Int)) (and (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_17) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_17)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))) (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_17)) append_~head.base) append_~head.offset) 0) (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_18)) append_~head.base) append_~head.offset) 0) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (store (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_18) (+ append_~node~0.offset 1) (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_18)) append_~head.base) (+ append_~head.offset 4))) (+ 5 append_~node~0.offset) 0))) (or (not (= (select (select (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_18)) append_~head.base) (+ append_~head.offset 4)) 0)) (not (= (select (select (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset v_DerPreprocessor_17)) append_~head.base) (+ append_~head.offset 4)) 0))))) (= |#NULL.base| 0))' at error location [2021-11-25 18:55:30,353 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:55:30,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:55:30,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 35 [2021-11-25 18:55:30,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056479976] [2021-11-25 18:55:30,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:55:30,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 18:55:30,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 18:55:30,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2576, Unknown=27, NotChecked=324, Total=3306 [2021-11-25 18:55:30,357 INFO L87 Difference]: Start difference. First operand 419 states and 577 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 30 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:55:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:32,521 INFO L93 Difference]: Finished difference Result 530 states and 585 transitions. [2021-11-25 18:55:32,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 18:55:32,521 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 30 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2021-11-25 18:55:32,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:32,525 INFO L225 Difference]: With dead ends: 530 [2021-11-25 18:55:32,525 INFO L226 Difference]: Without dead ends: 530 [2021-11-25 18:55:32,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 73.6s TimeCoverageRelationStatistics Valid=554, Invalid=3712, Unknown=36, NotChecked=390, Total=4692 [2021-11-25 18:55:32,528 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 815 mSDsluCounter, 2537 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 2534 SdHoareTripleChecker+Invalid, 3901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2050 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:32,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 2534 Invalid, 3901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1729 Invalid, 0 Unknown, 2050 Unchecked, 1.3s Time] [2021-11-25 18:55:32,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-25 18:55:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 397. [2021-11-25 18:55:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 259 states have (on average 1.9382239382239381) internal successors, (502), 376 states have internal predecessors, (502), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-25 18:55:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 538 transitions. [2021-11-25 18:55:32,546 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 538 transitions. Word has length 34 [2021-11-25 18:55:32,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:32,547 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 538 transitions. [2021-11-25 18:55:32,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 30 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:55:32,547 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 538 transitions. [2021-11-25 18:55:32,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 18:55:32,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:32,549 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:32,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:55:32,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:55:32,763 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:55:32,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:32,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1786728893, now seen corresponding path program 1 times [2021-11-25 18:55:32,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:32,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115941214] [2021-11-25 18:55:32,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:32,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:55:33,179 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:33,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115941214] [2021-11-25 18:55:33,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115941214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:55:33,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558943647] [2021-11-25 18:55:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:33,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:33,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:55:33,181 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:55:33,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:55:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:33,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-25 18:55:33,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:55:33,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:33,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:33,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:33,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:33,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-25 18:55:33,881 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-25 18:55:33,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2021-11-25 18:55:33,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 36 [2021-11-25 18:55:33,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 35 [2021-11-25 18:55:34,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 36 [2021-11-25 18:55:34,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 35 [2021-11-25 18:55:34,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 36 [2021-11-25 18:55:34,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 35 [2021-11-25 18:55:34,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:34,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-25 18:55:34,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:34,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:55:34,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 17 [2021-11-25 18:55:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:55:34,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:55:34,267 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1118 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1118) c_append_~head.base) (+ c_append_~head.offset 4))))) (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1118 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1118) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1119) c_append_~head.base) .cse0)))))) is different from false [2021-11-25 18:55:36,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:55:36,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 73 treesize of output 74 [2021-11-25 18:55:36,625 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:55:36,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 74 treesize of output 64 [2021-11-25 18:55:36,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:36,638 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-25 18:55:36,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 61 treesize of output 52 [2021-11-25 18:55:36,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:36,651 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:55:36,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 28 [2021-11-25 18:55:36,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:55:36,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 51 [2021-11-25 18:55:36,670 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:55:36,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-11-25 18:55:37,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:55:37,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 73 treesize of output 74 [2021-11-25 18:55:37,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:55:37,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 74 treesize of output 64 [2021-11-25 18:55:37,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:55:37,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 94 treesize of output 97 [2021-11-25 18:55:37,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:55:37,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 159 treesize of output 150 [2021-11-25 18:55:37,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 111 treesize of output 103 [2021-11-25 18:55:37,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 95 [2021-11-25 18:55:37,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 95 treesize of output 91 [2021-11-25 18:55:38,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 68 [2021-11-25 18:55:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2021-11-25 18:55:39,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558943647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:55:39,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [38506384] [2021-11-25 18:55:39,557 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-25 18:55:39,558 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:55:39,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:55:39,558 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:55:39,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:55:39,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:39,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:55:39,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:39,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:39,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:39,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:39,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:55:39,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:55:39,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:55:39,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:39,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:39,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:39,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:39,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:39,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:55:39,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:55:39,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:39,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,869 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:55:39,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 41 [2021-11-25 18:55:39,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,896 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:55:39,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 41 [2021-11-25 18:55:39,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:39,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:40,008 INFO L354 Elim1Store]: treesize reduction 110, result has 39.6 percent of original size [2021-11-25 18:55:40,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 176 treesize of output 174 [2021-11-25 18:55:40,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:40,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:40,072 INFO L354 Elim1Store]: treesize reduction 86, result has 35.8 percent of original size [2021-11-25 18:55:40,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 172 treesize of output 152 [2021-11-25 18:55:40,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:40,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:55:40,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:40,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:40,251 INFO L354 Elim1Store]: treesize reduction 178, result has 31.0 percent of original size [2021-11-25 18:55:40,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 484 treesize of output 441 [2021-11-25 18:55:40,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:40,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:55:40,365 INFO L354 Elim1Store]: treesize reduction 138, result has 34.3 percent of original size [2021-11-25 18:55:40,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 411 treesize of output 380 [2021-11-25 18:56:12,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:12,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:12,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:12,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:12,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:12,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:12,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:12,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:12,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:12,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:12,645 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:56:12,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 42 [2021-11-25 18:56:12,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:12,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:12,663 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:56:12,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 32 [2021-11-25 18:56:12,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:12,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:12,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:12,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:12,717 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:56:12,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2021-11-25 18:56:12,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:12,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:12,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:12,754 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:56:12,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:56:12,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:13,407 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:56:13,744 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:56:14,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:56:14,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:56:14,254 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:56:14,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:56:14,295 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:56:14,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:56:14,339 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:56:14,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:56:14,375 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:56:14,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:56:14,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,422 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 16 for LOIs [2021-11-25 18:56:14,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:56:14,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:56:14,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:14,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:56:14,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:14,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:56:14,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,643 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-11-25 18:56:14,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 166 treesize of output 150 [2021-11-25 18:56:14,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,721 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 18:56:14,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 208 [2021-11-25 18:56:14,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 1 [2021-11-25 18:56:14,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:14,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,835 INFO L354 Elim1Store]: treesize reduction 150, result has 19.8 percent of original size [2021-11-25 18:56:14,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 309 treesize of output 242 [2021-11-25 18:56:14,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:14,892 INFO L354 Elim1Store]: treesize reduction 132, result has 32.3 percent of original size [2021-11-25 18:56:14,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 289 treesize of output 280 [2021-11-25 18:56:15,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:15,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:15,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:15,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:15,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:15,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:15,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:56:15,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:15,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:56:15,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:15,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:56:15,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:15,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:15,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:15,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:56:15,310 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:56:17,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12784#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (or (< (select |#length| |append_#t~mem60.base|) (+ |append_#t~mem60.offset| 9)) (< (+ |append_#t~mem60.offset| 5) 0)) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2021-11-25 18:56:17,383 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:56:17,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:56:17,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2021-11-25 18:56:17,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263436805] [2021-11-25 18:56:17,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:56:17,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:56:17,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:56:17,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:56:17,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2410, Unknown=5, NotChecked=100, Total=2756 [2021-11-25 18:56:17,385 INFO L87 Difference]: Start difference. First operand 397 states and 538 transitions. Second operand has 31 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 25 states have internal predecessors, (91), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:56:19,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:56:19,100 INFO L93 Difference]: Finished difference Result 411 states and 551 transitions. [2021-11-25 18:56:19,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 18:56:19,100 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 25 states have internal predecessors, (91), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2021-11-25 18:56:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:56:19,103 INFO L225 Difference]: With dead ends: 411 [2021-11-25 18:56:19,103 INFO L226 Difference]: Without dead ends: 411 [2021-11-25 18:56:19,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=465, Invalid=3694, Unknown=5, NotChecked=126, Total=4290 [2021-11-25 18:56:19,104 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 137 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 742 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:56:19,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 1928 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 878 Invalid, 0 Unknown, 742 Unchecked, 0.5s Time] [2021-11-25 18:56:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-25 18:56:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 410. [2021-11-25 18:56:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 271 states have (on average 1.900369003690037) internal successors, (515), 388 states have internal predecessors, (515), 18 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-25 18:56:19,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 551 transitions. [2021-11-25 18:56:19,115 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 551 transitions. Word has length 45 [2021-11-25 18:56:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:56:19,116 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 551 transitions. [2021-11-25 18:56:19,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 25 states have internal predecessors, (91), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:56:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 551 transitions. [2021-11-25 18:56:19,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 18:56:19,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:56:19,118 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:56:19,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:56:19,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:56:19,335 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:56:19,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:56:19,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1786728892, now seen corresponding path program 1 times [2021-11-25 18:56:19,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:56:19,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515501541] [2021-11-25 18:56:19,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:19,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:56:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:56:19,656 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:56:19,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515501541] [2021-11-25 18:56:19,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515501541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:56:19,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315206820] [2021-11-25 18:56:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:19,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:56:19,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:56:19,659 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:56:19,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:56:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:19,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-25 18:56:19,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:56:19,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:20,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:20,120 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-25 18:56:20,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 41 [2021-11-25 18:56:20,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2021-11-25 18:56:20,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2021-11-25 18:56:20,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 24 [2021-11-25 18:56:20,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:56:20,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:56:20,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:20,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 31 [2021-11-25 18:56:20,458 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-25 18:56:20,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 84 treesize of output 57 [2021-11-25 18:56:20,496 INFO L354 Elim1Store]: treesize reduction 10, result has 83.6 percent of original size [2021-11-25 18:56:20,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 278 treesize of output 308 [2021-11-25 18:56:20,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 25 [2021-11-25 18:56:20,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:20,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 28 [2021-11-25 18:56:20,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:20,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 49 [2021-11-25 18:56:20,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 18:56:28,878 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 18:56:28,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 1 [2021-11-25 18:56:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:56:28,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315206820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:56:28,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2030709692] [2021-11-25 18:56:28,921 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-25 18:56:28,921 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:56:28,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:56:28,922 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:56:28,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:56:28,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:28,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:28,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:28,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:28,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:56:28,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:28,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:28,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:28,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:28,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:28,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:56:29,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:29,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:29,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:56:29,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:29,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:29,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:29,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:29,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:29,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:56:29,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:56:29,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:29,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,177 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:56:29,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 41 [2021-11-25 18:56:29,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,205 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:56:29,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 41 [2021-11-25 18:56:29,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:29,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,294 INFO L354 Elim1Store]: treesize reduction 110, result has 39.6 percent of original size [2021-11-25 18:56:29,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 176 treesize of output 174 [2021-11-25 18:56:29,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,346 INFO L354 Elim1Store]: treesize reduction 86, result has 35.8 percent of original size [2021-11-25 18:56:29,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 172 treesize of output 152 [2021-11-25 18:56:29,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:29,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,561 INFO L354 Elim1Store]: treesize reduction 172, result has 34.4 percent of original size [2021-11-25 18:56:29,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 436 treesize of output 395 [2021-11-25 18:56:29,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:29,677 INFO L354 Elim1Store]: treesize reduction 132, result has 33.3 percent of original size [2021-11-25 18:56:29,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 363 treesize of output 342 [2021-11-25 18:56:46,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:46,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:46,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:46,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:46,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:46,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:46,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:46,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:46,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:46,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:46,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:46,241 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:56:46,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 32 [2021-11-25 18:56:46,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:46,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:46,262 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:56:46,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 42 [2021-11-25 18:56:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:46,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:46,305 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:56:46,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2021-11-25 18:56:46,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:46,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:46,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:46,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:46,341 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:56:46,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:56:47,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:56:47,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:47,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:56:47,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:56:47,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,342 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:56:47,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:56:47,379 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:56:47,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:56:47,422 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:56:47,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:56:47,453 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:56:47,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:56:47,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:47,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:56:47,504 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 16 for LOIs [2021-11-25 18:56:47,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:56:47,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:56:47,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:47,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:56:47,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:47,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:56:47,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,742 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-11-25 18:56:47,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 166 treesize of output 150 [2021-11-25 18:56:47,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,797 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 18:56:47,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 208 [2021-11-25 18:56:47,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 1 [2021-11-25 18:56:47,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,889 INFO L354 Elim1Store]: treesize reduction 110, result has 23.6 percent of original size [2021-11-25 18:56:47,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 322 treesize of output 299 [2021-11-25 18:56:47,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:47,935 INFO L354 Elim1Store]: treesize reduction 124, result has 22.5 percent of original size [2021-11-25 18:56:47,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 358 treesize of output 275 [2021-11-25 18:56:47,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:47,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:48,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:48,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:48,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:48,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:56:48,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:48,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:56:48,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:48,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:56:48,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:48,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:48,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:48,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:56:48,127 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:56:50,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13947#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (not (= (select |#valid| |append_#t~mem60.base|) 1)) (<= append_~input 127) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2021-11-25 18:56:50,088 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:56:50,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:56:50,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2021-11-25 18:56:50,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008681215] [2021-11-25 18:56:50,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:56:50,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 18:56:50,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:56:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 18:56:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1943, Unknown=7, NotChecked=0, Total=2162 [2021-11-25 18:56:50,090 INFO L87 Difference]: Start difference. First operand 410 states and 551 transitions. Second operand has 25 states, 22 states have (on average 4.045454545454546) internal successors, (89), 21 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:56:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:56:51,782 INFO L93 Difference]: Finished difference Result 545 states and 596 transitions. [2021-11-25 18:56:51,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:56:51,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 4.045454545454546) internal successors, (89), 21 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2021-11-25 18:56:51,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:56:51,785 INFO L225 Difference]: With dead ends: 545 [2021-11-25 18:56:51,786 INFO L226 Difference]: Without dead ends: 545 [2021-11-25 18:56:51,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=316, Invalid=2433, Unknown=7, NotChecked=0, Total=2756 [2021-11-25 18:56:51,788 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 539 mSDsluCounter, 2314 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 2313 SdHoareTripleChecker+Invalid, 3367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1265 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:56:51,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 2313 Invalid, 3367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2037 Invalid, 0 Unknown, 1265 Unchecked, 1.3s Time] [2021-11-25 18:56:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-25 18:56:51,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 415. [2021-11-25 18:56:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 275 states have (on average 1.8727272727272728) internal successors, (515), 393 states have internal predecessors, (515), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-25 18:56:51,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 551 transitions. [2021-11-25 18:56:51,800 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 551 transitions. Word has length 45 [2021-11-25 18:56:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:56:51,800 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 551 transitions. [2021-11-25 18:56:51,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 4.045454545454546) internal successors, (89), 21 states have internal predecessors, (89), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:56:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 551 transitions. [2021-11-25 18:56:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 18:56:51,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:56:51,802 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:56:51,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:56:52,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 18:56:52,027 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:56:52,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:56:52,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1526763664, now seen corresponding path program 1 times [2021-11-25 18:56:52,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:56:52,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516129184] [2021-11-25 18:56:52,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:52,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:56:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:56:52,425 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:56:52,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516129184] [2021-11-25 18:56:52,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516129184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:56:52,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282755647] [2021-11-25 18:56:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:56:52,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:56:52,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:56:52,427 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:56:52,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:56:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:56:52,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 18:56:52,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:56:52,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:52,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:52,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:53,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:53,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-25 18:56:53,195 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-25 18:56:53,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2021-11-25 18:56:53,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 36 [2021-11-25 18:56:53,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 35 [2021-11-25 18:56:53,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 36 [2021-11-25 18:56:53,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 35 [2021-11-25 18:56:53,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 36 [2021-11-25 18:56:53,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 35 [2021-11-25 18:56:53,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:53,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-25 18:56:53,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:53,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:53,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 17 [2021-11-25 18:56:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:56:53,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:56:53,552 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1538 (Array Int Int)) (v_ArrVal_1539 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1538) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1539) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_1538 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1538) c_append_~head.base) (+ c_append_~head.offset 4)))))) is different from false [2021-11-25 18:56:55,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:55,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 73 treesize of output 74 [2021-11-25 18:56:55,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:55,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 74 treesize of output 64 [2021-11-25 18:56:55,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:55,967 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-25 18:56:55,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 61 treesize of output 52 [2021-11-25 18:56:55,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:55,977 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:56:55,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 28 [2021-11-25 18:56:55,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:55,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 51 [2021-11-25 18:56:55,995 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:56:55,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-11-25 18:56:57,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:57,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 73 treesize of output 74 [2021-11-25 18:56:57,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:57,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 74 treesize of output 64 [2021-11-25 18:56:57,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:57,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 94 treesize of output 97 [2021-11-25 18:56:57,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:56:57,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 159 treesize of output 150 [2021-11-25 18:56:57,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 111 treesize of output 103 [2021-11-25 18:56:57,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 95 [2021-11-25 18:56:57,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 95 treesize of output 91 [2021-11-25 18:56:57,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 68 [2021-11-25 18:56:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 7 not checked. [2021-11-25 18:56:58,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282755647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:56:58,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148931907] [2021-11-25 18:56:58,593 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-25 18:56:58,593 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:56:58,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:56:58,594 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:56:58,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:56:58,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:58,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:58,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:58,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:56:58,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:58,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:58,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:56:58,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:56:58,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:56:58,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:58,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:58,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:58,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:58,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:58,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:56:58,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:58,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:56:58,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:58,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,817 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:56:58,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 41 [2021-11-25 18:56:58,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,839 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:56:58,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 41 [2021-11-25 18:56:58,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,920 INFO L354 Elim1Store]: treesize reduction 110, result has 39.6 percent of original size [2021-11-25 18:56:58,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 176 treesize of output 174 [2021-11-25 18:56:58,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:58,971 INFO L354 Elim1Store]: treesize reduction 86, result has 35.8 percent of original size [2021-11-25 18:56:58,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 172 treesize of output 152 [2021-11-25 18:56:58,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:56:59,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:59,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:59,147 INFO L354 Elim1Store]: treesize reduction 206, result has 36.0 percent of original size [2021-11-25 18:56:59,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 475 treesize of output 484 [2021-11-25 18:56:59,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:59,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:56:59,234 INFO L354 Elim1Store]: treesize reduction 148, result has 29.5 percent of original size [2021-11-25 18:56:59,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 505 treesize of output 414 [2021-11-25 18:57:19,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:19,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:19,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:19,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:19,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:19,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:19,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:19,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:19,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:19,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:19,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:19,662 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:57:19,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 32 [2021-11-25 18:57:19,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:19,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:19,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:19,701 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:57:19,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 42 [2021-11-25 18:57:19,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:19,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:19,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:19,746 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:57:19,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2021-11-25 18:57:19,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:19,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:19,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:19,777 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:57:19,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:57:19,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:20,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:20,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:20,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:20,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:20,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:20,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:20,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:57:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:20,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:20,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:20,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:57:20,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:20,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:20,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:20,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:20,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:57:20,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:20,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:20,769 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:57:20,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:57:20,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:20,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:20,866 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:57:20,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:57:20,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:20,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:20,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:20,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:20,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:20,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:57:21,006 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:57:21,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:57:21,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:21,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:21,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:57:21,085 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:57:21,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:57:21,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:21,145 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:57:21,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:57:21,183 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:57:21,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:57:21,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:21,200 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 62 for LOIs [2021-11-25 18:57:21,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:57:21,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:57:21,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:21,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:21,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:57:21,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:21,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:57:21,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:21,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,607 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-11-25 18:57:21,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 166 treesize of output 150 [2021-11-25 18:57:21,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,659 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 18:57:21,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 208 [2021-11-25 18:57:21,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 1 [2021-11-25 18:57:21,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:21,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,756 INFO L354 Elim1Store]: treesize reduction 150, result has 19.8 percent of original size [2021-11-25 18:57:21,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 309 treesize of output 242 [2021-11-25 18:57:21,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:21,812 INFO L354 Elim1Store]: treesize reduction 132, result has 32.3 percent of original size [2021-11-25 18:57:21,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 289 treesize of output 280 [2021-11-25 18:57:22,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:22,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:22,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:22,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:22,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:22,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:22,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:57:22,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:22,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:57:22,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:22,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:57:22,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:22,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:22,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:57:22,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:22,218 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:57:25,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15267#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (or (< (select |#length| |append_#t~mem60.base|) (+ |append_#t~mem60.offset| 9)) (< (+ |append_#t~mem60.offset| 5) 0)) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2021-11-25 18:57:25,616 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:57:25,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:57:25,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2021-11-25 18:57:25,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856044560] [2021-11-25 18:57:25,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:57:25,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 18:57:25,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:25,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 18:57:25,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2337, Unknown=4, NotChecked=98, Total=2652 [2021-11-25 18:57:25,619 INFO L87 Difference]: Start difference. First operand 415 states and 551 transitions. Second operand has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 28 states have internal predecessors, (97), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:57:27,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:27,371 INFO L93 Difference]: Finished difference Result 415 states and 550 transitions. [2021-11-25 18:57:27,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:57:27,371 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 28 states have internal predecessors, (97), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2021-11-25 18:57:27,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:27,374 INFO L225 Difference]: With dead ends: 415 [2021-11-25 18:57:27,374 INFO L226 Difference]: Without dead ends: 415 [2021-11-25 18:57:27,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 111 SyntacticMatches, 9 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=380, Invalid=3402, Unknown=4, NotChecked=120, Total=3906 [2021-11-25 18:57:27,376 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 91 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1119 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:27,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1708 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 873 Invalid, 0 Unknown, 1119 Unchecked, 0.6s Time] [2021-11-25 18:57:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-11-25 18:57:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 401. [2021-11-25 18:57:27,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 263 states have (on average 1.908745247148289) internal successors, (502), 380 states have internal predecessors, (502), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-25 18:57:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 536 transitions. [2021-11-25 18:57:27,387 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 536 transitions. Word has length 49 [2021-11-25 18:57:27,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:27,388 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 536 transitions. [2021-11-25 18:57:27,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2333333333333334) internal successors, (97), 28 states have internal predecessors, (97), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:57:27,388 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 536 transitions. [2021-11-25 18:57:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 18:57:27,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:27,389 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:27,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:27,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:57:27,603 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:57:27,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:27,603 INFO L85 PathProgramCache]: Analyzing trace with hash 110949190, now seen corresponding path program 1 times [2021-11-25 18:57:27,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:27,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974453041] [2021-11-25 18:57:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:27,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:57:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:57:27,883 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:57:27,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974453041] [2021-11-25 18:57:27,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974453041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:57:27,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593069825] [2021-11-25 18:57:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:27,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:57:27,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:57:27,884 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:57:27,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:57:28,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:57:28,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 18:57:28,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:57:28,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:28,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:28,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:28,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:28,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-25 18:57:28,434 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-25 18:57:28,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2021-11-25 18:57:28,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 36 [2021-11-25 18:57:28,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 35 [2021-11-25 18:57:28,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 36 [2021-11-25 18:57:28,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 35 [2021-11-25 18:57:28,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 36 [2021-11-25 18:57:28,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 35 [2021-11-25 18:57:28,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:28,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-25 18:57:28,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:28,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:28,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 17 [2021-11-25 18:57:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 18:57:28,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:57:28,839 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1751 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1751) c_append_~head.base) (+ c_append_~head.offset 4))))) (forall ((v_ArrVal_1752 (Array Int Int)) (v_ArrVal_1751 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1751) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1752) c_append_~head.base) .cse0)))))) is different from false [2021-11-25 18:57:29,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:29,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 73 treesize of output 74 [2021-11-25 18:57:29,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:29,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 74 treesize of output 64 [2021-11-25 18:57:29,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:29,853 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-25 18:57:29,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 61 treesize of output 52 [2021-11-25 18:57:29,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:29,862 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 18:57:29,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 28 [2021-11-25 18:57:29,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:29,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 51 [2021-11-25 18:57:29,878 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:57:29,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2021-11-25 18:57:30,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:30,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 73 treesize of output 74 [2021-11-25 18:57:30,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:30,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 74 treesize of output 64 [2021-11-25 18:57:30,193 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:30,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 94 treesize of output 97 [2021-11-25 18:57:30,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:30,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 159 treesize of output 150 [2021-11-25 18:57:30,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 111 treesize of output 103 [2021-11-25 18:57:30,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 95 [2021-11-25 18:57:30,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 95 treesize of output 91 [2021-11-25 18:57:30,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 68 [2021-11-25 18:57:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2021-11-25 18:57:31,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593069825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:57:31,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180673537] [2021-11-25 18:57:31,322 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 18:57:31,322 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:57:31,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:57:31,323 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:57:31,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:57:31,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 18:57:31,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-25 18:57:31,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:31,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:57:31,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:57:31,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:57:31,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,548 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:57:31,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 41 [2021-11-25 18:57:31,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,575 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 18:57:31,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 41 [2021-11-25 18:57:31,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,655 INFO L354 Elim1Store]: treesize reduction 110, result has 39.6 percent of original size [2021-11-25 18:57:31,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 176 treesize of output 174 [2021-11-25 18:57:31,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,706 INFO L354 Elim1Store]: treesize reduction 86, result has 35.8 percent of original size [2021-11-25 18:57:31,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 172 treesize of output 152 [2021-11-25 18:57:31,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:31,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,874 INFO L354 Elim1Store]: treesize reduction 172, result has 34.4 percent of original size [2021-11-25 18:57:31,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 438 treesize of output 397 [2021-11-25 18:57:31,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:31,953 INFO L354 Elim1Store]: treesize reduction 136, result has 31.3 percent of original size [2021-11-25 18:57:31,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 391 treesize of output 354 [2021-11-25 18:57:51,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:51,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:51,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:51,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:51,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:51,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:51,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:51,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:51,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:51,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:51,178 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-25 18:57:51,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 32 [2021-11-25 18:57:51,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:51,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:51,200 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 18:57:51,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 42 [2021-11-25 18:57:51,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:51,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:51,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:51,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:51,247 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-25 18:57:51,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2021-11-25 18:57:51,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:51,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:51,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:51,279 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-25 18:57:51,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:57:51,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:51,622 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:57:51,624 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:57:51,624 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:57:51,626 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:57:51,631 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:57:51,633 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:57:51,642 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:57:51,642 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:57:51,643 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:57:51,649 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:57:51,887 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:57:51,889 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:57:51,889 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:57:51,891 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:57:51,896 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:57:51,899 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:57:51,907 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:57:51,908 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:57:51,908 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 18:57:51,915 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 18:57:52,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:52,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:52,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:57:52,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:52,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 15 [2021-11-25 18:57:52,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:52,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:52,326 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:57:52,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:57:52,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:52,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:52,413 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:57:52,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:57:52,423 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:52,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:52,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:57:52,575 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:57:52,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:57:52,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:52,644 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:57:52,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:57:52,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:52,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 18:57:52,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:57:52,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 [2021-11-25 18:57:52,736 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 18:57:52,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2021-11-25 18:57:52,740 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 93 for LOIs [2021-11-25 18:57:52,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:52,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:57:52,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 18:57:52,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:52,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:52,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:57:52,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:52,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 31 [2021-11-25 18:57:52,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:52,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,021 INFO L354 Elim1Store]: treesize reduction 108, result has 34.9 percent of original size [2021-11-25 18:57:53,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 166 treesize of output 150 [2021-11-25 18:57:53,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,074 INFO L354 Elim1Store]: treesize reduction 94, result has 39.0 percent of original size [2021-11-25 18:57:53,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 222 treesize of output 208 [2021-11-25 18:57:53,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 1 [2021-11-25 18:57:53,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,160 INFO L354 Elim1Store]: treesize reduction 150, result has 19.8 percent of original size [2021-11-25 18:57:53,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 309 treesize of output 242 [2021-11-25 18:57:53,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,217 INFO L354 Elim1Store]: treesize reduction 132, result has 32.3 percent of original size [2021-11-25 18:57:53,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 289 treesize of output 280 [2021-11-25 18:57:53,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:53,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:53,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:53,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:53,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:53,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:53,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:53,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:57:53,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 18:57:53,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:53,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:57:53,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:53,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:57:53,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:57:53,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:57:53,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 18:57:53,644 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:57:57,091 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16468#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem60.offset|) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (= |append_#t~mem60.base| (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (or (< (select |#length| |append_#t~mem60.base|) (+ |append_#t~mem60.offset| 9)) (< (+ |append_#t~mem60.offset| 5) 0)) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2021-11-25 18:57:57,091 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:57:57,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:57:57,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 31 [2021-11-25 18:57:57,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301387782] [2021-11-25 18:57:57,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:57:57,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-25 18:57:57,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:57:57,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-25 18:57:57,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2448, Unknown=1, NotChecked=100, Total=2756 [2021-11-25 18:57:57,094 INFO L87 Difference]: Start difference. First operand 401 states and 536 transitions. Second operand has 32 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 29 states have internal predecessors, (103), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:57:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:57:59,448 INFO L93 Difference]: Finished difference Result 531 states and 581 transitions. [2021-11-25 18:57:59,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:57:59,449 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 29 states have internal predecessors, (103), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2021-11-25 18:57:59,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:57:59,452 INFO L225 Difference]: With dead ends: 531 [2021-11-25 18:57:59,452 INFO L226 Difference]: Without dead ends: 531 [2021-11-25 18:57:59,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=410, Invalid=3625, Unknown=1, NotChecked=124, Total=4160 [2021-11-25 18:57:59,454 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 995 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 3880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1880 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:57:59,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 1388 Invalid, 3880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1880 Invalid, 0 Unknown, 1880 Unchecked, 1.2s Time] [2021-11-25 18:57:59,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-25 18:57:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 382. [2021-11-25 18:57:59,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 247 states have (on average 1.951417004048583) internal successors, (482), 363 states have internal predecessors, (482), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:57:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 514 transitions. [2021-11-25 18:57:59,465 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 514 transitions. Word has length 51 [2021-11-25 18:57:59,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:57:59,465 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 514 transitions. [2021-11-25 18:57:59,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.3225806451612905) internal successors, (103), 29 states have internal predecessors, (103), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:57:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 514 transitions. [2021-11-25 18:57:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-25 18:57:59,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:57:59,469 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:57:59,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:57:59,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 18:57:59,695 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:57:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:57:59,695 INFO L85 PathProgramCache]: Analyzing trace with hash 712114375, now seen corresponding path program 1 times [2021-11-25 18:57:59,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:57:59,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417323093] [2021-11-25 18:57:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:57:59,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:58:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:58:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 331 proven. 576 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2021-11-25 18:58:11,470 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:58:11,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417323093] [2021-11-25 18:58:11,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417323093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:58:11,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826526288] [2021-11-25 18:58:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:58:11,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:58:11,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:58:11,471 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:58:11,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:58:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:58:12,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 2243 conjuncts, 445 conjunts are in the unsatisfiable core [2021-11-25 18:58:12,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:58:12,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:58:12,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:58:12,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:12,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:58:12,602 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:58:12,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 27 [2021-11-25 18:58:12,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:12,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 7 [2021-11-25 18:58:12,683 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:58:12,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 32 [2021-11-25 18:58:12,788 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 18:58:12,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:58:13,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:13,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:13,548 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-25 18:58:13,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 104 [2021-11-25 18:58:13,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:13,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 82 [2021-11-25 18:58:13,585 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-25 18:58:13,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-25 18:58:13,606 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-11-25 18:58:13,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 35 [2021-11-25 18:58:14,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:14,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:14,509 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-25 18:58:14,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 98 treesize of output 101 [2021-11-25 18:58:14,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:14,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 83 [2021-11-25 18:58:14,538 INFO L354 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2021-11-25 18:58:14,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2021-11-25 18:58:14,556 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:58:14,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 45 treesize of output 33 [2021-11-25 18:58:15,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:15,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:15,407 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-25 18:58:15,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 112 treesize of output 111 [2021-11-25 18:58:15,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:15,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 87 [2021-11-25 18:58:15,460 INFO L354 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2021-11-25 18:58:15,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2021-11-25 18:58:15,495 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:58:15,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 45 treesize of output 31 [2021-11-25 18:58:16,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:16,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:16,149 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-25 18:58:16,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 112 treesize of output 111 [2021-11-25 18:58:16,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:16,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 87 [2021-11-25 18:58:16,200 INFO L354 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2021-11-25 18:58:16,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2021-11-25 18:58:16,221 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:58:16,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 45 treesize of output 31 [2021-11-25 18:58:16,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:16,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:16,946 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-25 18:58:16,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 123 treesize of output 120 [2021-11-25 18:58:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:16,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 92 [2021-11-25 18:58:16,977 INFO L354 Elim1Store]: treesize reduction 77, result has 30.6 percent of original size [2021-11-25 18:58:16,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 54 [2021-11-25 18:58:16,994 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:58:16,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 45 treesize of output 33 [2021-11-25 18:58:17,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:17,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:17,643 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-25 18:58:17,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 131 treesize of output 126 [2021-11-25 18:58:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:17,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 96 [2021-11-25 18:58:17,692 INFO L354 Elim1Store]: treesize reduction 107, result has 31.4 percent of original size [2021-11-25 18:58:17,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 72 [2021-11-25 18:58:17,722 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:58:17,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2021-11-25 18:58:18,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:18,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:18,616 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-25 18:58:18,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 141 treesize of output 134 [2021-11-25 18:58:18,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:18,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 100 [2021-11-25 18:58:18,659 INFO L354 Elim1Store]: treesize reduction 107, result has 31.4 percent of original size [2021-11-25 18:58:18,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 43 treesize of output 72 [2021-11-25 18:58:18,682 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:58:18,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2021-11-25 18:58:19,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:19,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:19,662 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-25 18:58:19,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 149 treesize of output 140 [2021-11-25 18:58:19,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:19,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 104 [2021-11-25 18:58:19,727 INFO L354 Elim1Store]: treesize reduction 137, result has 31.8 percent of original size [2021-11-25 18:58:19,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 48 treesize of output 90 [2021-11-25 18:58:19,755 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:58:19,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-11-25 18:58:20,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:20,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:20,800 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-25 18:58:20,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 167 treesize of output 154 [2021-11-25 18:58:20,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:20,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 112 [2021-11-25 18:58:20,935 INFO L354 Elim1Store]: treesize reduction 175, result has 31.1 percent of original size [2021-11-25 18:58:20,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 53 treesize of output 108 [2021-11-25 18:58:20,986 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:58:20,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2021-11-25 18:58:22,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:22,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:22,076 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-25 18:58:22,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 185 treesize of output 168 [2021-11-25 18:58:22,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:22,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 120 [2021-11-25 18:58:22,179 INFO L354 Elim1Store]: treesize reduction 213, result has 30.6 percent of original size [2021-11-25 18:58:22,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 58 treesize of output 126 [2021-11-25 18:58:22,225 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:58:22,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 15 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2021-11-25 18:58:27,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:27,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:27,570 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-25 18:58:27,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 203 treesize of output 182 [2021-11-25 18:58:27,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:27,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 128 [2021-11-25 18:58:27,706 INFO L354 Elim1Store]: treesize reduction 251, result has 30.3 percent of original size [2021-11-25 18:58:27,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 17 case distinctions, treesize of input 63 treesize of output 144 [2021-11-25 18:58:27,761 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:58:27,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2021-11-25 18:58:37,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:37,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:37,575 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-25 18:58:37,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 221 treesize of output 196 [2021-11-25 18:58:37,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:37,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 136 [2021-11-25 18:58:37,751 INFO L354 Elim1Store]: treesize reduction 289, result has 30.0 percent of original size [2021-11-25 18:58:37,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 31 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 68 treesize of output 162 [2021-11-25 18:58:37,812 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:58:37,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 21 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2021-11-25 18:58:53,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:53,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:53,369 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-11-25 18:58:53,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 239 treesize of output 210 [2021-11-25 18:58:53,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:58:53,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 144 [2021-11-25 18:58:53,585 INFO L354 Elim1Store]: treesize reduction 327, result has 29.8 percent of original size [2021-11-25 18:58:53,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 39 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 23 case distinctions, treesize of input 73 treesize of output 180 [2021-11-25 18:58:53,725 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-25 18:58:53,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 24 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 33 [2021-11-25 18:59:21,237 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-25 18:59:21,238 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-25 18:59:21,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876628999] [2021-11-25 18:59:21,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-25 18:59:21,243 INFO L159 IcfgInterpreter]: Started Sifa with 51 locations of interest [2021-11-25 18:59:21,243 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:59:21,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:59:21,244 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:59:21,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:59:21,256 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:312) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:267) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 45 more [2021-11-25 18:59:21,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:59:21,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-11-25 18:59:21,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743343847] [2021-11-25 18:59:21,261 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:59:21,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 18:59:21,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:59:21,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 18:59:21,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=6463, Unknown=114, NotChecked=0, Total=7140 [2021-11-25 18:59:21,264 INFO L87 Difference]: Start difference. First operand 382 states and 514 transitions. Second operand has 48 states, 46 states have (on average 2.239130434782609) internal successors, (103), 44 states have internal predecessors, (103), 4 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-25 18:59:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:59:21,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 192 SyntacticMatches, 80 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=563, Invalid=6463, Unknown=114, NotChecked=0, Total=7140 [2021-11-25 18:59:21,267 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:21,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:59:21,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:21,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 18:59:21,491 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@7f7e6fb8 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:59:21,493 INFO L158 Benchmark]: Toolchain (without parser) took 471775.13ms. Allocated memory was 98.6MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 59.0MB in the beginning and 906.3MB in the end (delta: -847.3MB). Peak memory consumption was 185.5MB. Max. memory is 16.1GB. [2021-11-25 18:59:21,493 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 98.6MB. Free memory is still 76.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:59:21,493 INFO L158 Benchmark]: CACSL2BoogieTranslator took 551.01ms. Allocated memory is still 98.6MB. Free memory was 58.8MB in the beginning and 64.8MB in the end (delta: -6.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-25 18:59:21,493 INFO L158 Benchmark]: Boogie Procedure Inliner took 84.38ms. Allocated memory is still 98.6MB. Free memory was 64.8MB in the beginning and 62.0MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 18:59:21,494 INFO L158 Benchmark]: Boogie Preprocessor took 86.84ms. Allocated memory is still 98.6MB. Free memory was 61.6MB in the beginning and 59.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:59:21,494 INFO L158 Benchmark]: RCFGBuilder took 1017.60ms. Allocated memory is still 98.6MB. Free memory was 58.9MB in the beginning and 52.5MB in the end (delta: 6.4MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. [2021-11-25 18:59:21,494 INFO L158 Benchmark]: TraceAbstraction took 470029.35ms. Allocated memory was 98.6MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 52.0MB in the beginning and 906.3MB in the end (delta: -854.3MB). Peak memory consumption was 179.4MB. Max. memory is 16.1GB. [2021-11-25 18:59:21,495 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 98.6MB. Free memory is still 76.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 551.01ms. Allocated memory is still 98.6MB. Free memory was 58.8MB in the beginning and 64.8MB in the end (delta: -6.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 84.38ms. Allocated memory is still 98.6MB. Free memory was 64.8MB in the beginning and 62.0MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 86.84ms. Allocated memory is still 98.6MB. Free memory was 61.6MB in the beginning and 59.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1017.60ms. Allocated memory is still 98.6MB. Free memory was 58.9MB in the beginning and 52.5MB in the end (delta: 6.4MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. * TraceAbstraction took 470029.35ms. Allocated memory was 98.6MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 52.0MB in the beginning and 906.3MB in the end (delta: -854.3MB). Peak memory consumption was 179.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@7f7e6fb8 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@7f7e6fb8: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7 --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 db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:59:23,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:59:23,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:59:24,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:59:24,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:59:24,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:59:24,056 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:59:24,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:59:24,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:59:24,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:59:24,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:59:24,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:59:24,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:59:24,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:59:24,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:59:24,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:59:24,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:59:24,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:59:24,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:59:24,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:59:24,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:59:24,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:59:24,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:59:24,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:59:24,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:59:24,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:59:24,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:59:24,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:59:24,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:59:24,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:59:24,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:59:24,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:59:24,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:59:24,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:59:24,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:59:24,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:59:24,121 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:59:24,121 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:59:24,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:59:24,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:59:24,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:59:24,125 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 18:59:24,157 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:59:24,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:59:24,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:59:24,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:59:24,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:59:24,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:59:24,160 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:59:24,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:59:24,160 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:59:24,161 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:59:24,161 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:59:24,161 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:59:24,162 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:59:24,162 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:59:24,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:59:24,163 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:59:24,163 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:59:24,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:59:24,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:59:24,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:59:24,164 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:59:24,164 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:59:24,165 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:59:24,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:59:24,165 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:59:24,166 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:59:24,166 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:59:24,166 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:59:24,166 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:59:24,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:59:24,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:59:24,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:59:24,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:59:24,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:59:24,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:59:24,168 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:59:24,169 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:59:24,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:59:24,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:59:24,169 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db322df1d89bf1549765f136e3e3b8000484c0c3108c31998992cf725d6dcc20 [2021-11-25 18:59:24,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:59:24,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:59:24,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:59:24,698 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:59:24,699 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:59:24,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2021-11-25 18:59:24,793 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/data/8b1bd1211/c6a72c392046485db6fba2bffb515504/FLAG7dfa3cc9f [2021-11-25 18:59:25,439 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:59:25,440 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/sv-benchmarks/c/memsafety-ext2/split_list_test05-2.i [2021-11-25 18:59:25,456 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/data/8b1bd1211/c6a72c392046485db6fba2bffb515504/FLAG7dfa3cc9f [2021-11-25 18:59:25,713 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/data/8b1bd1211/c6a72c392046485db6fba2bffb515504 [2021-11-25 18:59:25,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:59:25,720 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:59:25,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:59:25,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:59:25,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:59:25,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:59:25" (1/1) ... [2021-11-25 18:59:25,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@657e686b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:25, skipping insertion in model container [2021-11-25 18:59:25,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:59:25" (1/1) ... [2021-11-25 18:59:25,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:59:25,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:59:26,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:59:26,200 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:59:26,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:59:26,299 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:59:26,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:26 WrapperNode [2021-11-25 18:59:26,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:59:26,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:59:26,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:59:26,302 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:59:26,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:26" (1/1) ... [2021-11-25 18:59:26,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:26" (1/1) ... [2021-11-25 18:59:26,371 INFO L137 Inliner]: procedures = 126, calls = 95, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 292 [2021-11-25 18:59:26,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:59:26,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:59:26,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:59:26,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:59:26,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:26" (1/1) ... [2021-11-25 18:59:26,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:26" (1/1) ... [2021-11-25 18:59:26,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:26" (1/1) ... [2021-11-25 18:59:26,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:26" (1/1) ... [2021-11-25 18:59:26,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:26" (1/1) ... [2021-11-25 18:59:26,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:26" (1/1) ... [2021-11-25 18:59:26,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:26" (1/1) ... [2021-11-25 18:59:26,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:59:26,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:59:26,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:59:26,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:59:26,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:26" (1/1) ... [2021-11-25 18:59:26,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:59:26,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:59:26,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:59:26,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:59:26,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-25 18:59:26,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:59:26,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:59:26,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:59:26,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:59:26,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-25 18:59:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:59:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:59:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:59:26,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:59:26,603 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-25 18:59:26,604 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-25 18:59:26,790 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:59:26,792 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:59:28,335 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:59:28,350 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:59:28,350 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-25 18:59:28,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:59:28 BoogieIcfgContainer [2021-11-25 18:59:28,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:59:28,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:59:28,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:59:28,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:59:28,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:59:25" (1/3) ... [2021-11-25 18:59:28,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3d9480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:59:28, skipping insertion in model container [2021-11-25 18:59:28,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:59:26" (2/3) ... [2021-11-25 18:59:28,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3d9480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:59:28, skipping insertion in model container [2021-11-25 18:59:28,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:59:28" (3/3) ... [2021-11-25 18:59:28,367 INFO L111 eAbstractionObserver]: Analyzing ICFG split_list_test05-2.i [2021-11-25 18:59:28,372 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:59:28,372 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2021-11-25 18:59:28,422 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:59:28,428 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:59:28,428 INFO L340 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2021-11-25 18:59:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand has 320 states, 156 states have (on average 2.16025641025641) internal successors, (337), 305 states have internal predecessors, (337), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:59:28,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 18:59:28,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:28,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 18:59:28,460 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:59:28,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:28,466 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-25 18:59:28,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:59:28,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203693246] [2021-11-25 18:59:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:28,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:59:28,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:59:28,480 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:59:28,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:59:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:28,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:59:28,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:28,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:28,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:59:28,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:59:28,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203693246] [2021-11-25 18:59:28,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203693246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:28,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:28,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:59:28,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191842900] [2021-11-25 18:59:28,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:28,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:59:28,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:59:28,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:59:28,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:59:28,726 INFO L87 Difference]: Start difference. First operand has 320 states, 156 states have (on average 2.16025641025641) internal successors, (337), 305 states have internal predecessors, (337), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:59:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:29,754 INFO L93 Difference]: Finished difference Result 545 states and 598 transitions. [2021-11-25 18:59:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:59:29,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-25 18:59:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:29,783 INFO L225 Difference]: With dead ends: 545 [2021-11-25 18:59:29,789 INFO L226 Difference]: Without dead ends: 543 [2021-11-25 18:59:29,791 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:59:29,795 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 246 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:29,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 443 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 18:59:29,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-25 18:59:29,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 404. [2021-11-25 18:59:29,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 243 states have (on average 2.102880658436214) internal successors, (511), 389 states have internal predecessors, (511), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:59:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 541 transitions. [2021-11-25 18:59:29,940 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 541 transitions. Word has length 3 [2021-11-25 18:59:29,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:29,942 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 541 transitions. [2021-11-25 18:59:29,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:59:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 541 transitions. [2021-11-25 18:59:29,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 18:59:29,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:29,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 18:59:29,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-25 18:59:30,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:59:30,163 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:59:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-25 18:59:30,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:59:30,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708122626] [2021-11-25 18:59:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:30,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:59:30,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:59:30,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:59:30,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:59:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:30,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:59:30,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:30,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:30,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:59:30,298 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:59:30,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708122626] [2021-11-25 18:59:30,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708122626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:30,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:30,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:59:30,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259112171] [2021-11-25 18:59:30,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:30,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:59:30,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:59:30,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:59:30,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:59:30,303 INFO L87 Difference]: Start difference. First operand 404 states and 541 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:59:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:31,087 INFO L93 Difference]: Finished difference Result 405 states and 544 transitions. [2021-11-25 18:59:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:59:31,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-25 18:59:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:31,092 INFO L225 Difference]: With dead ends: 405 [2021-11-25 18:59:31,092 INFO L226 Difference]: Without dead ends: 405 [2021-11-25 18:59:31,092 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:59:31,094 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 6 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:31,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 561 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 18:59:31,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-25 18:59:31,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 402. [2021-11-25 18:59:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 243 states have (on average 2.094650205761317) internal successors, (509), 387 states have internal predecessors, (509), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:59:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 539 transitions. [2021-11-25 18:59:31,135 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 539 transitions. Word has length 3 [2021-11-25 18:59:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:31,136 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 539 transitions. [2021-11-25 18:59:31,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:59:31,137 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 539 transitions. [2021-11-25 18:59:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:59:31,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:31,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:31,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-25 18:59:31,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:59:31,348 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:59:31,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:31,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1117383211, now seen corresponding path program 1 times [2021-11-25 18:59:31,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:59:31,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286961670] [2021-11-25 18:59:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:31,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:59:31,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:59:31,351 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:59:31,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 18:59:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:31,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:59:31,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:31,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:31,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:59:31,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:59:31,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286961670] [2021-11-25 18:59:31,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286961670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:31,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:31,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:59:31,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292545818] [2021-11-25 18:59:31,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:31,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:59:31,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:59:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:59:31,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:59:31,489 INFO L87 Difference]: Start difference. First operand 402 states and 539 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-25 18:59:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:31,911 INFO L93 Difference]: Finished difference Result 397 states and 534 transitions. [2021-11-25 18:59:31,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:59:31,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2021-11-25 18:59:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:31,915 INFO L225 Difference]: With dead ends: 397 [2021-11-25 18:59:31,915 INFO L226 Difference]: Without dead ends: 397 [2021-11-25 18:59:31,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:59:31,917 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 43 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:31,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 490 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:59:31,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-25 18:59:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2021-11-25 18:59:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 243 states have (on average 2.074074074074074) internal successors, (504), 382 states have internal predecessors, (504), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:59:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 534 transitions. [2021-11-25 18:59:31,935 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 534 transitions. Word has length 10 [2021-11-25 18:59:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:31,935 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 534 transitions. [2021-11-25 18:59:31,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-25 18:59:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 534 transitions. [2021-11-25 18:59:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 18:59:31,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:31,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:31,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:32,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:59:32,151 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:59:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1117383212, now seen corresponding path program 1 times [2021-11-25 18:59:32,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:59:32,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908264288] [2021-11-25 18:59:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:32,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:59:32,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:59:32,161 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:59:32,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 18:59:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:32,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:59:32,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:32,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:32,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:59:32,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:59:32,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908264288] [2021-11-25 18:59:32,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908264288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:32,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:32,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:59:32,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398425161] [2021-11-25 18:59:32,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:32,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:59:32,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:59:32,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:59:32,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:59:32,321 INFO L87 Difference]: Start difference. First operand 397 states and 534 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-25 18:59:32,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:32,970 INFO L93 Difference]: Finished difference Result 392 states and 529 transitions. [2021-11-25 18:59:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:59:32,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2021-11-25 18:59:32,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:32,974 INFO L225 Difference]: With dead ends: 392 [2021-11-25 18:59:32,974 INFO L226 Difference]: Without dead ends: 392 [2021-11-25 18:59:32,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:59:32,976 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 38 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:32,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 503 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 18:59:32,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-25 18:59:32,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2021-11-25 18:59:32,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 243 states have (on average 2.0534979423868314) internal successors, (499), 377 states have internal predecessors, (499), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-25 18:59:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 529 transitions. [2021-11-25 18:59:32,994 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 529 transitions. Word has length 10 [2021-11-25 18:59:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:32,994 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 529 transitions. [2021-11-25 18:59:32,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-11-25 18:59:32,995 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 529 transitions. [2021-11-25 18:59:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:59:32,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:32,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:33,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:33,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:59:33,211 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:59:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:33,212 INFO L85 PathProgramCache]: Analyzing trace with hash 279141591, now seen corresponding path program 1 times [2021-11-25 18:59:33,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:59:33,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890341658] [2021-11-25 18:59:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:33,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:59:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:59:33,216 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:59:33,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 18:59:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:33,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:59:33,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:33,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:33,485 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 18:59:33,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 24 [2021-11-25 18:59:33,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:33,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:59:33,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:59:33,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890341658] [2021-11-25 18:59:33,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890341658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:33,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:33,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:59:33,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311599314] [2021-11-25 18:59:33,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:33,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:59:33,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:59:33,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:59:33,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:59:33,565 INFO L87 Difference]: Start difference. First operand 392 states and 529 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-25 18:59:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:34,447 INFO L93 Difference]: Finished difference Result 534 states and 588 transitions. [2021-11-25 18:59:34,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:59:34,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2021-11-25 18:59:34,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:34,451 INFO L225 Difference]: With dead ends: 534 [2021-11-25 18:59:34,451 INFO L226 Difference]: Without dead ends: 534 [2021-11-25 18:59:34,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:59:34,452 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 239 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:34,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 803 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 398 Invalid, 0 Unknown, 252 Unchecked, 0.8s Time] [2021-11-25 18:59:34,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-25 18:59:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 398. [2021-11-25 18:59:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 248 states have (on average 2.0403225806451615) internal successors, (506), 382 states have internal predecessors, (506), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:59:34,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 538 transitions. [2021-11-25 18:59:34,468 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 538 transitions. Word has length 11 [2021-11-25 18:59:34,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:34,469 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 538 transitions. [2021-11-25 18:59:34,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-25 18:59:34,469 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 538 transitions. [2021-11-25 18:59:34,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:59:34,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:34,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:34,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-25 18:59:34,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:59:34,689 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:59:34,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash 279141592, now seen corresponding path program 1 times [2021-11-25 18:59:34,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:59:34,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997876336] [2021-11-25 18:59:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:34,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:59:34,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:59:34,691 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:59:34,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 18:59:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:34,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 18:59:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:34,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:34,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:34,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:34,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:35,001 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:59:35,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-25 18:59:35,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:35,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:59:35,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:59:35,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997876336] [2021-11-25 18:59:35,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997876336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:35,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:35,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:59:35,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553606403] [2021-11-25 18:59:35,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:35,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:59:35,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:59:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:59:35,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:59:35,038 INFO L87 Difference]: Start difference. First operand 398 states and 538 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-25 18:59:37,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:37,116 INFO L93 Difference]: Finished difference Result 524 states and 577 transitions. [2021-11-25 18:59:37,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:59:37,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2021-11-25 18:59:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:37,121 INFO L225 Difference]: With dead ends: 524 [2021-11-25 18:59:37,121 INFO L226 Difference]: Without dead ends: 524 [2021-11-25 18:59:37,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:59:37,124 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 312 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:37,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 436 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 18:59:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-25 18:59:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 389. [2021-11-25 18:59:37,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 248 states have (on average 1.9959677419354838) internal successors, (495), 373 states have internal predecessors, (495), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:59:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 527 transitions. [2021-11-25 18:59:37,150 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 527 transitions. Word has length 11 [2021-11-25 18:59:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:37,151 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 527 transitions. [2021-11-25 18:59:37,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-25 18:59:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 527 transitions. [2021-11-25 18:59:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:59:37,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:37,153 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:37,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:37,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:59:37,369 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:59:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:37,370 INFO L85 PathProgramCache]: Analyzing trace with hash 850870575, now seen corresponding path program 1 times [2021-11-25 18:59:37,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:59:37,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38156989] [2021-11-25 18:59:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:37,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:59:37,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:59:37,371 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:59:37,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 18:59:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:37,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:59:37,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:37,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:59:37,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:59:37,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38156989] [2021-11-25 18:59:37,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38156989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:37,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:37,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:59:37,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271901525] [2021-11-25 18:59:37,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:37,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:59:37,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:59:37,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:59:37,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:59:37,492 INFO L87 Difference]: Start difference. First operand 389 states and 527 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-11-25 18:59:37,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:37,888 INFO L93 Difference]: Finished difference Result 383 states and 521 transitions. [2021-11-25 18:59:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:59:37,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 14 [2021-11-25 18:59:37,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:37,891 INFO L225 Difference]: With dead ends: 383 [2021-11-25 18:59:37,892 INFO L226 Difference]: Without dead ends: 383 [2021-11-25 18:59:37,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:59:37,892 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 20 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:37,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 483 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:59:37,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-25 18:59:37,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2021-11-25 18:59:37,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 248 states have (on average 1.971774193548387) internal successors, (489), 367 states have internal predecessors, (489), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:59:37,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 521 transitions. [2021-11-25 18:59:37,909 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 521 transitions. Word has length 14 [2021-11-25 18:59:37,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:37,909 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 521 transitions. [2021-11-25 18:59:37,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-11-25 18:59:37,910 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 521 transitions. [2021-11-25 18:59:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:59:37,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:37,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:37,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:38,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:59:38,122 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:59:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:38,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1241205510, now seen corresponding path program 1 times [2021-11-25 18:59:38,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:59:38,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281381407] [2021-11-25 18:59:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:38,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:59:38,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:59:38,126 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:59:38,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 18:59:38,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:38,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 18:59:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:38,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:38,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:38,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:38,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:38,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:38,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:59:38,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:38,543 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:59:38,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2021-11-25 18:59:38,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:59:38,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 18:59:38,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:38,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:38,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:59:38,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:59:38,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281381407] [2021-11-25 18:59:38,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281381407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:38,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:38,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 18:59:38,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677153912] [2021-11-25 18:59:38,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:38,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:59:38,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:59:38,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:59:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:59:38,712 INFO L87 Difference]: Start difference. First operand 383 states and 521 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-11-25 18:59:40,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:40,089 INFO L93 Difference]: Finished difference Result 397 states and 536 transitions. [2021-11-25 18:59:40,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:59:40,089 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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 20 [2021-11-25 18:59:40,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:40,093 INFO L225 Difference]: With dead ends: 397 [2021-11-25 18:59:40,093 INFO L226 Difference]: Without dead ends: 397 [2021-11-25 18:59:40,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:59:40,094 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 25 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:40,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 1840 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 18:59:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-25 18:59:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 385. [2021-11-25 18:59:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 250 states have (on average 1.964) internal successors, (491), 369 states have internal predecessors, (491), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:59:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 523 transitions. [2021-11-25 18:59:40,118 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 523 transitions. Word has length 20 [2021-11-25 18:59:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:40,120 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 523 transitions. [2021-11-25 18:59:40,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-11-25 18:59:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 523 transitions. [2021-11-25 18:59:40,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 18:59:40,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:40,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:40,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:40,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:59:40,337 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:59:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:40,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1158865353, now seen corresponding path program 1 times [2021-11-25 18:59:40,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:59:40,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567775660] [2021-11-25 18:59:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:40,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:59:40,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:59:40,341 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:59:40,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 18:59:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:40,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 18:59:40,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:40,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:40,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:40,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:40,660 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:59:40,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 26 [2021-11-25 18:59:40,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:40,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:40,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2021-11-25 18:59:40,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2021-11-25 18:59:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:40,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:59:40,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:59:40,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567775660] [2021-11-25 18:59:40,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567775660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:59:40,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:59:40,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 18:59:40,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804433119] [2021-11-25 18:59:40,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:59:40,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:59:40,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:59:40,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:59:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:59:40,842 INFO L87 Difference]: Start difference. First operand 385 states and 523 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-11-25 18:59:42,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:42,807 INFO L93 Difference]: Finished difference Result 525 states and 578 transitions. [2021-11-25 18:59:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 18:59:42,808 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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 22 [2021-11-25 18:59:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:42,811 INFO L225 Difference]: With dead ends: 525 [2021-11-25 18:59:42,812 INFO L226 Difference]: Without dead ends: 525 [2021-11-25 18:59:42,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:59:42,813 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 249 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:42,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1364 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 18:59:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-11-25 18:59:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 388. [2021-11-25 18:59:42,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 253 states have (on average 1.9525691699604744) internal successors, (494), 372 states have internal predecessors, (494), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:59:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 526 transitions. [2021-11-25 18:59:42,830 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 526 transitions. Word has length 22 [2021-11-25 18:59:42,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:42,830 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 526 transitions. [2021-11-25 18:59:42,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-11-25 18:59:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 526 transitions. [2021-11-25 18:59:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 18:59:42,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:42,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:42,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:43,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:59:43,045 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:59:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:43,045 INFO L85 PathProgramCache]: Analyzing trace with hash 658659821, now seen corresponding path program 1 times [2021-11-25 18:59:43,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:59:43,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168356497] [2021-11-25 18:59:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:43,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:59:43,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:59:43,047 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:59:43,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 18:59:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:43,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:59:43,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:43,386 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 18:59:43,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-25 18:59:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:43,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:59:43,611 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:59:43,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 17 [2021-11-25 18:59:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:43,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:59:43,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168356497] [2021-11-25 18:59:43,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168356497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:59:43,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [861995896] [2021-11-25 18:59:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:43,638 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:59:43,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:59:43,642 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:59:43,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-25 18:59:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:43,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:59:43,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:44,020 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 18:59:44,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-25 18:59:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:44,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:59:44,158 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:59:44,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 17 [2021-11-25 18:59:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:44,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [861995896] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:59:44,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919113369] [2021-11-25 18:59:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:44,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:59:44,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:59:44,197 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:59:44,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:59:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:44,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:59:44,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:44,394 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 18:59:44,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 29 [2021-11-25 18:59:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:44,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:59:44,537 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 18:59:44,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 17 [2021-11-25 18:59:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:44,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919113369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:59:44,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:59:44,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 6 [2021-11-25 18:59:44,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067488059] [2021-11-25 18:59:44,557 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:59:44,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:59:44,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:59:44,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:59:44,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:59:44,560 INFO L87 Difference]: Start difference. First operand 388 states and 526 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:59:45,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:59:45,718 INFO L93 Difference]: Finished difference Result 522 states and 575 transitions. [2021-11-25 18:59:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:59:45,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-25 18:59:45,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:59:45,722 INFO L225 Difference]: With dead ends: 522 [2021-11-25 18:59:45,722 INFO L226 Difference]: Without dead ends: 522 [2021-11-25 18:59:45,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 134 SyntacticMatches, 17 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:59:45,724 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 307 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:59:45,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 789 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 18:59:45,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-25 18:59:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 387. [2021-11-25 18:59:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 253 states have (on average 1.948616600790514) internal successors, (493), 371 states have internal predecessors, (493), 16 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 18:59:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 525 transitions. [2021-11-25 18:59:45,740 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 525 transitions. Word has length 27 [2021-11-25 18:59:45,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:59:45,741 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 525 transitions. [2021-11-25 18:59:45,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:59:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 525 transitions. [2021-11-25 18:59:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 18:59:45,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:59:45,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:59:45,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-25 18:59:45,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:46,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:59:46,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:59:46,367 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 18:59:46,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:59:46,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1480107696, now seen corresponding path program 1 times [2021-11-25 18:59:46,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:59:46,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865913393] [2021-11-25 18:59:46,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:46,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:59:46,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:59:46,369 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:59:46,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 18:59:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:46,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 18:59:46,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:46,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:47,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:47,120 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:59:47,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 18:59:47,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:59:47,206 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:59:47,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 18:59:47,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:59:47,428 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 18:59:47,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 36 [2021-11-25 18:59:47,638 INFO L354 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2021-11-25 18:59:47,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 70 [2021-11-25 18:59:47,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 43 [2021-11-25 18:59:47,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 43 [2021-11-25 18:59:48,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 43 [2021-11-25 18:59:48,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 20 [2021-11-25 18:59:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:48,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:59:48,615 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_36 (_ BitVec 32)) (v_ArrVal_439 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_436 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_36)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_36 v_ArrVal_436) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_36 v_ArrVal_439) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))))))))))) (_ bv1 1))))) is different from false [2021-11-25 18:59:48,641 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_36 (_ BitVec 32)) (v_ArrVal_439 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_436 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_36))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_36 v_ArrVal_436) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_36 v_ArrVal_439) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))))))))))))) (_ bv1 1))))) is different from false [2021-11-25 18:59:48,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:59:48,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 47 [2021-11-25 18:59:48,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 444 treesize of output 318 [2021-11-25 18:59:48,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 286 treesize of output 278 [2021-11-25 18:59:48,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 262 [2021-11-25 18:59:53,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:59:53,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865913393] [2021-11-25 18:59:53,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865913393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:59:53,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [495042314] [2021-11-25 18:59:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:53,121 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:59:53,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:59:53,123 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:59:53,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-25 18:59:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:53,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-25 18:59:53,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:53,802 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 18:59:53,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 19 [2021-11-25 18:59:54,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:54,364 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:59:54,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 18:59:54,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:59:54,446 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:59:54,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 18:59:54,688 INFO L354 Elim1Store]: treesize reduction 130, result has 19.3 percent of original size [2021-11-25 18:59:54,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 67 treesize of output 87 [2021-11-25 18:59:54,758 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-11-25 18:59:54,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 53 [2021-11-25 18:59:55,124 INFO L354 Elim1Store]: treesize reduction 65, result has 40.9 percent of original size [2021-11-25 18:59:55,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 86 [2021-11-25 18:59:55,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 39 [2021-11-25 18:59:55,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 39 [2021-11-25 18:59:55,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 41 [2021-11-25 18:59:56,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 26 [2021-11-25 18:59:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:59:56,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:59:56,156 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_524 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_524) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32)))))))) (_ bv1 1)))) is different from false [2021-11-25 18:59:56,173 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_524 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_524) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))))))) (_ bv1 1)))) is different from false [2021-11-25 18:59:56,225 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_521 (_ BitVec 1)) (v_append_~node~0.base_40 (_ BitVec 32)) (v_ArrVal_524 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_40 v_ArrVal_521) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_40 v_ArrVal_524) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_40)))))) is different from false [2021-11-25 18:59:56,255 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_521 (_ BitVec 1)) (v_append_~node~0.base_40 (_ BitVec 32)) (v_ArrVal_524 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_40)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_40 v_ArrVal_521) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_40 v_ArrVal_524) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))))))))))) (_ bv1 1))))) is different from false [2021-11-25 18:59:56,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:59:56,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 46 [2021-11-25 18:59:56,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 435 treesize of output 309 [2021-11-25 18:59:56,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 262 [2021-11-25 18:59:56,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 135 treesize of output 127 [2021-11-25 18:59:58,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [495042314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:59:58,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532899859] [2021-11-25 18:59:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:59:58,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:59:58,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:59:58,594 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:59:58,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 18:59:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:59:58,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-25 18:59:58,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:59:58,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:59,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 18:59:59,608 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:59:59,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 18:59:59,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 18:59:59,777 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 18:59:59,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 18:59:59,982 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-25 18:59:59,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 51 treesize of output 49 [2021-11-25 19:00:00,299 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-11-25 19:00:00,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 62 [2021-11-25 19:00:00,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 39 [2021-11-25 19:00:00,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 39 [2021-11-25 19:00:00,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 37 treesize of output 35 [2021-11-25 19:00:01,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 18 [2021-11-25 19:00:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:01,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:01,201 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_607 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_607) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))))))) (_ bv1 1)))) is different from false [2021-11-25 19:00:01,269 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_604 (_ BitVec 1)) (v_ArrVal_607 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_44 (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_44 v_ArrVal_604) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_44 v_ArrVal_607) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))))))) (not (= (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_44)))))) (_ bv0 1))))) is different from false [2021-11-25 19:00:01,309 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_604 (_ BitVec 1)) (v_ArrVal_607 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_44 (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_44 v_ArrVal_604) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_44 v_ArrVal_607) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)))))))))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_44))))))))))) is different from false [2021-11-25 19:00:01,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:00:01,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 40 [2021-11-25 19:00:01,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:00:01,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 97 treesize of output 67 [2021-11-25 19:00:01,508 INFO L354 Elim1Store]: treesize reduction 43, result has 29.5 percent of original size [2021-11-25 19:00:01,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 129 [2021-11-25 19:00:01,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 54 treesize of output 42 [2021-11-25 19:00:01,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:00:01,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 41 [2021-11-25 19:00:01,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:00:01,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 260 treesize of output 257 [2021-11-25 19:00:01,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 238 treesize of output 222 [2021-11-25 19:00:01,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 222 treesize of output 214 [2021-11-25 19:00:43,222 INFO L354 Elim1Store]: treesize reduction -18, result has 114.9 percent of original size [2021-11-25 19:00:43,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 170 treesize of output 296 [2021-11-25 19:00:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-25 19:00:49,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532899859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:49,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-25 19:00:49,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 14, 13] total 42 [2021-11-25 19:00:49,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832443042] [2021-11-25 19:00:49,157 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:49,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 19:00:49,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:00:49,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 19:00:49,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1530, Unknown=17, NotChecked=792, Total=2550 [2021-11-25 19:00:49,160 INFO L87 Difference]: Start difference. First operand 387 states and 525 transitions. Second operand has 43 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 37 states have internal predecessors, (118), 7 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:00:52,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:52,339 INFO L93 Difference]: Finished difference Result 543 states and 619 transitions. [2021-11-25 19:00:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 19:00:52,340 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 37 states have internal predecessors, (118), 7 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2021-11-25 19:00:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:52,346 INFO L225 Difference]: With dead ends: 543 [2021-11-25 19:00:52,346 INFO L226 Difference]: Without dead ends: 543 [2021-11-25 19:00:52,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 91 SyntacticMatches, 39 SemanticMatches, 53 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=262, Invalid=1811, Unknown=33, NotChecked=864, Total=2970 [2021-11-25 19:00:52,348 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 299 mSDsluCounter, 3989 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 4180 SdHoareTripleChecker+Invalid, 3988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2525 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:52,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 4180 Invalid, 3988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1420 Invalid, 0 Unknown, 2525 Unchecked, 2.3s Time] [2021-11-25 19:00:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-25 19:00:52,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 406. [2021-11-25 19:00:52,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 269 states have (on average 1.9107806691449813) internal successors, (514), 388 states have internal predecessors, (514), 18 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (35), 16 states have call predecessors, (35), 18 states have call successors, (35) [2021-11-25 19:00:52,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 567 transitions. [2021-11-25 19:00:52,370 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 567 transitions. Word has length 36 [2021-11-25 19:00:52,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:52,370 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 567 transitions. [2021-11-25 19:00:52,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 37 states have internal predecessors, (118), 7 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:00:52,371 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 567 transitions. [2021-11-25 19:00:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:00:52,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:52,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:52,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:52,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:52,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:52,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:00:52,988 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 19:00:52,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:52,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1480107697, now seen corresponding path program 1 times [2021-11-25 19:00:52,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:00:52,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205877694] [2021-11-25 19:00:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:52,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:00:52,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:00:52,991 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:00:52,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 19:00:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:53,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 19:00:53,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:53,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:00:53,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:00:53,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:00:53,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:00:53,620 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:00:53,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 19:00:53,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 19:00:53,665 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:00:53,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 19:00:53,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 19:00:53,776 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:00:53,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 19:00:53,798 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:00:53,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 19:00:53,961 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-25 19:00:53,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 23 [2021-11-25 19:00:54,124 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-25 19:00:54,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-11-25 19:00:54,141 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:00:54,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 23 [2021-11-25 19:00:54,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:00:54,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 28 [2021-11-25 19:00:54,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 28 [2021-11-25 19:00:54,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:00:54,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 28 [2021-11-25 19:00:54,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:00:54,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 13 [2021-11-25 19:00:54,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2021-11-25 19:00:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:54,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:54,793 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_696 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_697 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd c_append_~head.offset (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_696) c_append_~head.base) .cse0) (_ bv9 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_697) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_696 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_696) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))) (bvule (bvadd .cse1 (_ bv5 32)) (bvadd .cse1 (_ bv9 32)))))) is different from false [2021-11-25 19:00:57,061 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_49 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_49))))) (and (forall ((v_ArrVal_696 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_49 v_ArrVal_696) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))) (bvule (bvadd (_ bv5 32) .cse0) (bvadd .cse0 (_ bv9 32))))) (forall ((v_ArrVal_696 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_697 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv4 32) |c_append_#in~head.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_49 v_ArrVal_696) |c_append_#in~head.base|) .cse1) (_ bv9 32)) (select (store |c_#length| v_append_~node~0.base_49 (_ bv9 32)) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_49 v_ArrVal_697) |c_append_#in~head.base|) .cse1)))))))) is different from false [2021-11-25 19:00:58,281 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_49 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_49))))) (and (forall ((v_ArrVal_696 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_49 v_ArrVal_696) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)))) (bvule (bvadd .cse0 (_ bv5 32)) (bvadd .cse0 (_ bv9 32))))) (forall ((v_ArrVal_696 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_697 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_49 v_ArrVal_696) |c_ULTIMATE.start_main_~list~0#1.base|) .cse1) (_ bv9 32)) (select (store |c_#length| v_append_~node~0.base_49 (_ bv9 32)) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_49 v_ArrVal_697) |c_ULTIMATE.start_main_~list~0#1.base|) .cse1)))))))) is different from false [2021-11-25 19:00:58,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:00:58,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 109 treesize of output 110 [2021-11-25 19:00:58,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:00:58,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 153 treesize of output 141 [2021-11-25 19:00:58,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:00:58,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 141 treesize of output 111 [2021-11-25 19:00:58,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:00:58,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 170 treesize of output 140 [2021-11-25 19:00:58,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 198 treesize of output 186 [2021-11-25 19:00:58,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 115 treesize of output 91 [2021-11-25 19:00:58,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 67 [2021-11-25 19:00:58,710 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:00:58,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 20 [2021-11-25 19:00:59,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:00:59,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 87 [2021-11-25 19:00:59,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:00:59,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 87 treesize of output 87 [2021-11-25 19:00:59,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:00:59,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 189 treesize of output 192 [2021-11-25 19:00:59,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:00:59,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 659 treesize of output 620 [2021-11-25 19:00:59,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 581 treesize of output 565 [2021-11-25 19:00:59,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 565 treesize of output 533 [2021-11-25 19:00:59,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 533 treesize of output 517 [2021-11-25 19:00:59,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 517 treesize of output 485 [2021-11-25 19:00:59,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 485 treesize of output 469 [2021-11-25 19:00:59,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 469 treesize of output 437 [2021-11-25 19:01:09,189 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:01:09,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 17 [2021-11-25 19:01:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-25 19:01:13,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:01:13,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205877694] [2021-11-25 19:01:13,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205877694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:01:13,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [907863910] [2021-11-25 19:01:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:13,800 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:01:13,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:01:13,810 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:01:13,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-25 19:01:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:14,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 19:01:14,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:14,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:14,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:15,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:15,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:15,550 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:01:15,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 19:01:15,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 19:01:15,624 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:01:15,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 19:01:15,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 19:01:15,833 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:01:15,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 19:01:15,871 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:01:15,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 19:01:16,298 INFO L354 Elim1Store]: treesize reduction 75, result has 15.7 percent of original size [2021-11-25 19:01:16,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 88 [2021-11-25 19:01:16,386 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-25 19:01:16,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 28 [2021-11-25 19:01:16,800 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-25 19:01:16,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2021-11-25 19:01:16,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 18 [2021-11-25 19:01:16,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 30 [2021-11-25 19:01:16,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:17,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 30 [2021-11-25 19:01:17,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:17,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:17,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 30 [2021-11-25 19:01:17,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 19:01:17,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:01:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:17,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:17,529 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_796 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_796) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))) (bvule (bvadd .cse0 (_ bv5 32)) (bvadd .cse0 (_ bv9 32))))) (forall ((v_ArrVal_796 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_797 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd c_append_~head.offset (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_796) c_append_~head.base) .cse1) (_ bv9 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_797) c_append_~head.base) .cse1)))))) is different from false [2021-11-25 19:01:32,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:32,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 109 treesize of output 110 [2021-11-25 19:01:32,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:32,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 153 treesize of output 141 [2021-11-25 19:01:32,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:32,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 141 treesize of output 111 [2021-11-25 19:01:32,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:32,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 170 treesize of output 140 [2021-11-25 19:01:32,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:32,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 580 treesize of output 564 [2021-11-25 19:01:32,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 564 treesize of output 448 [2021-11-25 19:01:32,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 448 treesize of output 392 [2021-11-25 19:01:41,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [907863910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:01:41,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015092825] [2021-11-25 19:01:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:01:41,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:01:41,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:01:41,003 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:01:41,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 19:01:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:01:41,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-25 19:01:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:01:41,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:41,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:42,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:42,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:42,314 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:01:42,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 19:01:42,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 19:01:42,382 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:01:42,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 19:01:42,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 19:01:42,634 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:01:42,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 19:01:42,671 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:01:42,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 19:01:43,019 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-25 19:01:43,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 76 treesize of output 74 [2021-11-25 19:01:43,492 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-25 19:01:43,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 41 [2021-11-25 19:01:43,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 18 [2021-11-25 19:01:43,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 30 [2021-11-25 19:01:43,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:43,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 19:01:43,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 30 [2021-11-25 19:01:44,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 30 [2021-11-25 19:01:44,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:01:44,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 17 [2021-11-25 19:01:44,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 7 [2021-11-25 19:01:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:01:44,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:01:44,463 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_893 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_894 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd c_append_~head.offset (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_893) c_append_~head.base) .cse0) (_ bv9 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_894) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_893 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_893) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))) (bvule (bvadd .cse1 (_ bv5 32)) (bvadd .cse1 (_ bv9 32)))))) is different from false [2021-11-25 19:01:46,679 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_58 (_ BitVec 32))) (or (and (forall ((v_ArrVal_893 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_894 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv4 32) |c_append_#in~head.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_58 v_ArrVal_893) |c_append_#in~head.base|) .cse0) (_ bv9 32)) (select (store |c_#length| v_append_~node~0.base_58 (_ bv9 32)) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_58 v_ArrVal_894) |c_append_#in~head.base|) .cse0))))) (forall ((v_ArrVal_893 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_58 v_ArrVal_893) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))) (bvule (bvadd (_ bv5 32) .cse1) (bvadd .cse1 (_ bv9 32)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_58)))))) is different from false [2021-11-25 19:01:52,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:52,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 109 treesize of output 110 [2021-11-25 19:01:52,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:52,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 153 treesize of output 141 [2021-11-25 19:01:52,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:01:52,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 141 treesize of output 111 [2021-11-25 19:01:52,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:52,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 170 treesize of output 140 [2021-11-25 19:01:52,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:01:52,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 198 treesize of output 186 [2021-11-25 19:01:52,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 115 treesize of output 91 [2021-11-25 19:01:52,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 67 [2021-11-25 19:01:52,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:01:52,750 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:01:52,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 30 [2021-11-25 19:02:00,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:00,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 87 [2021-11-25 19:02:00,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:00,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 87 treesize of output 87 [2021-11-25 19:02:00,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:00,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 335 treesize of output 332 [2021-11-25 19:02:00,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:02:00,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1979 treesize of output 1868 [2021-11-25 19:02:00,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1829 treesize of output 1765 [2021-11-25 19:02:00,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1765 treesize of output 1701 [2021-11-25 19:02:00,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1701 treesize of output 1573 [2021-11-25 19:02:00,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1573 treesize of output 1445 [2021-11-25 19:02:00,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1445 treesize of output 1413 [2021-11-25 19:02:00,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1413 treesize of output 1397 [2021-11-25 19:02:00,427 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-25 19:02:00,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:02:00,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2021-11-25 19:02:00,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778480156] [2021-11-25 19:02:00,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:02:00,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 19:02:00,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:02:00,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 19:02:00,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1778, Unknown=69, NotChecked=558, Total=2652 [2021-11-25 19:02:00,431 INFO L87 Difference]: Start difference. First operand 406 states and 567 transitions. Second operand has 35 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 30 states have internal predecessors, (90), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:03:11,186 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse7 (bvadd c_append_~head.offset (_ bv4 32))) (.cse2 (bvadd (_ bv4 32) |c_append_#in~head.offset|)) (.cse11 (select |c_#memory_$Pointer$.base| c_append_~head.base))) (let ((.cse6 (select |c_#memory_$Pointer$.offset| c_append_~head.base)) (.cse5 (bvneg (select |c_old(#valid)| c_append_~node~0.base))) (.cse1 (select .cse11 (_ bv4 32))) (.cse9 (select (select |c_#memory_$Pointer$.base| |c_append_#in~head.base|) .cse2)) (.cse8 (select .cse11 .cse7))) (and (not (= c_append_~head.base c_append_~node~0.base)) (= |c_append_#in~head.base| c_append_~head.base) (forall ((v_ArrVal_696 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_697 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd c_append_~head.offset (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_696) c_append_~head.base) .cse0) (_ bv9 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_697) c_append_~head.base) .cse0))))) (not (= .cse1 c_append_~head.base)) (= (select (select |c_#memory_$Pointer$.offset| |c_append_#in~head.base|) .cse2) (_ bv0 32)) (= c_append_~node~0.offset (_ bv0 32)) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |c_append_#in~head.base|))))) (_ bv1 1)))) (forall ((v_append_~node~0.base_49 (_ BitVec 32))) (or (and (forall ((v_ArrVal_696 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_689 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select (store (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_689) v_append_~node~0.base_49 v_ArrVal_696) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))) (bvule (bvadd (_ bv5 32) .cse3) (bvadd .cse3 (_ bv9 32))))) (forall ((v_ArrVal_696 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_697 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_690 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_689 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (bvadd (_ bv4 32) |c_append_#in~head.offset|))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_689) v_append_~node~0.base_49 v_ArrVal_696) |c_append_#in~head.base|) .cse4) (_ bv9 32)) (select (store |c_#length| v_append_~node~0.base_49 (_ bv9 32)) (select (select (store (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_690) v_append_~node~0.base_49 v_ArrVal_697) |c_append_#in~head.base|) .cse4)))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_49)))))))) (= (_ bv0 1) .cse5) (not (= .cse1 c_append_~node~0.base)) (= (_ bv0 32) (select .cse6 (_ bv4 32))) (= (select .cse6 .cse7) (_ bv0 32)) (not (= .cse8 c_append_~head.base)) (= (_ bv0 1) (bvneg (bvneg .cse5))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |c_append_#in~head.base|))))))) (_ bv1 1))) (not (= |c_append_#in~head.base| .cse9)) (= c_append_~head.offset |c_append_#in~head.offset|) (= (_ bv9 32) (select |c_#length| .cse1)) (= (select |c_#length| .cse9) (_ bv9 32)) (exists ((v_ArrVal_780 (_ BitVec 1))) (and (= (_ bv0 1) (bvadd (bvneg v_ArrVal_780) (_ bv1 1))) (= |c_#valid| (store |c_old(#valid)| c_append_~node~0.base v_ArrVal_780)))) (= c_append_~head.offset (_ bv0 32)) (= (select |c_#length| .cse8) (_ bv9 32)) (forall ((v_ArrVal_696 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse10 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_696) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))) (bvule (bvadd .cse10 (_ bv5 32)) (bvadd .cse10 (_ bv9 32))))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_append_~head.base)) (_ bv1 1))) (= (select |c_#length| c_append_~node~0.base) (_ bv9 32))))) is different from false [2021-11-25 19:03:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:16,645 INFO L93 Difference]: Finished difference Result 572 states and 652 transitions. [2021-11-25 19:03:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 19:03:16,646 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 30 states have internal predecessors, (90), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-11-25 19:03:16,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:16,651 INFO L225 Difference]: With dead ends: 572 [2021-11-25 19:03:16,651 INFO L226 Difference]: Without dead ends: 572 [2021-11-25 19:03:16,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 101 SyntacticMatches, 31 SemanticMatches, 57 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 124.9s TimeCoverageRelationStatistics Valid=336, Invalid=2260, Unknown=84, NotChecked=742, Total=3422 [2021-11-25 19:03:16,654 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 290 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1267 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:16,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 1834 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1291 Invalid, 0 Unknown, 1267 Unchecked, 4.4s Time] [2021-11-25 19:03:16,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-25 19:03:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 432. [2021-11-25 19:03:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 294 states have (on average 1.846938775510204) internal successors, (543), 412 states have internal predecessors, (543), 18 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (36), 16 states have call predecessors, (36), 18 states have call successors, (36) [2021-11-25 19:03:16,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 597 transitions. [2021-11-25 19:03:16,675 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 597 transitions. Word has length 36 [2021-11-25 19:03:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:16,675 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 597 transitions. [2021-11-25 19:03:16,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 30 states have internal predecessors, (90), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:03:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 597 transitions. [2021-11-25 19:03:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 19:03:16,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:16,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:03:16,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:16,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:17,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-25 19:03:17,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:03:17,306 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-25 19:03:17,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1821652058, now seen corresponding path program 1 times [2021-11-25 19:03:17,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:03:17,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231751741] [2021-11-25 19:03:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:17,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:03:17,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:03:17,309 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:03:17,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 19:03:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:17,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 19:03:17,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:17,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:17,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:17,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:17,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:18,043 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:18,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 19:03:18,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 19:03:18,101 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:18,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 19:03:18,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 19:03:18,227 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:18,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 19:03:18,259 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:18,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 19:03:18,481 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-25 19:03:18,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 26 [2021-11-25 19:03:18,772 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-25 19:03:18,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-11-25 19:03:18,807 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:03:18,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2021-11-25 19:03:18,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 28 [2021-11-25 19:03:18,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:19,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:19,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 28 [2021-11-25 19:03:19,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:19,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 28 [2021-11-25 19:03:19,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 13 [2021-11-25 19:03:19,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 7 [2021-11-25 19:03:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:19,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:19,650 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_991 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_991) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))) (bvule (bvadd .cse0 (_ bv5 32)) (bvadd .cse0 (_ bv9 32))))) (forall ((v_ArrVal_990 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_991 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd c_append_~head.offset (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_991) c_append_~head.base) .cse1) (_ bv9 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_990) c_append_~head.base) .cse1)))))) is different from false [2021-11-25 19:03:19,970 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_62 (_ BitVec 32))) (or (and (forall ((v_ArrVal_990 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_991 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd (_ bv4 32) |c_append_#in~head.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_62 v_ArrVal_991) |c_append_#in~head.base|) .cse0) (_ bv9 32)) (select (store |c_#length| v_append_~node~0.base_62 (_ bv9 32)) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_62 v_ArrVal_990) |c_append_#in~head.base|) .cse0))))) (forall ((v_ArrVal_991 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_62 v_ArrVal_991) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))) (bvule (bvadd .cse1 (_ bv5 32)) (bvadd .cse1 (_ bv9 32)))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_62))))))) is different from false [2021-11-25 19:03:20,127 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_62 (_ BitVec 32))) (or (and (forall ((v_ArrVal_991 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_62 v_ArrVal_991) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)))) (bvule (bvadd (_ bv5 32) .cse0) (bvadd .cse0 (_ bv9 32))))) (forall ((v_ArrVal_990 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_991 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_62 v_ArrVal_991) |c_ULTIMATE.start_main_~list~0#1.base|) .cse1) (_ bv9 32)) (select (store |c_#length| v_append_~node~0.base_62 (_ bv9 32)) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_62 v_ArrVal_990) |c_ULTIMATE.start_main_~list~0#1.base|) .cse1)))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_62)))))))) is different from false [2021-11-25 19:03:20,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:20,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 109 treesize of output 110 [2021-11-25 19:03:20,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:20,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 153 treesize of output 141 [2021-11-25 19:03:20,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:20,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 141 treesize of output 111 [2021-11-25 19:03:20,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:20,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 170 treesize of output 140 [2021-11-25 19:03:20,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 198 treesize of output 186 [2021-11-25 19:03:20,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 115 treesize of output 91 [2021-11-25 19:03:20,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 91 treesize of output 67 [2021-11-25 19:03:20,833 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:03:20,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 18 [2021-11-25 19:03:21,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:21,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 87 [2021-11-25 19:03:21,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:21,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 87 treesize of output 87 [2021-11-25 19:03:21,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:21,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 189 treesize of output 192 [2021-11-25 19:03:21,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:21,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 659 treesize of output 620 [2021-11-25 19:03:21,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 581 treesize of output 549 [2021-11-25 19:03:21,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 549 treesize of output 517 [2021-11-25 19:03:21,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 517 treesize of output 501 [2021-11-25 19:03:21,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 501 treesize of output 485 [2021-11-25 19:03:21,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 485 treesize of output 469 [2021-11-25 19:03:21,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 469 treesize of output 437 [2021-11-25 19:03:25,947 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:03:25,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 18 [2021-11-25 19:03:28,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-25 19:03:28,571 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:03:28,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231751741] [2021-11-25 19:03:28,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231751741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:03:28,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [766163852] [2021-11-25 19:03:28,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:28,572 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:03:28,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:03:28,573 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:03:28,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-25 19:03:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:29,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-25 19:03:29,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:29,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:29,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:30,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:30,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:30,223 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:30,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 19:03:30,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 19:03:30,297 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:30,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 19:03:30,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 19:03:30,523 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:30,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 19:03:30,560 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:30,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 19:03:30,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:30,914 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-25 19:03:30,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 35 [2021-11-25 19:03:31,579 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-25 19:03:31,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 38 [2021-11-25 19:03:31,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 18 [2021-11-25 19:03:31,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 19:03:31,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 30 [2021-11-25 19:03:32,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 30 [2021-11-25 19:03:32,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:32,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 30 [2021-11-25 19:03:32,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:32,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 19:03:32,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:03:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:32,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:32,405 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1092 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1091 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd c_append_~head.offset (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1091) c_append_~head.base) .cse0) (_ bv9 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1092) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_1091 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1091) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))) (bvule (bvadd .cse1 (_ bv5 32)) (bvadd .cse1 (_ bv9 32)))))) is different from false [2021-11-25 19:03:34,088 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_67 (_ BitVec 32))) (or (and (forall ((v_ArrVal_1091 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_67 v_ArrVal_1091) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)))) (bvule (bvadd .cse0 (_ bv5 32)) (bvadd .cse0 (_ bv9 32))))) (forall ((v_ArrVal_1084 (_ BitVec 32)) (v_ArrVal_1092 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1091 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_67 v_ArrVal_1091) |c_ULTIMATE.start_main_~list~0#1.base|) .cse1) (_ bv9 32)) (select (store |c_#length| v_append_~node~0.base_67 v_ArrVal_1084) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_67 v_ArrVal_1092) |c_ULTIMATE.start_main_~list~0#1.base|) .cse1)))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_67))))))))))) is different from false [2021-11-25 19:03:34,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:34,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 109 treesize of output 110 [2021-11-25 19:03:34,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:34,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 153 treesize of output 141 [2021-11-25 19:03:34,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:34,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 141 treesize of output 111 [2021-11-25 19:03:34,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:03:34,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 170 treesize of output 140 [2021-11-25 19:03:34,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:03:34,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 580 treesize of output 564 [2021-11-25 19:03:34,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 564 treesize of output 508 [2021-11-25 19:03:34,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 508 treesize of output 392 [2021-11-25 19:03:45,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [766163852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:45,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284615385] [2021-11-25 19:03:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:45,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:45,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:45,339 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:45,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_615d01f5-bfda-4473-8ff6-1a415dff7d54/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 19:03:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:45,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-25 19:03:45,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:45,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:45,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:46,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:46,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:46,644 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:46,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 19:03:46,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 19:03:46,717 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:46,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 22 [2021-11-25 19:03:46,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-11-25 19:03:46,951 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:46,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 19:03:46,987 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:03:46,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 26 [2021-11-25 19:03:47,355 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-11-25 19:03:47,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 76 treesize of output 74 [2021-11-25 19:03:48,090 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 19:03:48,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-11-25 19:03:48,134 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-11-25 19:03:48,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:48,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 19:03:48,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 30 [2021-11-25 19:03:48,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 30 [2021-11-25 19:03:48,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:48,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:03:48,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 30 [2021-11-25 19:03:48,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 19:03:48,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:03:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:03:48,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:48,617 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1190 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1190) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))) (bvule (bvadd .cse0 (_ bv5 32)) (bvadd .cse0 (_ bv9 32))))) (forall ((v_ArrVal_1189 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1190 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd c_append_~head.offset (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1190) c_append_~head.base) .cse1) (_ bv9 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1189) c_append_~head.base) .cse1)))))) is different from false [2021-11-25 19:03:48,905 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_71 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_71)))) (and (forall ((v_ArrVal_1190 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_71 v_ArrVal_1190) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))) (bvule (bvadd .cse0 (_ bv5 32)) (bvadd .cse0 (_ bv9 32))))) (forall ((v_ArrVal_1189 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1184 (_ BitVec 32)) (v_ArrVal_1190 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv4 32) |c_append_#in~head.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_71 v_ArrVal_1190) |c_append_#in~head.base|) .cse1) (_ bv9 32)) (select (store |c_#length| v_append_~node~0.base_71 v_ArrVal_1184) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_71 v_ArrVal_1189) |c_append_#in~head.base|) .cse1)))))))) is different from false