./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V --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 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:49:56,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:49:56,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:49:56,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:49:56,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:49:56,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:49:56,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:49:56,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:49:56,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:49:56,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:49:56,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:49:56,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:49:56,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:49:56,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:49:56,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:49:56,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:49:56,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:49:56,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:49:56,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:49:56,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:49:56,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:49:56,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:49:56,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:49:56,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:49:56,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:49:56,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:49:56,522 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:49:56,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:49:56,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:49:56,526 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:49:56,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:49:56,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:49:56,529 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:49:56,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:49:56,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:49:56,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:49:56,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:49:56,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:49:56,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:49:56,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:49:56,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:49:56,536 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:49:56,583 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:49:56,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:49:56,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:49:56,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:49:56,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:49:56,586 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:49:56,586 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:49:56,586 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:49:56,586 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:49:56,587 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:49:56,588 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:49:56,588 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:49:56,588 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:49:56,588 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:49:56,589 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:49:56,589 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:49:56,589 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:49:56,589 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:49:56,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:49:56,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:49:56,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:49:56,591 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:49:56,591 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:49:56,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:49:56,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:49:56,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:49:56,593 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:49:56,593 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:49:56,594 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:49:56,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:49:56,594 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:49:56,595 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:49:56,595 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:49:56,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:49:56,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:49:56,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:49:56,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:49:56,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:49:56,596 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:49:56,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:49:56,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:49:56,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:49:56,597 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_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 [2021-11-23 03:49:56,899 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:49:56,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:49:56,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:49:56,937 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:49:56,937 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:49:56,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2021-11-23 03:49:57,017 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/data/99bd0705e/4ff13afaaa8049fc884afaa9680e4fb5/FLAG8a520859b [2021-11-23 03:49:57,614 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:49:57,615 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2021-11-23 03:49:57,630 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/data/99bd0705e/4ff13afaaa8049fc884afaa9680e4fb5/FLAG8a520859b [2021-11-23 03:49:57,898 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/data/99bd0705e/4ff13afaaa8049fc884afaa9680e4fb5 [2021-11-23 03:49:57,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:49:57,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:49:57,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:49:57,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:49:57,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:49:57,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:49:57" (1/1) ... [2021-11-23 03:49:57,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33e07a1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:57, skipping insertion in model container [2021-11-23 03:49:57,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:49:57" (1/1) ... [2021-11-23 03:49:57,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:49:57,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:49:58,469 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:49:58,479 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:49:58,564 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:49:58,596 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:49:58,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:58 WrapperNode [2021-11-23 03:49:58,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:49:58,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:49:58,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:49:58,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:49:58,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:58" (1/1) ... [2021-11-23 03:49:58,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:58" (1/1) ... [2021-11-23 03:49:58,689 INFO L137 Inliner]: procedures = 125, calls = 94, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 304 [2021-11-23 03:49:58,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:49:58,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:49:58,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:49:58,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:49:58,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:58" (1/1) ... [2021-11-23 03:49:58,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:58" (1/1) ... [2021-11-23 03:49:58,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:58" (1/1) ... [2021-11-23 03:49:58,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:58" (1/1) ... [2021-11-23 03:49:58,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:58" (1/1) ... [2021-11-23 03:49:58,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:58" (1/1) ... [2021-11-23 03:49:58,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:58" (1/1) ... [2021-11-23 03:49:58,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:49:58,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:49:58,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:49:58,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:49:58,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:58" (1/1) ... [2021-11-23 03:49:58,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:49:58,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:49:58,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:49:58,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:49:58,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:49:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:49:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:49:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:49:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:49:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:49:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:49:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:49:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:49:58,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:49:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-11-23 03:49:58,870 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-11-23 03:49:59,005 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:49:59,007 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:49:59,827 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:49:59,905 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:49:59,906 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-23 03:49:59,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:49:59 BoogieIcfgContainer [2021-11-23 03:49:59,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:49:59,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:49:59,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:49:59,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:49:59,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:49:57" (1/3) ... [2021-11-23 03:49:59,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ea1e19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:49:59, skipping insertion in model container [2021-11-23 03:49:59,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:49:58" (2/3) ... [2021-11-23 03:49:59,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ea1e19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:49:59, skipping insertion in model container [2021-11-23 03:49:59,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:49:59" (3/3) ... [2021-11-23 03:49:59,918 INFO L111 eAbstractionObserver]: Analyzing ICFG split_list_test05-1.i [2021-11-23 03:49:59,923 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:49:59,923 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2021-11-23 03:49:59,970 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:49:59,977 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 [2021-11-23 03:49:59,977 INFO L340 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2021-11-23 03:49:59,999 INFO L276 IsEmpty]: Start isEmpty. Operand has 293 states, 130 states have (on average 2.353846153846154) internal successors, (306), 279 states have internal predecessors, (306), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-23 03:50:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-23 03:50:00,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:00,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-23 03:50:00,006 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-23 03:50:00,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:00,012 INFO L85 PathProgramCache]: Analyzing trace with hash 17643, now seen corresponding path program 1 times [2021-11-23 03:50:00,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:00,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849651653] [2021-11-23 03:50:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:00,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:00,163 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:00,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849651653] [2021-11-23 03:50:00,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849651653] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:00,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:00,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:50:00,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796513922] [2021-11-23 03:50:00,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:00,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:50:00,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:50:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:00,201 INFO L87 Difference]: Start difference. First operand has 293 states, 130 states have (on average 2.353846153846154) internal successors, (306), 279 states have internal predecessors, (306), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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) [2021-11-23 03:50:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:00,615 INFO L93 Difference]: Finished difference Result 499 states and 552 transitions. [2021-11-23 03:50:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:50:00,618 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 [2021-11-23 03:50:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:00,640 INFO L225 Difference]: With dead ends: 499 [2021-11-23 03:50:00,640 INFO L226 Difference]: Without dead ends: 498 [2021-11-23 03:50:00,644 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 [2021-11-23 03:50:00,648 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, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:00,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 370 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:50:00,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-23 03:50:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 364. [2021-11-23 03:50:00,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 204 states have (on average 2.3186274509803924) internal successors, (473), 350 states have internal predecessors, (473), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-23 03:50:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 501 transitions. [2021-11-23 03:50:00,740 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 501 transitions. Word has length 2 [2021-11-23 03:50:00,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:00,741 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 501 transitions. [2021-11-23 03:50:00,741 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) [2021-11-23 03:50:00,741 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 501 transitions. [2021-11-23 03:50:00,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-23 03:50:00,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:00,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-23 03:50:00,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:50:00,742 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-23 03:50:00,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:00,746 INFO L85 PathProgramCache]: Analyzing trace with hash 17644, now seen corresponding path program 1 times [2021-11-23 03:50:00,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:00,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169213723] [2021-11-23 03:50:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:00,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:00,817 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:00,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169213723] [2021-11-23 03:50:00,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169213723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:00,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:00,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:50:00,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146568894] [2021-11-23 03:50:00,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:00,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:50:00,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:00,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:50:00,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:00,822 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) [2021-11-23 03:50:01,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:01,033 INFO L93 Difference]: Finished difference Result 365 states and 504 transitions. [2021-11-23 03:50:01,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:50:01,034 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 [2021-11-23 03:50:01,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:01,037 INFO L225 Difference]: With dead ends: 365 [2021-11-23 03:50:01,037 INFO L226 Difference]: Without dead ends: 365 [2021-11-23 03:50:01,038 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 [2021-11-23 03:50:01,046 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 5 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-11-23 03:50:01,047 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] [2021-11-23 03:50:01,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-23 03:50:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2021-11-23 03:50:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 204 states have (on average 2.3088235294117645) internal successors, (471), 348 states have internal predecessors, (471), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-23 03:50:01,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 499 transitions. [2021-11-23 03:50:01,079 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 499 transitions. Word has length 2 [2021-11-23 03:50:01,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:01,079 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 499 transitions. [2021-11-23 03:50:01,085 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) [2021-11-23 03:50:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 499 transitions. [2021-11-23 03:50:01,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:50:01,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:01,086 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:01,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:50:01,087 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-23 03:50:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash 693761083, now seen corresponding path program 1 times [2021-11-23 03:50:01,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:01,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501111747] [2021-11-23 03:50:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:01,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:01,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:01,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501111747] [2021-11-23 03:50:01,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501111747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:01,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:01,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:50:01,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075464141] [2021-11-23 03:50:01,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:01,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:50:01,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:01,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:50:01,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:01,187 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) [2021-11-23 03:50:01,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:01,407 INFO L93 Difference]: Finished difference Result 357 states and 494 transitions. [2021-11-23 03:50:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:50:01,408 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 [2021-11-23 03:50:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:01,411 INFO L225 Difference]: With dead ends: 357 [2021-11-23 03:50:01,411 INFO L226 Difference]: Without dead ends: 357 [2021-11-23 03:50:01,411 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 [2021-11-23 03:50:01,413 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 39 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:01,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 405 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:50:01,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-23 03:50:01,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2021-11-23 03:50:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 204 states have (on average 2.284313725490196) internal successors, (466), 343 states have internal predecessors, (466), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-23 03:50:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 494 transitions. [2021-11-23 03:50:01,426 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 494 transitions. Word has length 8 [2021-11-23 03:50:01,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:01,426 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 494 transitions. [2021-11-23 03:50:01,426 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) [2021-11-23 03:50:01,427 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 494 transitions. [2021-11-23 03:50:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:50:01,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:01,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:01,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:50:01,428 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-23 03:50:01,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:01,428 INFO L85 PathProgramCache]: Analyzing trace with hash 693761084, now seen corresponding path program 1 times [2021-11-23 03:50:01,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:01,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795445051] [2021-11-23 03:50:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:01,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:01,495 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:01,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795445051] [2021-11-23 03:50:01,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795445051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:01,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:01,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:50:01,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019516089] [2021-11-23 03:50:01,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:01,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:50:01,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:50:01,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:01,497 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) [2021-11-23 03:50:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:01,693 INFO L93 Difference]: Finished difference Result 352 states and 489 transitions. [2021-11-23 03:50:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:50:01,694 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 [2021-11-23 03:50:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:01,696 INFO L225 Difference]: With dead ends: 352 [2021-11-23 03:50:01,696 INFO L226 Difference]: Without dead ends: 352 [2021-11-23 03:50:01,697 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 [2021-11-23 03:50:01,707 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 34 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:01,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 416 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:50:01,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-23 03:50:01,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2021-11-23 03:50:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 204 states have (on average 2.2598039215686274) internal successors, (461), 338 states have internal predecessors, (461), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-23 03:50:01,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 489 transitions. [2021-11-23 03:50:01,722 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 489 transitions. Word has length 8 [2021-11-23 03:50:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:01,722 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 489 transitions. [2021-11-23 03:50:01,723 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) [2021-11-23 03:50:01,723 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 489 transitions. [2021-11-23 03:50:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:50:01,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:01,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:01,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:50:01,724 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-23 03:50:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash 31757518, now seen corresponding path program 1 times [2021-11-23 03:50:01,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:01,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417066326] [2021-11-23 03:50:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:01,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:01,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:01,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417066326] [2021-11-23 03:50:01,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417066326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:01,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:01,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:50:01,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252803656] [2021-11-23 03:50:01,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:01,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:50:01,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:01,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:50:01,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:50:01,845 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) [2021-11-23 03:50:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:02,420 INFO L93 Difference]: Finished difference Result 475 states and 526 transitions. [2021-11-23 03:50:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:50:02,421 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 [2021-11-23 03:50:02,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:02,424 INFO L225 Difference]: With dead ends: 475 [2021-11-23 03:50:02,424 INFO L226 Difference]: Without dead ends: 475 [2021-11-23 03:50:02,424 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 [2021-11-23 03:50:02,425 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 289 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:02,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 642 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:50:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-11-23 03:50:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 344. [2021-11-23 03:50:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 204 states have (on average 2.2205882352941178) internal successors, (453), 330 states have internal predecessors, (453), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-23 03:50:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2021-11-23 03:50:02,445 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 9 [2021-11-23 03:50:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:02,445 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2021-11-23 03:50:02,445 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) [2021-11-23 03:50:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2021-11-23 03:50:02,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:50:02,446 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:02,446 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:02,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:50:02,446 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-23 03:50:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash 31757519, now seen corresponding path program 1 times [2021-11-23 03:50:02,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:02,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998395316] [2021-11-23 03:50:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:02,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:02,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:02,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998395316] [2021-11-23 03:50:02,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998395316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:02,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:02,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:50:02,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246737363] [2021-11-23 03:50:02,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:02,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:50:02,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:02,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:50:02,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:50:02,593 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) [2021-11-23 03:50:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:03,389 INFO L93 Difference]: Finished difference Result 465 states and 516 transitions. [2021-11-23 03:50:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:50:03,390 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 [2021-11-23 03:50:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:03,393 INFO L225 Difference]: With dead ends: 465 [2021-11-23 03:50:03,393 INFO L226 Difference]: Without dead ends: 465 [2021-11-23 03:50:03,393 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 [2021-11-23 03:50:03,394 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 732 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:03,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 315 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:50:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-23 03:50:03,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 335. [2021-11-23 03:50:03,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 204 states have (on average 2.1715686274509802) internal successors, (443), 321 states have internal predecessors, (443), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-23 03:50:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 471 transitions. [2021-11-23 03:50:03,411 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 471 transitions. Word has length 9 [2021-11-23 03:50:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:03,411 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 471 transitions. [2021-11-23 03:50:03,411 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) [2021-11-23 03:50:03,412 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 471 transitions. [2021-11-23 03:50:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:50:03,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:03,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:03,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:50:03,413 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-23 03:50:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:03,413 INFO L85 PathProgramCache]: Analyzing trace with hash 881413528, now seen corresponding path program 1 times [2021-11-23 03:50:03,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:03,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874857488] [2021-11-23 03:50:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:03,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:03,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:03,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874857488] [2021-11-23 03:50:03,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874857488] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:03,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:03,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:50:03,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602947701] [2021-11-23 03:50:03,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:03,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:50:03,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:03,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:50:03,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:50:03,548 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) [2021-11-23 03:50:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:03,939 INFO L93 Difference]: Finished difference Result 352 states and 491 transitions. [2021-11-23 03:50:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:50:03,939 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 [2021-11-23 03:50:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:03,942 INFO L225 Difference]: With dead ends: 352 [2021-11-23 03:50:03,942 INFO L226 Difference]: Without dead ends: 352 [2021-11-23 03:50:03,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:50:03,943 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 18 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:03,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 1033 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:50:03,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-23 03:50:03,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 342. [2021-11-23 03:50:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 210 states have (on average 2.142857142857143) internal successors, (450), 327 states have internal predecessors, (450), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 03:50:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 480 transitions. [2021-11-23 03:50:03,955 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 480 transitions. Word has length 16 [2021-11-23 03:50:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:03,956 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 480 transitions. [2021-11-23 03:50:03,956 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) [2021-11-23 03:50:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 480 transitions. [2021-11-23 03:50:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:50:03,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:03,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:03,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:50:03,958 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-23 03:50:03,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:03,958 INFO L85 PathProgramCache]: Analyzing trace with hash 114903210, now seen corresponding path program 1 times [2021-11-23 03:50:03,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:03,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42935529] [2021-11-23 03:50:03,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:03,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:04,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:04,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42935529] [2021-11-23 03:50:04,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42935529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:04,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:04,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 03:50:04,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914095622] [2021-11-23 03:50:04,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:04,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:50:04,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:50:04,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:50:04,139 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) [2021-11-23 03:50:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:04,889 INFO L93 Difference]: Finished difference Result 476 states and 529 transitions. [2021-11-23 03:50:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:50:04,890 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 [2021-11-23 03:50:04,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:04,893 INFO L225 Difference]: With dead ends: 476 [2021-11-23 03:50:04,893 INFO L226 Difference]: Without dead ends: 476 [2021-11-23 03:50:04,894 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 [2021-11-23 03:50:04,894 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 685 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:04,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 1067 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:50:04,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-23 03:50:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 344. [2021-11-23 03:50:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 212 states have (on average 2.1320754716981134) internal successors, (452), 329 states have internal predecessors, (452), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 03:50:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 482 transitions. [2021-11-23 03:50:04,906 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 482 transitions. Word has length 17 [2021-11-23 03:50:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:04,907 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 482 transitions. [2021-11-23 03:50:04,907 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) [2021-11-23 03:50:04,907 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 482 transitions. [2021-11-23 03:50:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 03:50:04,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:04,909 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] [2021-11-23 03:50:04,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:50:04,909 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-23 03:50:04,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:04,910 INFO L85 PathProgramCache]: Analyzing trace with hash -861403346, now seen corresponding path program 1 times [2021-11-23 03:50:04,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:04,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123100025] [2021-11-23 03:50:04,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:04,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:05,425 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:05,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123100025] [2021-11-23 03:50:05,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123100025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:05,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690553244] [2021-11-23 03:50:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:05,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:05,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:05,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:05,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:50:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:05,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 03:50:05,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:05,581 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 [2021-11-23 03:50:05,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:50:05,986 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 03:50:05,986 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 32 [2021-11-23 03:50:06,087 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-23 03:50:06,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 65 [2021-11-23 03:50:06,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:06,453 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-23 03:50:06,454 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 [2021-11-23 03:50:06,704 INFO L354 Elim1Store]: treesize reduction 68, result has 31.3 percent of original size [2021-11-23 03:50:06,704 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 74 treesize of output 91 [2021-11-23 03:50:06,846 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-23 03:50:06,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 56 [2021-11-23 03:50:07,258 INFO L354 Elim1Store]: treesize reduction 112, result has 14.5 percent of original size [2021-11-23 03:50:07,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 65 [2021-11-23 03:50:07,394 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-11-23 03:50:07,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 74 [2021-11-23 03:50:07,592 INFO L354 Elim1Store]: treesize reduction 150, result has 2.0 percent of original size [2021-11-23 03:50:07,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 103 treesize of output 55 [2021-11-23 03:50:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:07,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:11,908 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 1067012 treesize of output 1063940 [2021-11-23 03:50:15,479 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 03:50:15,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753262618] [2021-11-23 03:50:15,501 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-23 03:50:15,501 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:15,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:15,512 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:15,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:15,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,570 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 [2021-11-23 03:50:15,589 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 11 treesize of output 7 [2021-11-23 03:50:15,596 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 [2021-11-23 03:50:15,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,612 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 [2021-11-23 03:50:15,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,630 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 [2021-11-23 03:50:15,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,639 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 [2021-11-23 03:50:15,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,650 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 [2021-11-23 03:50:15,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,706 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 [2021-11-23 03:50:15,737 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 [2021-11-23 03:50:15,741 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 [2021-11-23 03:50:15,750 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 [2021-11-23 03:50:15,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:50:15,764 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 [2021-11-23 03:50:15,820 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 [2021-11-23 03:50:15,825 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 [2021-11-23 03:50:15,830 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 [2021-11-23 03:50:15,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,841 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 [2021-11-23 03:50:15,845 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 [2021-11-23 03:50:15,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,851 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 [2021-11-23 03:50:15,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,877 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:50:15,877 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 [2021-11-23 03:50:15,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,909 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-23 03:50:15,910 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 [2021-11-23 03:50:15,920 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 [2021-11-23 03:50:15,933 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 [2021-11-23 03:50:15,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,966 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-23 03:50:15,967 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 [2021-11-23 03:50:15,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:15,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:16,021 INFO L354 Elim1Store]: treesize reduction 56, result has 39.8 percent of original size [2021-11-23 03:50:16,022 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2021-11-23 03:50:16,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:16,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:16,409 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 [2021-11-23 03:50:16,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:16,417 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 [2021-11-23 03:50:16,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:16,425 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 [2021-11-23 03:50:16,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:16,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:16,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:16,462 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 [2021-11-23 03:50:16,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:16,503 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 [2021-11-23 03:50:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:16,837 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 [2021-11-23 03:50:16,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:16,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:16,846 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 [2021-11-23 03:50:17,933 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:50:17,934 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 643 treesize of output 635 [2021-11-23 03:50:19,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,270 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 [2021-11-23 03:50:19,292 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 27 for LOIs [2021-11-23 03:50:19,312 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 [2021-11-23 03:50:19,319 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 [2021-11-23 03:50:19,338 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 [2021-11-23 03:50:19,346 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 [2021-11-23 03:50:19,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:50:19,466 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 [2021-11-23 03:50:19,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,476 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 [2021-11-23 03:50:19,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,485 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 [2021-11-23 03:50:19,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:50:19,507 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 [2021-11-23 03:50:19,513 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 [2021-11-23 03:50:19,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:50:19,527 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 [2021-11-23 03:50:19,560 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 [2021-11-23 03:50:19,565 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 [2021-11-23 03:50:19,573 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 [2021-11-23 03:50:19,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,588 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 [2021-11-23 03:50:19,595 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 [2021-11-23 03:50:19,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,603 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 [2021-11-23 03:50:19,618 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-23 03:50:19,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,632 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 [2021-11-23 03:50:19,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,644 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 [2021-11-23 03:50:19,660 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 [2021-11-23 03:50:19,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:50:19,679 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 [2021-11-23 03:50:19,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:19,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:50:19,703 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 [2021-11-23 03:50:19,715 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:50:22,908 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6655#(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 [2021-11-23 03:50:22,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:50:22,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:50:22,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-23 03:50:22,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392391588] [2021-11-23 03:50:22,911 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:22,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:50:22,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:22,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:50:22,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2949, Unknown=2, NotChecked=0, Total=3192 [2021-11-23 03:50:22,917 INFO L87 Difference]: Start difference. First operand 344 states and 482 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 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) [2021-11-23 03:50:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:25,174 INFO L93 Difference]: Finished difference Result 479 states and 531 transitions. [2021-11-23 03:50:25,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:50:25,175 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 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 31 [2021-11-23 03:50:25,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:25,178 INFO L225 Difference]: With dead ends: 479 [2021-11-23 03:50:25,178 INFO L226 Difference]: Without dead ends: 479 [2021-11-23 03:50:25,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=317, Invalid=3586, Unknown=3, NotChecked=0, Total=3906 [2021-11-23 03:50:25,181 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 994 mSDsluCounter, 1256 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:25,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 1328 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 03:50:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-23 03:50:25,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 349. [2021-11-23 03:50:25,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 217 states have (on average 2.1013824884792625) internal successors, (456), 334 states have internal predecessors, (456), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-23 03:50:25,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 486 transitions. [2021-11-23 03:50:25,200 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 486 transitions. Word has length 31 [2021-11-23 03:50:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:25,200 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 486 transitions. [2021-11-23 03:50:25,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 14 states have internal predecessors, (28), 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) [2021-11-23 03:50:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 486 transitions. [2021-11-23 03:50:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 03:50:25,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:25,202 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] [2021-11-23 03:50:25,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:25,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 03:50:25,419 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-11-23 03:50:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash -861403345, now seen corresponding path program 1 times [2021-11-23 03:50:25,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:25,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595650038] [2021-11-23 03:50:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:25,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:26,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:26,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595650038] [2021-11-23 03:50:26,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595650038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:26,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144080173] [2021-11-23 03:50:26,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:26,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:26,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:26,047 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:26,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_253cb224-0658-474e-98ae-d22541ca2421/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:50:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:26,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-23 03:50:26,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:26,146 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 [2021-11-23 03:50:26,391 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 33 treesize of output 29 [2021-11-23 03:50:26,395 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 29 treesize of output 25 [2021-11-23 03:50:26,511 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 03:50:26,512 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 51 treesize of output 60 [2021-11-23 03:50:26,539 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 03:50:26,540 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 57 treesize of output 66 [2021-11-23 03:50:26,765 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-23 03:50:26,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 122 [2021-11-23 03:50:26,806 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-11-23 03:50:26,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 131 [2021-11-23 03:50:29,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:29,847 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-23 03:50:29,847 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 147 treesize of output 146 [2021-11-23 03:50:30,249 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-23 03:50:30,249 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 156 treesize of output 158 [2021-11-23 03:50:30,265 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-23 03:50:30,265 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 155 treesize of output 157 [2021-11-23 03:50:30,399 INFO L354 Elim1Store]: treesize reduction 172, result has 15.3 percent of original size [2021-11-23 03:50:30,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 169 treesize of output 130 [2021-11-23 03:50:30,439 INFO L354 Elim1Store]: treesize reduction 140, result has 16.2 percent of original size [2021-11-23 03:50:30,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 154 treesize of output 124 [2021-11-23 03:50:30,801 INFO L354 Elim1Store]: treesize reduction 140, result has 16.2 percent of original size [2021-11-23 03:50:30,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 165 treesize of output 146 [2021-11-23 03:50:30,825 INFO L354 Elim1Store]: treesize reduction 172, result has 15.3 percent of original size [2021-11-23 03:50:30,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 124 [2021-11-23 03:50:30,925 INFO L354 Elim1Store]: treesize reduction 206, result has 16.3 percent of original size [2021-11-23 03:50:30,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 174 treesize of output 146 [2021-11-23 03:50:30,978 INFO L354 Elim1Store]: treesize reduction 174, result has 17.1 percent of original size [2021-11-23 03:50:30,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 151 [2021-11-23 03:50:31,254 INFO L354 Elim1Store]: treesize reduction 198, result has 1.5 percent of original size [2021-11-23 03:50:31,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 190 treesize of output 118 [2021-11-23 03:50:31,280 INFO L354 Elim1Store]: treesize reduction 134, result has 2.2 percent of original size [2021-11-23 03:50:31,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 65 [2021-11-23 03:50:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:31,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:39,645 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 8392681 treesize of output 8386537 [2021-11-23 03:50:46,294 WARN L227 SmtUtils]: Spent 6.65s on a formula simplification that was a NOOP. DAG size: 859 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-23 03:50:46,384 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 8767248732 treesize of output 8742076764