./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P --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 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:03:14,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:03:14,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:03:14,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:03:14,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:03:14,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:03:14,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:03:14,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:03:14,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:03:14,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:03:14,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:03:14,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:03:14,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:03:14,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:03:14,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:03:14,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:03:14,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:03:14,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:03:14,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:03:14,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:03:14,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:03:14,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:03:14,589 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:03:14,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:03:14,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:03:14,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:03:14,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:03:14,597 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:03:14,598 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:03:14,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:03:14,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:03:14,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:03:14,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:03:14,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:03:14,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:03:14,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:03:14,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:03:14,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:03:14,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:03:14,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:03:14,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:03:14,611 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 00:03:14,640 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:03:14,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:03:14,640 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:03:14,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:03:14,641 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:03:14,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:03:14,642 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:03:14,643 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:03:14,643 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:03:14,645 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:03:14,645 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:03:14,645 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:03:14,646 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:03:14,646 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:03:14,646 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:03:14,647 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:03:14,648 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:03:14,648 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:03:14,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 00:03:14,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 00:03:14,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:03:14,650 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:03:14,650 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:03:14,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:03:14,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:03:14,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:03:14,653 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 00:03:14,653 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 00:03:14,653 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 00:03:14,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:03:14,654 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 00:03:14,654 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:03:14,654 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:03:14,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:03:14,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:03:14,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:03:14,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:03:14,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:03:14,656 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:03:14,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:03:14,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:03:14,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:03:14,657 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_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2021-11-21 00:03:14,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:03:14,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:03:14,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:03:14,934 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:03:14,936 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:03:14,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-11-21 00:03:15,025 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/data/57a7a5e39/72939563665044b697b9986947ce603c/FLAG28c76841d [2021-11-21 00:03:15,579 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:03:15,580 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-11-21 00:03:15,603 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/data/57a7a5e39/72939563665044b697b9986947ce603c/FLAG28c76841d [2021-11-21 00:03:15,902 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/data/57a7a5e39/72939563665044b697b9986947ce603c [2021-11-21 00:03:15,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:03:15,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:03:15,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:03:15,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:03:15,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:03:15,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:03:15" (1/1) ... [2021-11-21 00:03:15,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1af9a24a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:15, skipping insertion in model container [2021-11-21 00:03:15,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:03:15" (1/1) ... [2021-11-21 00:03:15,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:03:15,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:03:16,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:03:16,434 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:03:16,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:03:16,550 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:03:16,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:16 WrapperNode [2021-11-21 00:03:16,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:03:16,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:03:16,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:03:16,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:03:16,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:16" (1/1) ... [2021-11-21 00:03:16,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:16" (1/1) ... [2021-11-21 00:03:16,638 INFO L137 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2021-11-21 00:03:16,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:03:16,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:03:16,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:03:16,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:03:16,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:16" (1/1) ... [2021-11-21 00:03:16,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:16" (1/1) ... [2021-11-21 00:03:16,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:16" (1/1) ... [2021-11-21 00:03:16,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:16" (1/1) ... [2021-11-21 00:03:16,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:16" (1/1) ... [2021-11-21 00:03:16,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:16" (1/1) ... [2021-11-21 00:03:16,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:16" (1/1) ... [2021-11-21 00:03:16,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:03:16,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:03:16,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:03:16,692 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:03:16,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:16" (1/1) ... [2021-11-21 00:03:16,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:03:16,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:03:16,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:03:16,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:03:16,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:03:16,789 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-11-21 00:03:16,789 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-11-21 00:03:16,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:03:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:03:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:03:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:03:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:03:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:03:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:03:16,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:03:16,942 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:03:16,952 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:03:17,228 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:03:17,271 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:03:17,271 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:03:17,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:03:17 BoogieIcfgContainer [2021-11-21 00:03:17,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:03:17,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:03:17,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:03:17,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:03:17,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:03:15" (1/3) ... [2021-11-21 00:03:17,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a785bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:03:17, skipping insertion in model container [2021-11-21 00:03:17,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:03:16" (2/3) ... [2021-11-21 00:03:17,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a785bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:03:17, skipping insertion in model container [2021-11-21 00:03:17,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:03:17" (3/3) ... [2021-11-21 00:03:17,284 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2021-11-21 00:03:17,290 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:03:17,290 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-21 00:03:17,364 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:03:17,374 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 [2021-11-21 00:03:17,374 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-21 00:03:17,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:03:17,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:03:17,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:17,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:03:17,408 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:03:17,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:17,413 INFO L85 PathProgramCache]: Analyzing trace with hash 130425256, now seen corresponding path program 1 times [2021-11-21 00:03:17,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:17,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588338002] [2021-11-21 00:03:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:17,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:03:17,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:17,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588338002] [2021-11-21 00:03:17,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588338002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:03:17,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:03:17,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:03:17,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119274794] [2021-11-21 00:03:17,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:03:17,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:03:17,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:17,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:03:17,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:03:17,673 INFO L87 Difference]: Start difference. First operand has 54 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:03:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:17,817 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2021-11-21 00:03:17,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:03:17,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 00:03:17,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:17,829 INFO L225 Difference]: With dead ends: 106 [2021-11-21 00:03:17,829 INFO L226 Difference]: Without dead ends: 103 [2021-11-21 00:03:17,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:03:17,835 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 122 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:17,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 84 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:03:17,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-21 00:03:17,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2021-11-21 00:03:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 66 states have internal predecessors, (84), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-21 00:03:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2021-11-21 00:03:17,887 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 5 [2021-11-21 00:03:17,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:17,887 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2021-11-21 00:03:17,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:03:17,888 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2021-11-21 00:03:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-21 00:03:17,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:17,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-21 00:03:17,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:03:17,889 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:03:17,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:17,890 INFO L85 PathProgramCache]: Analyzing trace with hash 130425257, now seen corresponding path program 1 times [2021-11-21 00:03:17,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:17,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259327357] [2021-11-21 00:03:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:17,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:03:18,003 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:18,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259327357] [2021-11-21 00:03:18,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259327357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:03:18,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:03:18,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:03:18,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779746454] [2021-11-21 00:03:18,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:03:18,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:03:18,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:18,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:03:18,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:03:18,007 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:03:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:18,158 INFO L93 Difference]: Finished difference Result 198 states and 266 transitions. [2021-11-21 00:03:18,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:03:18,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-21 00:03:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:18,162 INFO L225 Difference]: With dead ends: 198 [2021-11-21 00:03:18,162 INFO L226 Difference]: Without dead ends: 198 [2021-11-21 00:03:18,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:03:18,164 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 134 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:18,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 171 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:03:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-21 00:03:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 147. [2021-11-21 00:03:18,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 113 states have (on average 1.7079646017699115) internal successors, (193), 130 states have internal predecessors, (193), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-21 00:03:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 229 transitions. [2021-11-21 00:03:18,192 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 229 transitions. Word has length 5 [2021-11-21 00:03:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:18,193 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 229 transitions. [2021-11-21 00:03:18,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:03:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 229 transitions. [2021-11-21 00:03:18,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:03:18,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:18,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:03:18,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:03:18,194 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:03:18,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:18,195 INFO L85 PathProgramCache]: Analyzing trace with hash -251784379, now seen corresponding path program 1 times [2021-11-21 00:03:18,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:18,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40312003] [2021-11-21 00:03:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:18,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:03:18,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:18,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40312003] [2021-11-21 00:03:18,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40312003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:03:18,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:03:18,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:03:18,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727508195] [2021-11-21 00:03:18,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:03:18,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:03:18,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:18,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:03:18,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:03:18,374 INFO L87 Difference]: Start difference. First operand 147 states and 229 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-11-21 00:03:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:18,583 INFO L93 Difference]: Finished difference Result 220 states and 317 transitions. [2021-11-21 00:03:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:03:18,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 6 [2021-11-21 00:03:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:18,590 INFO L225 Difference]: With dead ends: 220 [2021-11-21 00:03:18,590 INFO L226 Difference]: Without dead ends: 220 [2021-11-21 00:03:18,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:03:18,599 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 84 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:18,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 141 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:03:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-21 00:03:18,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 150. [2021-11-21 00:03:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 116 states have (on average 1.6896551724137931) internal successors, (196), 133 states have internal predecessors, (196), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-21 00:03:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 232 transitions. [2021-11-21 00:03:18,628 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 232 transitions. Word has length 6 [2021-11-21 00:03:18,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:18,629 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 232 transitions. [2021-11-21 00:03:18,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-11-21 00:03:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 232 transitions. [2021-11-21 00:03:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:03:18,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:18,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:03:18,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:03:18,630 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:03:18,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:18,631 INFO L85 PathProgramCache]: Analyzing trace with hash 784618888, now seen corresponding path program 1 times [2021-11-21 00:03:18,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:18,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076808279] [2021-11-21 00:03:18,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:18,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:03:18,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076808279] [2021-11-21 00:03:18,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076808279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:03:18,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:03:18,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:03:18,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559685833] [2021-11-21 00:03:18,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:03:18,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:03:18,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:18,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:03:18,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:03:18,895 INFO L87 Difference]: Start difference. First operand 150 states and 232 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-21 00:03:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:19,058 INFO L93 Difference]: Finished difference Result 200 states and 267 transitions. [2021-11-21 00:03:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:03:19,059 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 7 [2021-11-21 00:03:19,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:19,061 INFO L225 Difference]: With dead ends: 200 [2021-11-21 00:03:19,062 INFO L226 Difference]: Without dead ends: 200 [2021-11-21 00:03:19,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:03:19,067 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 136 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:19,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 161 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:03:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-21 00:03:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2021-11-21 00:03:19,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 116 states have (on average 1.6724137931034482) internal successors, (194), 133 states have internal predecessors, (194), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-21 00:03:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 230 transitions. [2021-11-21 00:03:19,102 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 230 transitions. Word has length 7 [2021-11-21 00:03:19,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:19,103 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 230 transitions. [2021-11-21 00:03:19,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-11-21 00:03:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 230 transitions. [2021-11-21 00:03:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:03:19,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:19,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:03:19,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:03:19,104 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:03:19,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:19,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1446618201, now seen corresponding path program 1 times [2021-11-21 00:03:19,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:19,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341735691] [2021-11-21 00:03:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:19,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:03:19,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:19,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341735691] [2021-11-21 00:03:19,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341735691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:03:19,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:03:19,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:03:19,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158826801] [2021-11-21 00:03:19,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:03:19,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:03:19,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:19,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:03:19,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:03:19,185 INFO L87 Difference]: Start difference. First operand 150 states and 230 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) 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) [2021-11-21 00:03:19,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:19,290 INFO L93 Difference]: Finished difference Result 227 states and 313 transitions. [2021-11-21 00:03:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:03:19,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) 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 [2021-11-21 00:03:19,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:19,299 INFO L225 Difference]: With dead ends: 227 [2021-11-21 00:03:19,299 INFO L226 Difference]: Without dead ends: 227 [2021-11-21 00:03:19,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:03:19,300 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 111 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:19,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 144 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:03:19,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-21 00:03:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2021-11-21 00:03:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 142 states have (on average 1.6408450704225352) internal successors, (233), 160 states have internal predecessors, (233), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-21 00:03:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 269 transitions. [2021-11-21 00:03:19,332 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 269 transitions. Word has length 8 [2021-11-21 00:03:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:19,333 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 269 transitions. [2021-11-21 00:03:19,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) 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) [2021-11-21 00:03:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 269 transitions. [2021-11-21 00:03:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:03:19,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:19,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:03:19,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:03:19,333 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:03:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:19,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1895491222, now seen corresponding path program 1 times [2021-11-21 00:03:19,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:19,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857328504] [2021-11-21 00:03:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:19,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:03:19,425 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:19,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857328504] [2021-11-21 00:03:19,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857328504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:03:19,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:03:19,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:03:19,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892058558] [2021-11-21 00:03:19,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:03:19,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:03:19,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:19,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:03:19,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:03:19,427 INFO L87 Difference]: Start difference. First operand 178 states and 269 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-11-21 00:03:19,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:19,535 INFO L93 Difference]: Finished difference Result 226 states and 292 transitions. [2021-11-21 00:03:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:03:19,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2021-11-21 00:03:19,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:19,538 INFO L225 Difference]: With dead ends: 226 [2021-11-21 00:03:19,539 INFO L226 Difference]: Without dead ends: 226 [2021-11-21 00:03:19,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:03:19,541 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 180 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:19,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 169 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:03:19,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-21 00:03:19,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 192. [2021-11-21 00:03:19,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 155 states have (on average 1.6387096774193548) internal successors, (254), 174 states have internal predecessors, (254), 10 states have call successors, (10), 7 states have call predecessors, (10), 9 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-21 00:03:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 290 transitions. [2021-11-21 00:03:19,577 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 290 transitions. Word has length 9 [2021-11-21 00:03:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:19,578 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 290 transitions. [2021-11-21 00:03:19,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-11-21 00:03:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 290 transitions. [2021-11-21 00:03:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:03:19,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:19,579 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:03:19,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:03:19,580 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:03:19,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:19,580 INFO L85 PathProgramCache]: Analyzing trace with hash -354750800, now seen corresponding path program 1 times [2021-11-21 00:03:19,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:19,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31361143] [2021-11-21 00:03:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:19,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:03:19,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:19,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31361143] [2021-11-21 00:03:19,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31361143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:03:19,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108122656] [2021-11-21 00:03:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:19,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:19,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:03:19,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:03:19,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:03:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:19,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:03:19,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:03:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:03:20,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:03:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:03:20,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108122656] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:03:20,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1171802037] [2021-11-21 00:03:20,315 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 00:03:20,316 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:03:20,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:03:20,326 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:03:20,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:03:20,995 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 149 for LOIs [2021-11-21 00:03:37,124 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:03:39,711 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:03:39,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:03:39,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2021-11-21 00:03:39,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918012751] [2021-11-21 00:03:39,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:03:39,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:03:39,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:39,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:03:39,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:03:39,714 INFO L87 Difference]: Start difference. First operand 192 states and 290 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:03:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:40,018 INFO L93 Difference]: Finished difference Result 260 states and 349 transitions. [2021-11-21 00:03:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:03:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 00:03:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:40,021 INFO L225 Difference]: With dead ends: 260 [2021-11-21 00:03:40,021 INFO L226 Difference]: Without dead ends: 260 [2021-11-21 00:03:40,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-11-21 00:03:40,022 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 469 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:40,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 345 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:03:40,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-21 00:03:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 197. [2021-11-21 00:03:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 159 states have (on average 1.5660377358490567) internal successors, (249), 179 states have internal predecessors, (249), 10 states have call successors, (10), 7 states have call predecessors, (10), 10 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-21 00:03:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 286 transitions. [2021-11-21 00:03:40,033 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 286 transitions. Word has length 13 [2021-11-21 00:03:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:40,033 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 286 transitions. [2021-11-21 00:03:40,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:03:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 286 transitions. [2021-11-21 00:03:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:03:40,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:40,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:03:40,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:03:40,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:40,259 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:03:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:40,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1887627038, now seen corresponding path program 1 times [2021-11-21 00:03:40,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:40,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50158587] [2021-11-21 00:03:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:40,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:03:40,363 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:40,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50158587] [2021-11-21 00:03:40,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50158587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:03:40,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851405434] [2021-11-21 00:03:40,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:40,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:40,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:03:40,370 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:03:40,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:03:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:40,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 00:03:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:03:40,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-21 00:03:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:03:40,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:03:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:03:40,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851405434] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:03:40,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499581129] [2021-11-21 00:03:40,648 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-21 00:03:40,648 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:03:40,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:03:40,648 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:03:40,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:03:41,186 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 149 for LOIs [2021-11-21 00:03:55,781 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:03:58,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1499581129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:03:58,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:03:58,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 15 [2021-11-21 00:03:58,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004859956] [2021-11-21 00:03:58,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:03:58,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:03:58,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:58,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:03:58,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:03:58,280 INFO L87 Difference]: Start difference. First operand 197 states and 286 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-21 00:03:59,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:59,246 INFO L93 Difference]: Finished difference Result 191 states and 268 transitions. [2021-11-21 00:03:59,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:03:59,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 00:03:59,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:59,257 INFO L225 Difference]: With dead ends: 191 [2021-11-21 00:03:59,257 INFO L226 Difference]: Without dead ends: 191 [2021-11-21 00:03:59,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:03:59,259 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 25 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:59,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 109 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:03:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-21 00:03:59,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-21 00:03:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 153 states have (on average 1.5098039215686274) internal successors, (231), 173 states have internal predecessors, (231), 10 states have call successors, (10), 7 states have call predecessors, (10), 10 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-21 00:03:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 268 transitions. [2021-11-21 00:03:59,268 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 268 transitions. Word has length 14 [2021-11-21 00:03:59,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:59,269 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 268 transitions. [2021-11-21 00:03:59,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-21 00:03:59,269 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 268 transitions. [2021-11-21 00:03:59,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 00:03:59,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:59,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:03:59,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:03:59,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:59,485 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:03:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:59,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1798666464, now seen corresponding path program 1 times [2021-11-21 00:03:59,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:59,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974381097] [2021-11-21 00:03:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:59,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:03:59,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:59,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974381097] [2021-11-21 00:03:59,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974381097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:03:59,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611895221] [2021-11-21 00:03:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:59,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:03:59,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:03:59,624 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:03:59,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:03:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:59,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 00:03:59,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:03:59,968 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:03:59,969 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 22 treesize of output 24 [2021-11-21 00:03:59,978 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:03:59,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:04:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:04:00,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:04:00,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611895221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:04:00,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1013539721] [2021-11-21 00:04:00,211 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-21 00:04:00,211 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:04:00,212 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:04:00,212 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:04:00,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:04:01,110 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-21 00:04:01,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2021-11-21 00:04:01,158 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-21 00:04:01,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-11-21 00:04:02,794 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 199 for LOIs [2021-11-21 00:04:21,403 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:04:28,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1013539721] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:04:28,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:04:28,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5] total 23 [2021-11-21 00:04:28,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004770327] [2021-11-21 00:04:28,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:04:28,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:04:28,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:04:28,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:04:28,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:04:28,032 INFO L87 Difference]: Start difference. First operand 191 states and 268 transitions. Second operand has 14 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:04:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:04:29,309 INFO L93 Difference]: Finished difference Result 247 states and 333 transitions. [2021-11-21 00:04:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 00:04:29,309 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 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 21 [2021-11-21 00:04:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:04:29,311 INFO L225 Difference]: With dead ends: 247 [2021-11-21 00:04:29,311 INFO L226 Difference]: Without dead ends: 247 [2021-11-21 00:04:29,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:04:29,313 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 61 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:04:29,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 119 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 00:04:29,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-21 00:04:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 228. [2021-11-21 00:04:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 187 states have (on average 1.4919786096256684) internal successors, (279), 208 states have internal predecessors, (279), 11 states have call successors, (11), 8 states have call predecessors, (11), 12 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2021-11-21 00:04:29,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 321 transitions. [2021-11-21 00:04:29,323 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 321 transitions. Word has length 21 [2021-11-21 00:04:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:04:29,324 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 321 transitions. [2021-11-21 00:04:29,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:04:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 321 transitions. [2021-11-21 00:04:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-21 00:04:29,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:04:29,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:04:29,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:04:29,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:04:29,551 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:04:29,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:04:29,551 INFO L85 PathProgramCache]: Analyzing trace with hash 60597520, now seen corresponding path program 1 times [2021-11-21 00:04:29,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:04:29,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526121806] [2021-11-21 00:04:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:04:29,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:04:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:04:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:04:29,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:04:29,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526121806] [2021-11-21 00:04:29,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526121806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:04:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013963723] [2021-11-21 00:04:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:04:29,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:04:29,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:04:29,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:04:29,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:04:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:04:29,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 00:04:29,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:04:29,787 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:04:29,788 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 17 treesize of output 21 [2021-11-21 00:04:29,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:04:29,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:04:29,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013963723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:04:29,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535706611] [2021-11-21 00:04:29,983 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-21 00:04:29,983 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:04:29,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:04:29,984 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:04:29,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:04:30,841 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-21 00:04:30,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2021-11-21 00:04:30,885 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-21 00:04:30,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-11-21 00:04:32,579 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 199 for LOIs [2021-11-21 00:04:51,337 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:04:58,082 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:04:58,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:04:58,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-11-21 00:04:58,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133418628] [2021-11-21 00:04:58,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:04:58,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:04:58,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:04:58,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:04:58,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-11-21 00:04:58,083 INFO L87 Difference]: Start difference. First operand 228 states and 321 transitions. Second operand has 11 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:04:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:04:58,204 INFO L93 Difference]: Finished difference Result 321 states and 424 transitions. [2021-11-21 00:04:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:04:58,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-21 00:04:58,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:04:58,209 INFO L225 Difference]: With dead ends: 321 [2021-11-21 00:04:58,209 INFO L226 Difference]: Without dead ends: 321 [2021-11-21 00:04:58,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-11-21 00:04:58,210 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 135 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:04:58,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 351 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 95 Unchecked, 0.1s Time] [2021-11-21 00:04:58,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-21 00:04:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 282. [2021-11-21 00:04:58,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 236 states have (on average 1.4872881355932204) internal successors, (351), 260 states have internal predecessors, (351), 11 states have call successors, (11), 10 states have call predecessors, (11), 17 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-21 00:04:58,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 396 transitions. [2021-11-21 00:04:58,224 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 396 transitions. Word has length 24 [2021-11-21 00:04:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:04:58,224 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 396 transitions. [2021-11-21 00:04:58,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:04:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 396 transitions. [2021-11-21 00:04:58,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 00:04:58,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:04:58,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:04:58,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:04:58,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:04:58,443 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:04:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:04:58,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1878523169, now seen corresponding path program 1 times [2021-11-21 00:04:58,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:04:58,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618695293] [2021-11-21 00:04:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:04:58,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:04:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:04:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:04:58,550 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:04:58,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618695293] [2021-11-21 00:04:58,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618695293] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:04:58,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219927602] [2021-11-21 00:04:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:04:58,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:04:58,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:04:58,551 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:04:58,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:04:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:04:58,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 00:04:58,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:04:58,764 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:04:58,764 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 22 treesize of output 24 [2021-11-21 00:04:58,768 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:04:58,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:04:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:04:58,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:04:59,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219927602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:04:59,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [714229658] [2021-11-21 00:04:59,048 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-21 00:04:59,048 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:04:59,049 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:04:59,049 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:04:59,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:04:59,866 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-21 00:04:59,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2021-11-21 00:04:59,929 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-21 00:04:59,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-11-21 00:05:01,352 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 199 for LOIs [2021-11-21 00:05:20,467 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:05:27,475 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:05:27,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:05:27,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-11-21 00:05:27,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915087644] [2021-11-21 00:05:27,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:05:27,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:05:27,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:27,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:05:27,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-11-21 00:05:27,477 INFO L87 Difference]: Start difference. First operand 282 states and 396 transitions. Second operand has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:05:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:28,047 INFO L93 Difference]: Finished difference Result 416 states and 511 transitions. [2021-11-21 00:05:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:05:28,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-21 00:05:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:28,051 INFO L225 Difference]: With dead ends: 416 [2021-11-21 00:05:28,051 INFO L226 Difference]: Without dead ends: 416 [2021-11-21 00:05:28,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 00:05:28,053 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 492 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:28,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [492 Valid, 518 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 257 Invalid, 0 Unknown, 259 Unchecked, 0.2s Time] [2021-11-21 00:05:28,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-21 00:05:28,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 336. [2021-11-21 00:05:28,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 288 states have (on average 1.5) internal successors, (432), 313 states have internal predecessors, (432), 11 states have call successors, (11), 11 states have call predecessors, (11), 19 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-21 00:05:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 475 transitions. [2021-11-21 00:05:28,084 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 475 transitions. Word has length 25 [2021-11-21 00:05:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:28,086 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 475 transitions. [2021-11-21 00:05:28,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:05:28,087 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 475 transitions. [2021-11-21 00:05:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 00:05:28,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:28,091 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:05:28,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:05:28,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 00:05:28,314 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:05:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:28,315 INFO L85 PathProgramCache]: Analyzing trace with hash -508209177, now seen corresponding path program 1 times [2021-11-21 00:05:28,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:28,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521735133] [2021-11-21 00:05:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:28,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:05:28,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:28,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521735133] [2021-11-21 00:05:28,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521735133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:28,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914601701] [2021-11-21 00:05:28,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:28,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:28,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:28,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:05:28,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:05:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:28,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:05:28,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:05:28,858 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 00:05:28,858 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 24 treesize of output 30 [2021-11-21 00:05:29,101 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:05:29,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2021-11-21 00:05:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:29,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:05:29,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-21 00:05:29,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914601701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:29,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815861785] [2021-11-21 00:05:29,442 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:05:29,443 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:05:29,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:05:29,443 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:05:29,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:05:31,566 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-21 00:05:31,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 217 [2021-11-21 00:05:31,637 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-21 00:05:31,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 218 treesize of output 263 [2021-11-21 00:05:33,965 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 199 for LOIs [2021-11-21 00:05:45,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:45,303 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-21 00:05:45,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-21 00:05:45,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:05:45,346 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-21 00:05:45,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-21 00:05:46,265 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:05:49,131 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:05:49,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:05:49,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-11-21 00:05:49,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383006452] [2021-11-21 00:05:49,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:05:49,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:05:49,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:49,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:05:49,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 00:05:49,134 INFO L87 Difference]: Start difference. First operand 336 states and 475 transitions. Second operand has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:05:49,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:49,903 INFO L93 Difference]: Finished difference Result 475 states and 618 transitions. [2021-11-21 00:05:49,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-21 00:05:49,903 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-21 00:05:49,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:49,907 INFO L225 Difference]: With dead ends: 475 [2021-11-21 00:05:49,907 INFO L226 Difference]: Without dead ends: 475 [2021-11-21 00:05:49,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 00:05:49,909 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 577 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:49,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 545 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 430 Invalid, 0 Unknown, 155 Unchecked, 0.3s Time] [2021-11-21 00:05:49,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-11-21 00:05:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 377. [2021-11-21 00:05:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 326 states have (on average 1.5122699386503067) internal successors, (493), 354 states have internal predecessors, (493), 11 states have call successors, (11), 11 states have call predecessors, (11), 22 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-21 00:05:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 536 transitions. [2021-11-21 00:05:49,925 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 536 transitions. Word has length 29 [2021-11-21 00:05:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:49,926 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 536 transitions. [2021-11-21 00:05:49,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:05:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 536 transitions. [2021-11-21 00:05:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 00:05:49,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:49,927 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:05:49,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:05:50,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:50,140 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:05:50,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:50,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1950933273, now seen corresponding path program 2 times [2021-11-21 00:05:50,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:50,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351641672] [2021-11-21 00:05:50,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:50,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:50,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:50,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351641672] [2021-11-21 00:05:50,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351641672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:50,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407187835] [2021-11-21 00:05:50,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:05:50,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:50,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:50,298 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:05:50,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:05:50,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:05:50,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:05:50,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 00:05:50,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:05:50,560 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:05:50,561 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 22 treesize of output 24 [2021-11-21 00:05:50,566 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:05:50,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:05:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:05:50,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:05:50,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407187835] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:50,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [457341311] [2021-11-21 00:05:50,948 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:05:50,948 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:05:50,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:05:50,949 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:05:50,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:05:53,119 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-21 00:05:53,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 217 [2021-11-21 00:05:53,190 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-21 00:05:53,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 218 treesize of output 263 [2021-11-21 00:05:55,409 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 199 for LOIs [2021-11-21 00:06:06,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:06,806 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-21 00:06:06,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-21 00:06:06,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:06,848 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-21 00:06:06,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-21 00:06:07,812 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:06:10,742 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:06:10,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:06:10,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2021-11-21 00:06:10,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667281772] [2021-11-21 00:06:10,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:06:10,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:06:10,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:10,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:06:10,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-11-21 00:06:10,744 INFO L87 Difference]: Start difference. First operand 377 states and 536 transitions. Second operand has 16 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:06:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:11,482 INFO L93 Difference]: Finished difference Result 508 states and 669 transitions. [2021-11-21 00:06:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 00:06:11,483 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-21 00:06:11,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:11,486 INFO L225 Difference]: With dead ends: 508 [2021-11-21 00:06:11,487 INFO L226 Difference]: Without dead ends: 508 [2021-11-21 00:06:11,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 44 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=301, Invalid=2051, Unknown=0, NotChecked=0, Total=2352 [2021-11-21 00:06:11,494 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 500 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:11,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 710 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 325 Invalid, 0 Unknown, 216 Unchecked, 0.3s Time] [2021-11-21 00:06:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-21 00:06:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 407. [2021-11-21 00:06:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 356 states have (on average 1.5337078651685394) internal successors, (546), 384 states have internal predecessors, (546), 11 states have call successors, (11), 11 states have call predecessors, (11), 22 states have return successors, (29), 11 states have call predecessors, (29), 11 states have call successors, (29) [2021-11-21 00:06:11,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 586 transitions. [2021-11-21 00:06:11,520 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 586 transitions. Word has length 29 [2021-11-21 00:06:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:11,520 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 586 transitions. [2021-11-21 00:06:11,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:06:11,521 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 586 transitions. [2021-11-21 00:06:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 00:06:11,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:11,529 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:06:11,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 00:06:11,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 00:06:11,732 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:06:11,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:11,733 INFO L85 PathProgramCache]: Analyzing trace with hash -349389369, now seen corresponding path program 1 times [2021-11-21 00:06:11,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:11,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421579761] [2021-11-21 00:06:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:11,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:06:11,871 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421579761] [2021-11-21 00:06:11,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421579761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:06:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030094515] [2021-11-21 00:06:11,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:11,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:06:11,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:06:11,874 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:06:11,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:06:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:06:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:06:12,106 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:06:12,109 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 17 treesize of output 21 [2021-11-21 00:06:12,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-21 00:06:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:06:12,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:06:12,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030094515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:06:12,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [296614593] [2021-11-21 00:06:12,484 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:06:12,485 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:06:12,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:06:12,485 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:06:12,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:06:14,638 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-21 00:06:14,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 217 [2021-11-21 00:06:14,719 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-21 00:06:14,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 218 treesize of output 263 [2021-11-21 00:06:17,031 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 199 for LOIs [2021-11-21 00:06:28,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:28,425 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-21 00:06:28,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-21 00:06:28,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:28,466 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-21 00:06:28,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-21 00:06:29,346 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:06:32,159 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:06:32,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:06:32,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-21 00:06:32,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862366662] [2021-11-21 00:06:32,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:06:32,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:06:32,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:32,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:06:32,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-11-21 00:06:32,161 INFO L87 Difference]: Start difference. First operand 407 states and 586 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:06:32,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:32,662 INFO L93 Difference]: Finished difference Result 635 states and 860 transitions. [2021-11-21 00:06:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-21 00:06:32,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-11-21 00:06:32,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:32,667 INFO L225 Difference]: With dead ends: 635 [2021-11-21 00:06:32,667 INFO L226 Difference]: Without dead ends: 635 [2021-11-21 00:06:32,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 00:06:32,669 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 298 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:32,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 640 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 347 Invalid, 0 Unknown, 272 Unchecked, 0.3s Time] [2021-11-21 00:06:32,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-21 00:06:32,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 509. [2021-11-21 00:06:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 450 states have (on average 1.528888888888889) internal successors, (688), 482 states have internal predecessors, (688), 13 states have call successors, (13), 13 states have call predecessors, (13), 28 states have return successors, (37), 13 states have call predecessors, (37), 13 states have call successors, (37) [2021-11-21 00:06:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 738 transitions. [2021-11-21 00:06:32,692 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 738 transitions. Word has length 30 [2021-11-21 00:06:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:32,692 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 738 transitions. [2021-11-21 00:06:32,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:06:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 738 transitions. [2021-11-21 00:06:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 00:06:32,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:32,694 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:06:32,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-21 00:06:32,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:06:32,907 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:06:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:32,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1237251142, now seen corresponding path program 1 times [2021-11-21 00:06:32,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:32,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697423361] [2021-11-21 00:06:32,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:32,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:06:33,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:33,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697423361] [2021-11-21 00:06:33,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697423361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:06:33,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94376555] [2021-11-21 00:06:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:33,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:06:33,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:06:33,042 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:06:33,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:06:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:33,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 00:06:33,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:06:33,530 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:06:33,531 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 22 treesize of output 24 [2021-11-21 00:06:33,536 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:06:33,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:06:33,670 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 29 treesize of output 21 [2021-11-21 00:06:33,674 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 18 treesize of output 10 [2021-11-21 00:06:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:06:33,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:06:33,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94376555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:06:33,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2024809188] [2021-11-21 00:06:33,882 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:06:33,882 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:06:33,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:06:33,883 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:06:33,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:06:36,073 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-21 00:06:36,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 217 [2021-11-21 00:06:36,169 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-21 00:06:36,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 218 treesize of output 263 [2021-11-21 00:06:38,213 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 199 for LOIs [2021-11-21 00:06:49,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:49,518 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-21 00:06:49,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-21 00:06:49,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:06:49,558 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-21 00:06:49,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-21 00:06:50,253 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:06:53,123 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:06:53,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:06:53,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2021-11-21 00:06:53,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882127188] [2021-11-21 00:06:53,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:06:53,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:06:53,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:06:53,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:06:53,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 00:06:53,125 INFO L87 Difference]: Start difference. First operand 509 states and 738 transitions. Second operand has 14 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:06:53,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:53,941 INFO L93 Difference]: Finished difference Result 680 states and 905 transitions. [2021-11-21 00:06:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 00:06:53,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-11-21 00:06:53,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:53,945 INFO L225 Difference]: With dead ends: 680 [2021-11-21 00:06:53,946 INFO L226 Difference]: Without dead ends: 680 [2021-11-21 00:06:53,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=261, Invalid=2189, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 00:06:53,948 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 531 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:53,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 766 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 485 Invalid, 0 Unknown, 325 Unchecked, 0.4s Time] [2021-11-21 00:06:53,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-21 00:06:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 511. [2021-11-21 00:06:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 459 states have (on average 1.5403050108932461) internal successors, (707), 488 states have internal predecessors, (707), 11 states have call successors, (11), 11 states have call predecessors, (11), 23 states have return successors, (28), 11 states have call predecessors, (28), 11 states have call successors, (28) [2021-11-21 00:06:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 746 transitions. [2021-11-21 00:06:53,968 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 746 transitions. Word has length 31 [2021-11-21 00:06:53,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:53,968 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 746 transitions. [2021-11-21 00:06:53,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:06:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 746 transitions. [2021-11-21 00:06:53,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 00:06:53,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:53,969 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:06:54,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:06:54,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 00:06:54,182 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:06:54,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:54,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2053831494, now seen corresponding path program 2 times [2021-11-21 00:06:54,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:54,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195625299] [2021-11-21 00:06:54,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:54,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:06:54,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:54,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195625299] [2021-11-21 00:06:54,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195625299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:06:54,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139975008] [2021-11-21 00:06:54,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:06:54,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:06:54,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:06:54,427 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:06:54,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:06:54,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:06:54,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:06:54,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 00:06:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:06:54,888 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:06:54,888 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 22 treesize of output 24 [2021-11-21 00:06:54,894 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:06:54,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:06:55,285 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-21 00:06:55,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 44 [2021-11-21 00:06:55,294 INFO L354 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2021-11-21 00:06:55,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 27 [2021-11-21 00:06:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:06:55,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:06:56,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139975008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:06:56,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1155311330] [2021-11-21 00:06:56,015 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:06:56,015 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:06:56,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:06:56,016 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:06:56,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:06:58,229 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-11-21 00:06:58,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 183 treesize of output 184 [2021-11-21 00:06:58,293 INFO L354 Elim1Store]: treesize reduction 196, result has 22.5 percent of original size [2021-11-21 00:06:58,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 182 treesize of output 205 [2021-11-21 00:07:00,151 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 199 for LOIs [2021-11-21 00:07:11,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:12,001 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-21 00:07:12,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-21 00:07:12,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:12,051 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-21 00:07:12,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-21 00:07:12,783 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:07:15,886 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:07:15,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:07:15,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-11-21 00:07:15,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823596316] [2021-11-21 00:07:15,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:07:15,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 00:07:15,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:15,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 00:07:15,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1396, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 00:07:15,888 INFO L87 Difference]: Start difference. First operand 511 states and 746 transitions. Second operand has 18 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:07:17,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:17,027 INFO L93 Difference]: Finished difference Result 755 states and 1005 transitions. [2021-11-21 00:07:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-21 00:07:17,028 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-11-21 00:07:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:17,033 INFO L225 Difference]: With dead ends: 755 [2021-11-21 00:07:17,033 INFO L226 Difference]: Without dead ends: 755 [2021-11-21 00:07:17,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=428, Invalid=3112, Unknown=0, NotChecked=0, Total=3540 [2021-11-21 00:07:17,035 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 597 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:17,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 835 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 559 Invalid, 0 Unknown, 307 Unchecked, 0.4s Time] [2021-11-21 00:07:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-11-21 00:07:17,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 591. [2021-11-21 00:07:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 535 states have (on average 1.547663551401869) internal successors, (828), 566 states have internal predecessors, (828), 12 states have call successors, (12), 12 states have call predecessors, (12), 26 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2021-11-21 00:07:17,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 872 transitions. [2021-11-21 00:07:17,062 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 872 transitions. Word has length 31 [2021-11-21 00:07:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:17,062 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 872 transitions. [2021-11-21 00:07:17,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:07:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 872 transitions. [2021-11-21 00:07:17,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 00:07:17,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:17,063 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:17,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:07:17,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 00:07:17,283 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:07:17,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:17,284 INFO L85 PathProgramCache]: Analyzing trace with hash -755733079, now seen corresponding path program 1 times [2021-11-21 00:07:17,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:17,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316252184] [2021-11-21 00:07:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:17,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:17,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:07:17,315 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:17,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316252184] [2021-11-21 00:07:17,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316252184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:07:17,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:07:17,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:07:17,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269303938] [2021-11-21 00:07:17,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:07:17,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:07:17,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:17,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:07:17,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:07:17,318 INFO L87 Difference]: Start difference. First operand 591 states and 872 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:07:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:17,351 INFO L93 Difference]: Finished difference Result 603 states and 867 transitions. [2021-11-21 00:07:17,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:07:17,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 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 32 [2021-11-21 00:07:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:17,356 INFO L225 Difference]: With dead ends: 603 [2021-11-21 00:07:17,356 INFO L226 Difference]: Without dead ends: 603 [2021-11-21 00:07:17,356 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 [2021-11-21 00:07:17,357 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:17,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 64 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:07:17,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-21 00:07:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 591. [2021-11-21 00:07:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 535 states have (on average 1.5214953271028038) internal successors, (814), 566 states have internal predecessors, (814), 12 states have call successors, (12), 12 states have call predecessors, (12), 26 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2021-11-21 00:07:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 858 transitions. [2021-11-21 00:07:17,386 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 858 transitions. Word has length 32 [2021-11-21 00:07:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:17,387 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 858 transitions. [2021-11-21 00:07:17,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:07:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 858 transitions. [2021-11-21 00:07:17,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 00:07:17,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:17,388 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:17,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 00:07:17,389 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:07:17,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:17,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1952888920, now seen corresponding path program 1 times [2021-11-21 00:07:17,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:17,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514596636] [2021-11-21 00:07:17,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:17,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:17,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:07:17,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:17,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514596636] [2021-11-21 00:07:17,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514596636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:07:17,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:07:17,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:07:17,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239104516] [2021-11-21 00:07:17,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:07:17,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:07:17,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:17,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:07:17,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:07:17,444 INFO L87 Difference]: Start difference. First operand 591 states and 858 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 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) [2021-11-21 00:07:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:17,498 INFO L93 Difference]: Finished difference Result 594 states and 847 transitions. [2021-11-21 00:07:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:07:17,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 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 33 [2021-11-21 00:07:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:17,502 INFO L225 Difference]: With dead ends: 594 [2021-11-21 00:07:17,503 INFO L226 Difference]: Without dead ends: 594 [2021-11-21 00:07:17,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:07:17,509 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 125 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:17,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 57 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:07:17,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-21 00:07:17,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 591. [2021-11-21 00:07:17,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 535 states have (on average 1.5009345794392523) internal successors, (803), 566 states have internal predecessors, (803), 12 states have call successors, (12), 12 states have call predecessors, (12), 26 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2021-11-21 00:07:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 847 transitions. [2021-11-21 00:07:17,529 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 847 transitions. Word has length 33 [2021-11-21 00:07:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:17,530 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 847 transitions. [2021-11-21 00:07:17,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 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) [2021-11-21 00:07:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 847 transitions. [2021-11-21 00:07:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 00:07:17,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:17,531 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:17,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 00:07:17,532 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:07:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:17,532 INFO L85 PathProgramCache]: Analyzing trace with hash -515440830, now seen corresponding path program 1 times [2021-11-21 00:07:17,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:17,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582451469] [2021-11-21 00:07:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:17,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:07:17,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:17,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582451469] [2021-11-21 00:07:17,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582451469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:17,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571865701] [2021-11-21 00:07:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:17,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:17,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:17,647 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:07:17,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:07:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 00:07:17,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:07:17,909 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-21 00:07:17,910 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 12 treesize of output 18 [2021-11-21 00:07:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:07:18,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:07:18,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-21 00:07:18,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-21 00:07:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:07:18,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571865701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:07:18,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1771240636] [2021-11-21 00:07:18,193 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-21 00:07:18,194 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:07:18,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:07:18,194 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:07:18,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:07:20,983 INFO L354 Elim1Store]: treesize reduction 173, result has 41.0 percent of original size [2021-11-21 00:07:20,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 186 treesize of output 267 [2021-11-21 00:07:23,203 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 179 for LOIs [2021-11-21 00:07:32,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:32,629 INFO L354 Elim1Store]: treesize reduction 62, result has 36.7 percent of original size [2021-11-21 00:07:32,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 62 [2021-11-21 00:07:33,915 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:07:36,451 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:07:36,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:07:36,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2021-11-21 00:07:36,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024864037] [2021-11-21 00:07:36,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:07:36,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:07:36,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:36,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:07:36,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 00:07:36,453 INFO L87 Difference]: Start difference. First operand 591 states and 847 transitions. Second operand has 15 states, 10 states have (on average 7.6) internal successors, (76), 13 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:07:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:37,113 INFO L93 Difference]: Finished difference Result 853 states and 1129 transitions. [2021-11-21 00:07:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:07:37,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 7.6) internal successors, (76), 13 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2021-11-21 00:07:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:37,119 INFO L225 Difference]: With dead ends: 853 [2021-11-21 00:07:37,119 INFO L226 Difference]: Without dead ends: 853 [2021-11-21 00:07:37,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=353, Invalid=1809, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 00:07:37,121 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 692 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:37,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 231 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:07:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-21 00:07:37,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 707. [2021-11-21 00:07:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 639 states have (on average 1.4679186228482004) internal successors, (938), 676 states have internal predecessors, (938), 15 states have call successors, (15), 15 states have call predecessors, (15), 35 states have return successors, (44), 15 states have call predecessors, (44), 15 states have call successors, (44) [2021-11-21 00:07:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 997 transitions. [2021-11-21 00:07:37,152 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 997 transitions. Word has length 34 [2021-11-21 00:07:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:37,152 INFO L470 AbstractCegarLoop]: Abstraction has 707 states and 997 transitions. [2021-11-21 00:07:37,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 7.6) internal successors, (76), 13 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:07:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 997 transitions. [2021-11-21 00:07:37,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 00:07:37,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:37,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:37,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:07:37,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:37,374 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:07:37,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:37,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1201203435, now seen corresponding path program 1 times [2021-11-21 00:07:37,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:37,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427472806] [2021-11-21 00:07:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:37,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:37,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:07:37,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:37,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427472806] [2021-11-21 00:07:37,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427472806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:37,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820638484] [2021-11-21 00:07:37,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:37,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:37,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:37,709 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:07:37,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:07:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:37,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 00:07:37,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:07:38,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-21 00:07:38,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:07:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:07:38,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:07:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:07:38,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820638484] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:07:38,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2011951954] [2021-11-21 00:07:38,444 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-21 00:07:38,444 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:07:38,444 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:07:38,444 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:07:38,444 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:07:41,167 INFO L354 Elim1Store]: treesize reduction 148, result has 41.5 percent of original size [2021-11-21 00:07:41,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 166 treesize of output 237 [2021-11-21 00:07:43,178 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 179 for LOIs [2021-11-21 00:07:51,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:07:51,894 INFO L354 Elim1Store]: treesize reduction 62, result has 36.7 percent of original size [2021-11-21 00:07:51,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 62 [2021-11-21 00:07:53,089 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:07:55,830 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:07:55,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:07:55,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2021-11-21 00:07:55,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948260453] [2021-11-21 00:07:55,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:07:55,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 00:07:55,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:07:55,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 00:07:55,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 00:07:55,831 INFO L87 Difference]: Start difference. First operand 707 states and 997 transitions. Second operand has 22 states, 19 states have (on average 4.421052631578948) internal successors, (84), 18 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:07:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:07:58,127 INFO L93 Difference]: Finished difference Result 593 states and 716 transitions. [2021-11-21 00:07:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-21 00:07:58,127 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 4.421052631578948) internal successors, (84), 18 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-11-21 00:07:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:07:58,131 INFO L225 Difference]: With dead ends: 593 [2021-11-21 00:07:58,131 INFO L226 Difference]: Without dead ends: 593 [2021-11-21 00:07:58,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=733, Invalid=5119, Unknown=0, NotChecked=0, Total=5852 [2021-11-21 00:07:58,134 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 1125 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:07:58,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1125 Valid, 618 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-21 00:07:58,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-21 00:07:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 404. [2021-11-21 00:07:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 360 states have (on average 1.4194444444444445) internal successors, (511), 385 states have internal predecessors, (511), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-21 00:07:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 539 transitions. [2021-11-21 00:07:58,150 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 539 transitions. Word has length 35 [2021-11-21 00:07:58,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:07:58,150 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 539 transitions. [2021-11-21 00:07:58,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 4.421052631578948) internal successors, (84), 18 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:07:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 539 transitions. [2021-11-21 00:07:58,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 00:07:58,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:07:58,151 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:07:58,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:07:58,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:58,364 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:07:58,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:07:58,365 INFO L85 PathProgramCache]: Analyzing trace with hash 174457900, now seen corresponding path program 1 times [2021-11-21 00:07:58,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:07:58,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405045345] [2021-11-21 00:07:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:58,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:07:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:07:58,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:07:58,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405045345] [2021-11-21 00:07:58,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405045345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:58,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828309946] [2021-11-21 00:07:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:07:58,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:07:58,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:58,490 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:07:58,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:07:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:07:58,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 00:07:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:07:58,805 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:07:58,805 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 22 treesize of output 24 [2021-11-21 00:07:58,810 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:07:58,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:07:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:07:59,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:07:59,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828309946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:07:59,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1287434119] [2021-11-21 00:07:59,413 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:07:59,413 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:07:59,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:07:59,413 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:07:59,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:08:01,544 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-21 00:08:01,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 217 [2021-11-21 00:08:01,629 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-21 00:08:01,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 218 treesize of output 263 [2021-11-21 00:08:03,691 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 199 for LOIs [2021-11-21 00:08:15,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:15,061 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-21 00:08:15,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-21 00:08:15,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:15,105 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-21 00:08:15,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-21 00:08:15,990 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:08:18,967 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:08:18,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:08:18,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-11-21 00:08:18,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002378384] [2021-11-21 00:08:18,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:08:18,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:08:18,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:18,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:08:18,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 00:08:18,969 INFO L87 Difference]: Start difference. First operand 404 states and 539 transitions. Second operand has 16 states, 13 states have (on average 4.923076923076923) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:08:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:19,598 INFO L93 Difference]: Finished difference Result 500 states and 618 transitions. [2021-11-21 00:08:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 00:08:19,599 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.923076923076923) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-11-21 00:08:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:19,602 INFO L225 Difference]: With dead ends: 500 [2021-11-21 00:08:19,602 INFO L226 Difference]: Without dead ends: 500 [2021-11-21 00:08:19,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=320, Invalid=2130, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 00:08:19,604 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 386 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:19,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 307 Invalid, 0 Unknown, 228 Unchecked, 0.2s Time] [2021-11-21 00:08:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-21 00:08:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 420. [2021-11-21 00:08:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 376 states have (on average 1.4202127659574468) internal successors, (534), 401 states have internal predecessors, (534), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-21 00:08:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 562 transitions. [2021-11-21 00:08:19,619 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 562 transitions. Word has length 35 [2021-11-21 00:08:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:19,619 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 562 transitions. [2021-11-21 00:08:19,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.923076923076923) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:08:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 562 transitions. [2021-11-21 00:08:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 00:08:19,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:19,620 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:19,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:08:19,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:08:19,844 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:08:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:19,844 INFO L85 PathProgramCache]: Analyzing trace with hash 531798487, now seen corresponding path program 1 times [2021-11-21 00:08:19,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:19,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79807126] [2021-11-21 00:08:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:19,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:08:19,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:19,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79807126] [2021-11-21 00:08:19,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79807126] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:08:19,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:08:19,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-21 00:08:19,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157136694] [2021-11-21 00:08:19,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:08:19,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:08:19,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:19,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:08:19,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:08:19,974 INFO L87 Difference]: Start difference. First operand 420 states and 562 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:08:20,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:20,114 INFO L93 Difference]: Finished difference Result 502 states and 654 transitions. [2021-11-21 00:08:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:08:20,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2021-11-21 00:08:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:20,119 INFO L225 Difference]: With dead ends: 502 [2021-11-21 00:08:20,119 INFO L226 Difference]: Without dead ends: 502 [2021-11-21 00:08:20,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:08:20,120 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 346 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:20,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 83 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:08:20,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-11-21 00:08:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 422. [2021-11-21 00:08:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 378 states have (on average 1.4074074074074074) internal successors, (532), 403 states have internal predecessors, (532), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-21 00:08:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 560 transitions. [2021-11-21 00:08:20,135 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 560 transitions. Word has length 37 [2021-11-21 00:08:20,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:20,136 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 560 transitions. [2021-11-21 00:08:20,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-21 00:08:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 560 transitions. [2021-11-21 00:08:20,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 00:08:20,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:20,137 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:20,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-21 00:08:20,137 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:08:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash 97514305, now seen corresponding path program 1 times [2021-11-21 00:08:20,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:20,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649459514] [2021-11-21 00:08:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:20,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:08:20,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:20,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649459514] [2021-11-21 00:08:20,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649459514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:08:20,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178613029] [2021-11-21 00:08:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:20,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:08:20,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:08:20,246 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:08:20,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:08:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:20,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:08:20,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:08:20,502 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 21 treesize of output 9 [2021-11-21 00:08:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:08:20,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:08:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:08:20,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178613029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:08:20,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1061005008] [2021-11-21 00:08:20,706 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-21 00:08:20,706 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:08:20,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:08:20,707 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:08:20,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:08:23,714 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 179 for LOIs [2021-11-21 00:08:33,307 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:08:35,056 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:08:35,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:08:35,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2021-11-21 00:08:35,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330737565] [2021-11-21 00:08:35,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:08:35,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:08:35,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:35,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:08:35,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-11-21 00:08:35,058 INFO L87 Difference]: Start difference. First operand 422 states and 560 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 3 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:08:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:35,678 INFO L93 Difference]: Finished difference Result 524 states and 660 transitions. [2021-11-21 00:08:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 00:08:35,679 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 3 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2021-11-21 00:08:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:35,682 INFO L225 Difference]: With dead ends: 524 [2021-11-21 00:08:35,682 INFO L226 Difference]: Without dead ends: 524 [2021-11-21 00:08:35,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=291, Invalid=1689, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 00:08:35,683 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 494 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:35,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 329 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:08:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-21 00:08:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 399. [2021-11-21 00:08:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 355 states have (on average 1.4028169014084506) internal successors, (498), 380 states have internal predecessors, (498), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-21 00:08:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 526 transitions. [2021-11-21 00:08:35,697 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 526 transitions. Word has length 37 [2021-11-21 00:08:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:35,697 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 526 transitions. [2021-11-21 00:08:35,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 3 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:08:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 526 transitions. [2021-11-21 00:08:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 00:08:35,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:35,698 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:35,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:08:35,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-21 00:08:35,922 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:08:35,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:35,922 INFO L85 PathProgramCache]: Analyzing trace with hash 50173488, now seen corresponding path program 1 times [2021-11-21 00:08:35,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:35,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429286026] [2021-11-21 00:08:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:35,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:08:35,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429286026] [2021-11-21 00:08:35,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429286026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:08:35,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506180900] [2021-11-21 00:08:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:35,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:08:35,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:08:35,955 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:08:35,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:08:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:36,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:08:36,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:08:36,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:08:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 00:08:36,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:08:36,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506180900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:08:36,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:08:36,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [2] total 6 [2021-11-21 00:08:36,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438329799] [2021-11-21 00:08:36,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:08:36,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:08:36,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:36,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:08:36,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:08:36,226 INFO L87 Difference]: Start difference. First operand 399 states and 526 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:08:36,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:36,274 INFO L93 Difference]: Finished difference Result 313 states and 390 transitions. [2021-11-21 00:08:36,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:08:36,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 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 37 [2021-11-21 00:08:36,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:36,276 INFO L225 Difference]: With dead ends: 313 [2021-11-21 00:08:36,277 INFO L226 Difference]: Without dead ends: 313 [2021-11-21 00:08:36,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:08:36,277 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 55 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:36,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 125 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:08:36,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-21 00:08:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 298. [2021-11-21 00:08:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 261 states have (on average 1.367816091954023) internal successors, (357), 283 states have internal predecessors, (357), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-21 00:08:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 377 transitions. [2021-11-21 00:08:36,286 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 377 transitions. Word has length 37 [2021-11-21 00:08:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:36,287 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 377 transitions. [2021-11-21 00:08:36,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:08:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 377 transitions. [2021-11-21 00:08:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 00:08:36,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:36,288 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:36,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:08:36,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-21 00:08:36,515 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:08:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash 152161774, now seen corresponding path program 3 times [2021-11-21 00:08:36,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:36,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803690507] [2021-11-21 00:08:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:36,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:36,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:08:36,552 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:36,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803690507] [2021-11-21 00:08:36,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803690507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:08:36,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336838642] [2021-11-21 00:08:36,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:08:36,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:08:36,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:08:36,567 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:08:36,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 00:08:36,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:08:36,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:08:36,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:08:36,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:08:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:08:36,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:08:36,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336838642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:08:36,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:08:36,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-11-21 00:08:36,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053386823] [2021-11-21 00:08:36,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:08:36,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:08:36,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:36,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:08:36,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:08:36,690 INFO L87 Difference]: Start difference. First operand 298 states and 377 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:08:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:36,718 INFO L93 Difference]: Finished difference Result 295 states and 353 transitions. [2021-11-21 00:08:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:08:36,719 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 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 37 [2021-11-21 00:08:36,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:36,721 INFO L225 Difference]: With dead ends: 295 [2021-11-21 00:08:36,721 INFO L226 Difference]: Without dead ends: 295 [2021-11-21 00:08:36,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:08:36,722 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 51 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:36,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 130 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:08:36,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-21 00:08:36,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 272. [2021-11-21 00:08:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 235 states have (on average 1.327659574468085) internal successors, (312), 257 states have internal predecessors, (312), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-21 00:08:36,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 332 transitions. [2021-11-21 00:08:36,737 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 332 transitions. Word has length 37 [2021-11-21 00:08:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:36,737 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 332 transitions. [2021-11-21 00:08:36,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:08:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 332 transitions. [2021-11-21 00:08:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 00:08:36,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:36,739 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:36,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:08:36,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-21 00:08:36,954 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr9REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:08:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:36,955 INFO L85 PathProgramCache]: Analyzing trace with hash 150316333, now seen corresponding path program 1 times [2021-11-21 00:08:36,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:36,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490623653] [2021-11-21 00:08:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:36,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:08:36,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:36,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490623653] [2021-11-21 00:08:36,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490623653] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:08:36,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:08:36,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:08:36,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106939205] [2021-11-21 00:08:36,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:08:36,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:08:36,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:36,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:08:36,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:08:36,993 INFO L87 Difference]: Start difference. First operand 272 states and 332 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:08:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:37,035 INFO L93 Difference]: Finished difference Result 284 states and 341 transitions. [2021-11-21 00:08:37,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:08:37,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 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 37 [2021-11-21 00:08:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:37,037 INFO L225 Difference]: With dead ends: 284 [2021-11-21 00:08:37,037 INFO L226 Difference]: Without dead ends: 284 [2021-11-21 00:08:37,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:08:37,038 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 39 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:37,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 71 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:08:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-21 00:08:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 271. [2021-11-21 00:08:37,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 235 states have (on average 1.3106382978723403) internal successors, (308), 256 states have internal predecessors, (308), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-21 00:08:37,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 328 transitions. [2021-11-21 00:08:37,050 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 328 transitions. Word has length 37 [2021-11-21 00:08:37,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:37,050 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 328 transitions. [2021-11-21 00:08:37,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:08:37,051 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 328 transitions. [2021-11-21 00:08:37,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 00:08:37,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:37,051 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:37,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-21 00:08:37,052 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:08:37,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:37,052 INFO L85 PathProgramCache]: Analyzing trace with hash -42763722, now seen corresponding path program 1 times [2021-11-21 00:08:37,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:37,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707531780] [2021-11-21 00:08:37,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:37,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:08:37,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:37,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707531780] [2021-11-21 00:08:37,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707531780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:08:37,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902128525] [2021-11-21 00:08:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:37,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:08:37,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:08:37,338 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:08:37,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 00:08:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:37,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 00:08:37,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:08:37,680 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-21 00:08:37,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-21 00:08:37,692 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-21 00:08:37,693 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 24 treesize of output 26 [2021-11-21 00:08:37,887 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 44 treesize of output 32 [2021-11-21 00:08:37,890 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 29 treesize of output 21 [2021-11-21 00:08:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:08:37,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:08:38,058 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 52 treesize of output 40 [2021-11-21 00:08:38,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-11-21 00:08:38,068 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:08:38,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2021-11-21 00:08:38,320 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-21 00:08:38,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2021-11-21 00:08:38,398 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:08:38,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2021-11-21 00:08:38,439 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-21 00:08:38,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-11-21 00:08:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:08:38,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902128525] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:08:38,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582477066] [2021-11-21 00:08:38,503 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:08:38,503 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:08:38,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:08:38,504 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:08:38,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:08:39,240 INFO L354 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2021-11-21 00:08:39,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2021-11-21 00:08:39,909 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-21 00:08:39,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2021-11-21 00:08:41,086 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-21 00:08:41,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 66 [2021-11-21 00:08:41,121 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 00:08:41,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 36 [2021-11-21 00:08:41,696 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-21 00:08:41,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 66 [2021-11-21 00:08:41,715 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 00:08:41,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 36 [2021-11-21 00:08:42,576 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-21 00:08:43,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:43,345 INFO L354 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2021-11-21 00:08:43,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2021-11-21 00:08:43,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:43,602 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-21 00:08:43,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2021-11-21 00:08:44,027 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:08:45,864 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:08:45,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:08:45,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 10] total 27 [2021-11-21 00:08:45,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827514183] [2021-11-21 00:08:45,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:08:45,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-21 00:08:45,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:45,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-21 00:08:45,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1589, Unknown=0, NotChecked=0, Total=1980 [2021-11-21 00:08:45,866 INFO L87 Difference]: Start difference. First operand 271 states and 328 transitions. Second operand has 28 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 00:08:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:46,500 INFO L93 Difference]: Finished difference Result 314 states and 373 transitions. [2021-11-21 00:08:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 00:08:46,501 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-11-21 00:08:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:46,503 INFO L225 Difference]: With dead ends: 314 [2021-11-21 00:08:46,503 INFO L226 Difference]: Without dead ends: 314 [2021-11-21 00:08:46,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=646, Invalid=2546, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 00:08:46,506 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 201 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:46,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 389 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 338 Invalid, 0 Unknown, 353 Unchecked, 0.2s Time] [2021-11-21 00:08:46,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-21 00:08:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 271. [2021-11-21 00:08:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 235 states have (on average 1.297872340425532) internal successors, (305), 256 states have internal predecessors, (305), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-21 00:08:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 325 transitions. [2021-11-21 00:08:46,514 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 325 transitions. Word has length 39 [2021-11-21 00:08:46,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:46,514 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 325 transitions. [2021-11-21 00:08:46,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 00:08:46,515 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 325 transitions. [2021-11-21 00:08:46,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 00:08:46,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:46,516 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:46,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 00:08:46,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-21 00:08:46,731 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:08:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:46,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1325675335, now seen corresponding path program 1 times [2021-11-21 00:08:46,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:46,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655811482] [2021-11-21 00:08:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:46,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:08:46,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:46,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655811482] [2021-11-21 00:08:46,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655811482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:08:46,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370516169] [2021-11-21 00:08:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:46,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:08:46,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:08:46,825 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:08:46,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 00:08:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:46,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 00:08:46,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:08:46,952 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:08:46,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:08:47,025 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-21 00:08:47,025 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:08:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:08:47,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:08:47,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370516169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:08:47,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1781736706] [2021-11-21 00:08:47,263 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:08:47,263 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:08:47,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:08:47,264 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:08:47,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:08:48,010 INFO L354 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2021-11-21 00:08:48,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2021-11-21 00:08:49,088 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-21 00:08:49,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2021-11-21 00:08:50,452 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-21 00:08:50,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 66 [2021-11-21 00:08:50,466 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 00:08:50,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 36 [2021-11-21 00:08:51,015 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-21 00:08:51,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 66 [2021-11-21 00:08:51,034 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 00:08:51,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 36 [2021-11-21 00:08:51,844 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-21 00:08:52,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:52,583 INFO L354 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2021-11-21 00:08:52,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2021-11-21 00:08:52,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:52,861 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-21 00:08:52,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2021-11-21 00:08:53,243 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:08:54,907 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:08:54,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:08:54,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-21 00:08:54,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718522645] [2021-11-21 00:08:54,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:08:54,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:08:54,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:54,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:08:54,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-11-21 00:08:54,909 INFO L87 Difference]: Start difference. First operand 271 states and 325 transitions. Second operand has 14 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 00:08:55,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:55,073 INFO L93 Difference]: Finished difference Result 305 states and 356 transitions. [2021-11-21 00:08:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 00:08:55,073 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2021-11-21 00:08:55,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:55,075 INFO L225 Difference]: With dead ends: 305 [2021-11-21 00:08:55,075 INFO L226 Difference]: Without dead ends: 305 [2021-11-21 00:08:55,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 00:08:55,076 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 187 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:55,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 361 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 146 Invalid, 0 Unknown, 136 Unchecked, 0.1s Time] [2021-11-21 00:08:55,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-21 00:08:55,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 271. [2021-11-21 00:08:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 235 states have (on average 1.2893617021276595) internal successors, (303), 256 states have internal predecessors, (303), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-21 00:08:55,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 323 transitions. [2021-11-21 00:08:55,084 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 323 transitions. Word has length 40 [2021-11-21 00:08:55,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:55,084 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 323 transitions. [2021-11-21 00:08:55,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 00:08:55,085 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 323 transitions. [2021-11-21 00:08:55,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 00:08:55,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:55,085 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:55,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 00:08:55,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-21 00:08:55,299 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:08:55,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:55,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1574743892, now seen corresponding path program 1 times [2021-11-21 00:08:55,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:55,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663397817] [2021-11-21 00:08:55,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:55,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:08:55,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:55,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663397817] [2021-11-21 00:08:55,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663397817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:08:55,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:08:55,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:08:55,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424875849] [2021-11-21 00:08:55,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:08:55,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:08:55,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:55,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:08:55,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:08:55,342 INFO L87 Difference]: Start difference. First operand 271 states and 323 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:08:55,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:55,350 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2021-11-21 00:08:55,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:08:55,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 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 40 [2021-11-21 00:08:55,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:55,352 INFO L225 Difference]: With dead ends: 207 [2021-11-21 00:08:55,352 INFO L226 Difference]: Without dead ends: 207 [2021-11-21 00:08:55,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:08:55,357 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:55,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:08:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-21 00:08:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-11-21 00:08:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 181 states have (on average 1.1767955801104972) internal successors, (213), 194 states have internal predecessors, (213), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-21 00:08:55,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 230 transitions. [2021-11-21 00:08:55,363 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 230 transitions. Word has length 40 [2021-11-21 00:08:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:55,364 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 230 transitions. [2021-11-21 00:08:55,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:08:55,364 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 230 transitions. [2021-11-21 00:08:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 00:08:55,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:55,365 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:55,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-21 00:08:55,365 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:08:55,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:55,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1853737624, now seen corresponding path program 1 times [2021-11-21 00:08:55,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:55,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448647100] [2021-11-21 00:08:55,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:55,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:08:55,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:55,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448647100] [2021-11-21 00:08:55,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448647100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:08:55,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941628493] [2021-11-21 00:08:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:55,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:08:55,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:08:55,521 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:08:55,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-21 00:08:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:55,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 00:08:55,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:08:55,706 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:08:55,706 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 28 treesize of output 30 [2021-11-21 00:08:55,714 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-21 00:08:55,714 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 27 treesize of output 27 [2021-11-21 00:08:55,844 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-21 00:08:55,844 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 3 case distinctions, treesize of input 32 treesize of output 37 [2021-11-21 00:08:55,851 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-21 00:08:55,852 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 31 treesize of output 29 [2021-11-21 00:08:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:08:56,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:08:56,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941628493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:08:56,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694587757] [2021-11-21 00:08:56,161 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-21 00:08:56,161 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:08:56,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:08:56,161 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:08:56,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:08:56,896 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-21 00:08:56,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2021-11-21 00:08:56,938 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-21 00:08:56,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-11-21 00:08:58,259 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-21 00:08:58,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 66 [2021-11-21 00:08:58,275 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 00:08:58,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 36 [2021-11-21 00:08:58,666 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-21 00:08:58,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 66 [2021-11-21 00:08:58,683 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 00:08:58,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 36 [2021-11-21 00:08:59,510 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-21 00:09:00,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:00,231 INFO L354 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2021-11-21 00:09:00,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2021-11-21 00:09:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:09:00,716 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-21 00:09:00,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2021-11-21 00:09:01,107 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:09:02,809 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:09:02,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:09:02,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2021-11-21 00:09:02,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293624650] [2021-11-21 00:09:02,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:09:02,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 00:09:02,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:09:02,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 00:09:02,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 00:09:02,811 INFO L87 Difference]: Start difference. First operand 207 states and 230 transitions. Second operand has 19 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:09:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:09:05,072 INFO L93 Difference]: Finished difference Result 264 states and 287 transitions. [2021-11-21 00:09:05,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 00:09:05,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2021-11-21 00:09:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:09:05,074 INFO L225 Difference]: With dead ends: 264 [2021-11-21 00:09:05,074 INFO L226 Difference]: Without dead ends: 264 [2021-11-21 00:09:05,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=338, Invalid=2310, Unknown=4, NotChecked=0, Total=2652 [2021-11-21 00:09:05,075 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 264 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:09:05,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 545 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 295 Invalid, 0 Unknown, 241 Unchecked, 0.2s Time] [2021-11-21 00:09:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-21 00:09:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 243. [2021-11-21 00:09:05,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 215 states have (on average 1.1813953488372093) internal successors, (254), 228 states have internal predecessors, (254), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-21 00:09:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 274 transitions. [2021-11-21 00:09:05,105 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 274 transitions. Word has length 41 [2021-11-21 00:09:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:09:05,106 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 274 transitions. [2021-11-21 00:09:05,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:09:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 274 transitions. [2021-11-21 00:09:05,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 00:09:05,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:09:05,107 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:09:05,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-21 00:09:05,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:09:05,327 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:09:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:09:05,327 INFO L85 PathProgramCache]: Analyzing trace with hash 253450462, now seen corresponding path program 1 times [2021-11-21 00:09:05,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:09:05,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717521444] [2021-11-21 00:09:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:05,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:09:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:09:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:09:05,577 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:09:05,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717521444] [2021-11-21 00:09:05,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717521444] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:09:05,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232120867] [2021-11-21 00:09:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:05,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:09:05,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:09:05,579 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:09:05,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 00:09:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:09:05,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-21 00:09:05,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:09:05,919 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:09:05,919 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 22 treesize of output 24 [2021-11-21 00:09:05,924 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:09:05,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:09:06,112 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:09:06,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-21 00:09:06,187 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-21 00:09:06,187 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:09:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:09:06,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:09:06,498 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:09:06,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-21 00:09:06,722 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:09:06,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-21 00:09:06,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232120867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:09:06,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [128080278] [2021-11-21 00:09:06,817 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-21 00:09:06,817 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:09:06,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:09:06,817 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:09:06,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:09:08,633 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-21 00:09:08,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 217 [2021-11-21 00:09:08,697 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-21 00:09:08,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 218 treesize of output 263 [2021-11-21 00:09:10,685 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-21 00:09:10,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 66 [2021-11-21 00:09:10,700 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 00:09:10,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 36 [2021-11-21 00:09:11,151 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-21 00:09:11,152 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 74 treesize of output 66 [2021-11-21 00:09:11,167 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 00:09:11,167 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 48 treesize of output 36 [2021-11-21 00:09:12,167 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-21 00:09:15,439 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-21 00:09:15,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 197 treesize of output 211 [2021-11-21 00:09:15,515 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-21 00:09:15,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 212 treesize of output 257 [2021-11-21 00:09:16,787 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:09:19,262 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:09:19,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:09:19,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 21 [2021-11-21 00:09:19,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380571118] [2021-11-21 00:09:19,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:09:19,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 00:09:19,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:09:19,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 00:09:19,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1917, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 00:09:19,264 INFO L87 Difference]: Start difference. First operand 243 states and 274 transitions. Second operand has 23 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:09:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:09:19,818 INFO L93 Difference]: Finished difference Result 267 states and 287 transitions. [2021-11-21 00:09:19,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 00:09:19,818 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2021-11-21 00:09:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:09:19,819 INFO L225 Difference]: With dead ends: 267 [2021-11-21 00:09:19,819 INFO L226 Difference]: Without dead ends: 267 [2021-11-21 00:09:19,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 85 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=422, Invalid=2770, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 00:09:19,821 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 364 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:09:19,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 561 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 283 Invalid, 0 Unknown, 213 Unchecked, 0.2s Time] [2021-11-21 00:09:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-21 00:09:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 242. [2021-11-21 00:09:19,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 215 states have (on average 1.158139534883721) internal successors, (249), 227 states have internal predecessors, (249), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-21 00:09:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 269 transitions. [2021-11-21 00:09:19,827 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 269 transitions. Word has length 45 [2021-11-21 00:09:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:09:19,828 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 269 transitions. [2021-11-21 00:09:19,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:09:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 269 transitions. [2021-11-21 00:09:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 00:09:19,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:09:19,829 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:09:19,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-21 00:09:20,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-21 00:09:20,047 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:09:20,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:09:20,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1247243395, now seen corresponding path program 1 times [2021-11-21 00:09:20,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:09:20,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167591502] [2021-11-21 00:09:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:20,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:09:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:09:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:09:20,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:09:20,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167591502] [2021-11-21 00:09:20,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167591502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:09:20,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654805651] [2021-11-21 00:09:20,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:20,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:09:20,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:09:20,314 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:09:20,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-21 00:09:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:09:20,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-21 00:09:20,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:09:20,965 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:09:20,965 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 32 treesize of output 36 [2021-11-21 00:09:20,974 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:09:20,974 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 30 treesize of output 32 [2021-11-21 00:09:21,398 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-21 00:09:21,398 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 3 case distinctions, treesize of input 36 treesize of output 41 [2021-11-21 00:09:21,411 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-21 00:09:21,411 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 35 treesize of output 33 [2021-11-21 00:09:22,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:09:22,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-11-21 00:09:22,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:09:22,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:09:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:09:22,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:09:22,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654805651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:09:22,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [819659098] [2021-11-21 00:09:22,468 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-21 00:09:22,468 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:09:22,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:09:22,469 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:09:22,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:09:24,468 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-21 00:09:24,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 217 [2021-11-21 00:09:24,550 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-21 00:09:24,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 218 treesize of output 263 [2021-11-21 00:09:26,442 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-21 00:09:26,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 66 [2021-11-21 00:09:26,459 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 00:09:26,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 36 [2021-11-21 00:09:27,069 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-21 00:09:27,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 66 [2021-11-21 00:09:27,090 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 00:09:27,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 36 [2021-11-21 00:09:27,963 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-21 00:09:31,292 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-21 00:09:31,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 197 treesize of output 211 [2021-11-21 00:09:31,364 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-21 00:09:31,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 212 treesize of output 257 [2021-11-21 00:09:32,727 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:09:35,456 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:09:35,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:09:35,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 23 [2021-11-21 00:09:35,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428578109] [2021-11-21 00:09:35,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:09:35,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 00:09:35,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:09:35,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 00:09:35,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2020, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 00:09:35,458 INFO L87 Difference]: Start difference. First operand 242 states and 269 transitions. Second operand has 25 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:09:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:09:38,595 INFO L93 Difference]: Finished difference Result 264 states and 284 transitions. [2021-11-21 00:09:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 00:09:38,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 47 [2021-11-21 00:09:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:09:38,596 INFO L225 Difference]: With dead ends: 264 [2021-11-21 00:09:38,596 INFO L226 Difference]: Without dead ends: 264 [2021-11-21 00:09:38,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=448, Invalid=3457, Unknown=1, NotChecked=0, Total=3906 [2021-11-21 00:09:38,597 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 334 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:09:38,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 536 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 402 Invalid, 0 Unknown, 300 Unchecked, 0.3s Time] [2021-11-21 00:09:38,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-21 00:09:38,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 241. [2021-11-21 00:09:38,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 215 states have (on average 1.1441860465116278) internal successors, (246), 226 states have internal predecessors, (246), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-21 00:09:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 266 transitions. [2021-11-21 00:09:38,604 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 266 transitions. Word has length 47 [2021-11-21 00:09:38,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:09:38,604 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 266 transitions. [2021-11-21 00:09:38,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-21 00:09:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 266 transitions. [2021-11-21 00:09:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 00:09:38,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:09:38,606 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:09:38,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-21 00:09:38,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:09:38,827 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:09:38,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:09:38,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1071732509, now seen corresponding path program 1 times [2021-11-21 00:09:38,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:09:38,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756496268] [2021-11-21 00:09:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:38,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:09:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:09:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:09:38,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:09:38,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756496268] [2021-11-21 00:09:38,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756496268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:09:38,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691870757] [2021-11-21 00:09:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:38,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:09:38,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:09:38,974 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:09:38,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-21 00:09:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:09:39,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 00:09:39,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:09:39,261 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:09:39,261 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 22 treesize of output 24 [2021-11-21 00:09:39,265 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:09:39,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-21 00:09:39,446 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:09:39,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-21 00:09:39,510 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-21 00:09:39,510 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:09:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:09:39,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:09:40,056 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:09:40,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-21 00:09:40,388 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:09:40,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-21 00:09:40,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691870757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:09:40,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996033943] [2021-11-21 00:09:40,501 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-21 00:09:40,501 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:09:40,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:09:40,501 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:09:40,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:09:42,665 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-21 00:09:42,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 203 treesize of output 217 [2021-11-21 00:09:42,737 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-21 00:09:42,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 218 treesize of output 263 [2021-11-21 00:09:44,660 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-21 00:09:44,661 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 74 treesize of output 66 [2021-11-21 00:09:44,675 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 00:09:44,675 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 48 treesize of output 36 [2021-11-21 00:09:45,363 INFO L354 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2021-11-21 00:09:45,363 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 74 treesize of output 66 [2021-11-21 00:09:45,375 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-21 00:09:45,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 36 [2021-11-21 00:09:46,410 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-21 00:09:50,243 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-21 00:09:50,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 197 treesize of output 211 [2021-11-21 00:09:50,323 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-21 00:09:50,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 212 treesize of output 257 [2021-11-21 00:09:51,778 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:09:54,594 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:09:54,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:09:54,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2021-11-21 00:09:54,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975470722] [2021-11-21 00:09:54,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:09:54,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 00:09:54,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:09:54,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 00:09:54,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1814, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 00:09:54,596 INFO L87 Difference]: Start difference. First operand 241 states and 266 transitions. Second operand has 21 states, 18 states have (on average 5.0) internal successors, (90), 19 states have internal predecessors, (90), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 00:09:55,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:09:55,352 INFO L93 Difference]: Finished difference Result 260 states and 280 transitions. [2021-11-21 00:09:55,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-21 00:09:55,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 5.0) internal successors, (90), 19 states have internal predecessors, (90), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 51 [2021-11-21 00:09:55,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:09:55,354 INFO L225 Difference]: With dead ends: 260 [2021-11-21 00:09:55,354 INFO L226 Difference]: Without dead ends: 260 [2021-11-21 00:09:55,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=543, Invalid=3489, Unknown=0, NotChecked=0, Total=4032 [2021-11-21 00:09:55,356 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 308 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:09:55,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 426 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 237 Invalid, 0 Unknown, 244 Unchecked, 0.2s Time] [2021-11-21 00:09:55,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-21 00:09:55,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 240. [2021-11-21 00:09:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 215 states have (on average 1.1395348837209303) internal successors, (245), 225 states have internal predecessors, (245), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-21 00:09:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 265 transitions. [2021-11-21 00:09:55,362 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 265 transitions. Word has length 51 [2021-11-21 00:09:55,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:09:55,363 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 265 transitions. [2021-11-21 00:09:55,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 5.0) internal successors, (90), 19 states have internal predecessors, (90), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 00:09:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 265 transitions. [2021-11-21 00:09:55,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 00:09:55,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:09:55,364 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:09:55,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-21 00:09:55,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:09:55,590 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:09:55,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:09:55,591 INFO L85 PathProgramCache]: Analyzing trace with hash 86206807, now seen corresponding path program 1 times [2021-11-21 00:09:55,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:09:55,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297802523] [2021-11-21 00:09:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:55,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:09:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:09:55,636 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-21 00:09:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-21 00:09:55,709 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-21 00:09:55,709 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-21 00:09:55,710 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2021-11-21 00:09:55,712 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATION (18 of 20 remaining) [2021-11-21 00:09:55,713 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATION (17 of 20 remaining) [2021-11-21 00:09:55,713 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2021-11-21 00:09:55,713 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2021-11-21 00:09:55,713 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2021-11-21 00:09:55,714 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2021-11-21 00:09:55,714 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATION (12 of 20 remaining) [2021-11-21 00:09:55,714 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATION (11 of 20 remaining) [2021-11-21 00:09:55,714 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATION (10 of 20 remaining) [2021-11-21 00:09:55,715 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATION (9 of 20 remaining) [2021-11-21 00:09:55,715 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2021-11-21 00:09:55,715 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2021-11-21 00:09:55,715 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2021-11-21 00:09:55,715 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2021-11-21 00:09:55,715 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2021-11-21 00:09:55,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2021-11-21 00:09:55,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2021-11-21 00:09:55,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2021-11-21 00:09:55,716 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2021-11-21 00:09:55,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-21 00:09:55,720 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:09:55,724 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-21 00:09:55,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 12:09:55 BoogieIcfgContainer [2021-11-21 00:09:55,820 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-21 00:09:55,821 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-21 00:09:55,821 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-21 00:09:55,822 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-21 00:09:55,822 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:03:17" (3/4) ... [2021-11-21 00:09:55,826 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-21 00:09:55,826 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-21 00:09:55,826 INFO L158 Benchmark]: Toolchain (without parser) took 399917.74ms. Allocated memory was 98.6MB in the beginning and 262.1MB in the end (delta: 163.6MB). Free memory was 63.4MB in the beginning and 146.7MB in the end (delta: -83.2MB). Peak memory consumption was 80.7MB. Max. memory is 16.1GB. [2021-11-21 00:09:55,834 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 98.6MB. Free memory is still 55.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:09:55,834 INFO L158 Benchmark]: CACSL2BoogieTranslator took 640.32ms. Allocated memory is still 98.6MB. Free memory was 63.3MB in the beginning and 63.8MB in the end (delta: -588.0kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 00:09:55,835 INFO L158 Benchmark]: Boogie Procedure Inliner took 85.83ms. Allocated memory is still 98.6MB. Free memory was 63.8MB in the beginning and 61.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:09:55,835 INFO L158 Benchmark]: Boogie Preprocessor took 45.84ms. Allocated memory is still 98.6MB. Free memory was 61.8MB in the beginning and 60.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-21 00:09:55,835 INFO L158 Benchmark]: RCFGBuilder took 588.57ms. Allocated memory is still 98.6MB. Free memory was 60.0MB in the beginning and 45.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-21 00:09:55,835 INFO L158 Benchmark]: TraceAbstraction took 398543.27ms. Allocated memory was 98.6MB in the beginning and 262.1MB in the end (delta: 163.6MB). Free memory was 45.0MB in the beginning and 146.7MB in the end (delta: -101.7MB). Peak memory consumption was 64.4MB. Max. memory is 16.1GB. [2021-11-21 00:09:55,836 INFO L158 Benchmark]: Witness Printer took 4.91ms. Allocated memory is still 262.1MB. Free memory is still 146.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 00:09:55,836 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 98.6MB. Free memory is still 55.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 640.32ms. Allocated memory is still 98.6MB. Free memory was 63.3MB in the beginning and 63.8MB in the end (delta: -588.0kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 85.83ms. Allocated memory is still 98.6MB. Free memory was 63.8MB in the beginning and 61.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.84ms. Allocated memory is still 98.6MB. Free memory was 61.8MB in the beginning and 60.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 588.57ms. Allocated memory is still 98.6MB. Free memory was 60.0MB in the beginning and 45.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 398543.27ms. Allocated memory was 98.6MB in the beginning and 262.1MB in the end (delta: 163.6MB). Free memory was 45.0MB in the beginning and 146.7MB in the end (delta: -101.7MB). Peak memory consumption was 64.4MB. Max. memory is 16.1GB. * Witness Printer took 4.91ms. Allocated memory is still 262.1MB. Free memory is still 146.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 721]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 721. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; [L722] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) [L706] COND FALSE !(\read(*global)) [L708] global = x [L709] state = STATE_2 [L695] RET commands[i].function() [L722] RET parse_input("c1") VAL [commands={6:0}, global={-3:0}, state=1] [L723] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=-3, \old(state)=1, commands={6:0}, global={-3:0}, state=1] [L692] int i = 0; VAL [\old(global)=0, \old(global)=-3, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=-3, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=-3, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=-3, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=-3, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=-3, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=-3, \old(state)=1, commands={6:0}, commands[i].state_needed=0, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) [L706] COND TRUE \read(*global) [L708] global = x [L709] state = STATE_2 [L695] RET commands[i].function() [L723] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L724] CALL parse_input("c2") VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].state_needed=0, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) [L706] COND TRUE \read(*global) [L708] global = x [L709] state = STATE_2 [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={-6:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={-6:0}, state=1] - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 54 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 398.4s, OverallIterations: 34, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 20.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9468 SdHoareTripleChecker+Valid, 7.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9460 mSDsluCounter, 10997 SdHoareTripleChecker+Invalid, 6.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3344 IncrementalHoareTripleChecker+Unchecked, 9405 mSDsCounter, 1206 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8045 IncrementalHoareTripleChecker+Invalid, 12595 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1206 mSolverCounterUnsat, 1795 mSDtfsCounter, 8045 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2252 GetRequests, 1219 SyntacticMatches, 76 SemanticMatches, 957 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15351 ImplicationChecksByTransitivity, 80.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=707occurred in iteration=19, InterpolantAutomatonStates: 470, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 33 MinimizatonAttempts, 1992 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 19.3s InterpolantComputationTime, 1720 NumberOfCodeBlocks, 1719 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1780 ConstructedInterpolants, 224 QuantifiedInterpolants, 25004 SizeOfPredicates, 110 NumberOfNonLiveVariables, 5122 ConjunctsInSsa, 453 ConjunctsInUnsatCore, 61 InterpolantComputations, 13 PerfectInterpolantSequences, 421/1100 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 36.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 29, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 58, TOOLS_POST_TIME: 34.3s, TOOLS_POST_CALL_APPLICATIONS: 5, TOOLS_POST_CALL_TIME: 1.3s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.6s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 65, TOOLS_QUANTIFIERELIM_TIME: 36.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 6.4s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 105, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 5, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 29, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 8.3s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 8.3s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.7s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.7s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 266, DAG_COMPRESSION_RETAINED_NODES: 91, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-21 00:09:55,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P --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 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:09:58,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:09:58,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:09:58,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:09:58,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:09:58,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:09:58,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:09:58,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:09:58,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:09:58,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:09:58,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:09:58,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:09:58,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:09:58,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:09:58,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:09:58,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:09:58,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:09:58,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:09:58,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:09:58,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:09:58,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:09:58,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:09:58,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:09:58,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:09:58,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:09:58,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:09:58,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:09:58,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:09:58,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:09:58,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:09:58,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:09:58,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:09:58,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:09:58,316 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:09:58,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:09:58,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:09:58,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:09:58,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:09:58,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:09:58,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:09:58,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:09:58,341 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-21 00:09:58,366 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:09:58,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:09:58,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:09:58,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:09:58,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:09:58,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:09:58,369 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:09:58,369 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:09:58,369 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:09:58,370 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:09:58,370 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:09:58,370 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:09:58,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 00:09:58,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 00:09:58,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:09:58,372 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:09:58,372 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 00:09:58,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:09:58,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:09:58,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:09:58,373 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 00:09:58,373 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 00:09:58,373 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 00:09:58,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:09:58,374 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 00:09:58,374 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 00:09:58,374 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 00:09:58,375 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:09:58,375 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:09:58,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:09:58,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 00:09:58,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:09:58,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:09:58,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:09:58,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:09:58,377 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 00:09:58,377 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 00:09:58,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:09:58,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:09:58,378 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2021-11-21 00:09:58,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:09:58,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:09:58,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:09:58,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:09:58,734 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:09:58,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-11-21 00:09:58,819 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/data/dff7ccbf3/8dc67a3744654466b4b19281183fd5ab/FLAGca703b2d7 [2021-11-21 00:09:59,516 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:09:59,516 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-11-21 00:09:59,539 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/data/dff7ccbf3/8dc67a3744654466b4b19281183fd5ab/FLAGca703b2d7 [2021-11-21 00:09:59,764 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/data/dff7ccbf3/8dc67a3744654466b4b19281183fd5ab [2021-11-21 00:09:59,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:09:59,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:09:59,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:09:59,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:09:59,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:09:59,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:09:59" (1/1) ... [2021-11-21 00:09:59,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678a76a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:59, skipping insertion in model container [2021-11-21 00:09:59,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:09:59" (1/1) ... [2021-11-21 00:09:59,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:09:59,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:10:00,386 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:10:00,407 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:10:00,483 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:10:00,540 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:10:00,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:10:00 WrapperNode [2021-11-21 00:10:00,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:10:00,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:10:00,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:10:00,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:10:00,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:10:00" (1/1) ... [2021-11-21 00:10:00,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:10:00" (1/1) ... [2021-11-21 00:10:00,630 INFO L137 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2021-11-21 00:10:00,634 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:10:00,635 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:10:00,635 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:10:00,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:10:00,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:10:00" (1/1) ... [2021-11-21 00:10:00,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:10:00" (1/1) ... [2021-11-21 00:10:00,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:10:00" (1/1) ... [2021-11-21 00:10:00,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:10:00" (1/1) ... [2021-11-21 00:10:00,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:10:00" (1/1) ... [2021-11-21 00:10:00,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:10:00" (1/1) ... [2021-11-21 00:10:00,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:10:00" (1/1) ... [2021-11-21 00:10:00,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:10:00,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:10:00,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:10:00,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:10:00,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:10:00" (1/1) ... [2021-11-21 00:10:00,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:10:00,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:10:00,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:10:00,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:10:00,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-21 00:10:00,785 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-11-21 00:10:00,785 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-11-21 00:10:00,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:10:00,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:10:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:10:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:10:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:10:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-21 00:10:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:10:00,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:10:00,915 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:10:00,916 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:10:01,207 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:10:01,213 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:10:01,213 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:10:01,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:10:01 BoogieIcfgContainer [2021-11-21 00:10:01,215 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:10:01,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:10:01,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:10:01,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:10:01,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:09:59" (1/3) ... [2021-11-21 00:10:01,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f325fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:10:01, skipping insertion in model container [2021-11-21 00:10:01,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:10:00" (2/3) ... [2021-11-21 00:10:01,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f325fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:10:01, skipping insertion in model container [2021-11-21 00:10:01,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:10:01" (3/3) ... [2021-11-21 00:10:01,222 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2021-11-21 00:10:01,227 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:10:01,227 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-21 00:10:01,267 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:10:01,274 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 [2021-11-21 00:10:01,275 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-21 00:10:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-21 00:10:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:10:01,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:01,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:10:01,297 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:01,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:01,302 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2021-11-21 00:10:01,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:01,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672938004] [2021-11-21 00:10:01,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:01,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:01,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:01,320 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:01,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 00:10:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:01,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:10:01,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:01,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:01,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:01,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672938004] [2021-11-21 00:10:01,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672938004] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:10:01,689 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:10:01,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-21 00:10:01,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866363726] [2021-11-21 00:10:01,694 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:10:01,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:10:01,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:01,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:10:01,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:10:01,734 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:02,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:02,071 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2021-11-21 00:10:02,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:10:02,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 00:10:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:02,089 INFO L225 Difference]: With dead ends: 120 [2021-11-21 00:10:02,089 INFO L226 Difference]: Without dead ends: 114 [2021-11-21 00:10:02,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:10:02,096 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 100 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:02,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 118 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:10:02,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-21 00:10:02,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2021-11-21 00:10:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.65) internal successors, (99), 77 states have internal predecessors, (99), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-21 00:10:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 117 transitions. [2021-11-21 00:10:02,162 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 117 transitions. Word has length 6 [2021-11-21 00:10:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:02,163 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 117 transitions. [2021-11-21 00:10:02,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:02,163 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 117 transitions. [2021-11-21 00:10:02,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 00:10:02,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:02,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 00:10:02,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:02,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:10:02,377 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:02,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:02,378 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2021-11-21 00:10:02,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:02,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093929301] [2021-11-21 00:10:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:02,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:02,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:02,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:02,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 00:10:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:02,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:10:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:02,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:02,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:02,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093929301] [2021-11-21 00:10:02,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093929301] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:10:02,823 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:10:02,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-21 00:10:02,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29249417] [2021-11-21 00:10:02,824 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:10:02,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:10:02,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:02,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:10:02,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:10:02,826 INFO L87 Difference]: Start difference. First operand 87 states and 117 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:03,385 INFO L93 Difference]: Finished difference Result 223 states and 301 transitions. [2021-11-21 00:10:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:10:03,387 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 00:10:03,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:03,391 INFO L225 Difference]: With dead ends: 223 [2021-11-21 00:10:03,391 INFO L226 Difference]: Without dead ends: 223 [2021-11-21 00:10:03,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:10:03,393 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 223 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:03,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 209 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:10:03,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-21 00:10:03,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 168. [2021-11-21 00:10:03,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 133 states have (on average 1.6466165413533835) internal successors, (219), 151 states have internal predecessors, (219), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-21 00:10:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 256 transitions. [2021-11-21 00:10:03,432 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 256 transitions. Word has length 6 [2021-11-21 00:10:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:03,433 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 256 transitions. [2021-11-21 00:10:03,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 256 transitions. [2021-11-21 00:10:03,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:10:03,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:03,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:03,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:03,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:10:03,647 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:03,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:03,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2021-11-21 00:10:03,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:03,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282743428] [2021-11-21 00:10:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:03,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:03,649 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:03,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 00:10:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:03,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:10:03,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:03,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:10:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:03,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:04,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:04,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282743428] [2021-11-21 00:10:04,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282743428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:10:04,025 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:10:04,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-21 00:10:04,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192671197] [2021-11-21 00:10:04,025 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:10:04,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:10:04,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:04,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:10:04,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:10:04,027 INFO L87 Difference]: Start difference. First operand 168 states and 256 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:04,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:04,512 INFO L93 Difference]: Finished difference Result 246 states and 351 transitions. [2021-11-21 00:10:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:10:04,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 00:10:04,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:04,516 INFO L225 Difference]: With dead ends: 246 [2021-11-21 00:10:04,516 INFO L226 Difference]: Without dead ends: 246 [2021-11-21 00:10:04,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:10:04,518 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 145 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:04,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 272 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:10:04,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-21 00:10:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 171. [2021-11-21 00:10:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.6323529411764706) internal successors, (222), 154 states have internal predecessors, (222), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-21 00:10:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 259 transitions. [2021-11-21 00:10:04,557 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 259 transitions. Word has length 7 [2021-11-21 00:10:04,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:04,558 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 259 transitions. [2021-11-21 00:10:04,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:04,558 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 259 transitions. [2021-11-21 00:10:04,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:10:04,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:04,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:04,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:04,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:10:04,774 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:04,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:04,774 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2021-11-21 00:10:04,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:04,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528204020] [2021-11-21 00:10:04,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:04,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:04,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:04,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:04,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 00:10:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:04,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:10:04,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:05,020 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 29 treesize of output 21 [2021-11-21 00:10:05,024 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 18 treesize of output 10 [2021-11-21 00:10:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:05,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:05,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:05,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528204020] [2021-11-21 00:10:05,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528204020] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:10:05,160 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:10:05,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-21 00:10:05,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234988791] [2021-11-21 00:10:05,161 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:10:05,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:10:05,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:05,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:10:05,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:10:05,162 INFO L87 Difference]: Start difference. First operand 171 states and 259 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:05,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:05,840 INFO L93 Difference]: Finished difference Result 352 states and 461 transitions. [2021-11-21 00:10:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:10:05,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 00:10:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:05,845 INFO L225 Difference]: With dead ends: 352 [2021-11-21 00:10:05,845 INFO L226 Difference]: Without dead ends: 352 [2021-11-21 00:10:05,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:10:05,846 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 286 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:05,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 324 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:10:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-21 00:10:05,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 240. [2021-11-21 00:10:05,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 199 states have (on average 1.5979899497487438) internal successors, (318), 221 states have internal predecessors, (318), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2021-11-21 00:10:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 369 transitions. [2021-11-21 00:10:05,869 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 369 transitions. Word has length 8 [2021-11-21 00:10:05,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:05,869 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 369 transitions. [2021-11-21 00:10:05,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:05,870 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 369 transitions. [2021-11-21 00:10:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:10:05,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:05,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:05,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:06,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:10:06,082 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:06,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:06,082 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2021-11-21 00:10:06,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:06,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682916299] [2021-11-21 00:10:06,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:06,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:06,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:06,084 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:06,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 00:10:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:10:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:06,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:06,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:06,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682916299] [2021-11-21 00:10:06,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682916299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:10:06,285 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:10:06,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 00:10:06,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608572332] [2021-11-21 00:10:06,286 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:10:06,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:10:06,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:06,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:10:06,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:10:06,287 INFO L87 Difference]: Start difference. First operand 240 states and 369 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:06,575 INFO L93 Difference]: Finished difference Result 344 states and 478 transitions. [2021-11-21 00:10:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:10:06,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-21 00:10:06,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:06,580 INFO L225 Difference]: With dead ends: 344 [2021-11-21 00:10:06,581 INFO L226 Difference]: Without dead ends: 344 [2021-11-21 00:10:06,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:10:06,582 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 286 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:06,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 232 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:10:06,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-21 00:10:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 282. [2021-11-21 00:10:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 238 states have (on average 1.5630252100840336) internal successors, (372), 262 states have internal predecessors, (372), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-11-21 00:10:06,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 422 transitions. [2021-11-21 00:10:06,602 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 422 transitions. Word has length 9 [2021-11-21 00:10:06,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:06,602 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 422 transitions. [2021-11-21 00:10:06,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:06,603 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 422 transitions. [2021-11-21 00:10:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 00:10:06,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:06,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:06,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:06,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:10:06,815 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:06,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:06,816 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2021-11-21 00:10:06,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:06,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987102238] [2021-11-21 00:10:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:06,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:06,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:06,819 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:06,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-21 00:10:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:06,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:10:06,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:06,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:07,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:07,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987102238] [2021-11-21 00:10:07,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987102238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:10:07,060 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:10:07,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-21 00:10:07,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401195238] [2021-11-21 00:10:07,060 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:10:07,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:10:07,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:07,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:10:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:10:07,061 INFO L87 Difference]: Start difference. First operand 282 states and 422 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:07,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:07,529 INFO L93 Difference]: Finished difference Result 343 states and 450 transitions. [2021-11-21 00:10:07,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:10:07,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-21 00:10:07,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:07,533 INFO L225 Difference]: With dead ends: 343 [2021-11-21 00:10:07,533 INFO L226 Difference]: Without dead ends: 343 [2021-11-21 00:10:07,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:10:07,539 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 345 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:07,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 266 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:10:07,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-21 00:10:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 283. [2021-11-21 00:10:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 239 states have (on average 1.5606694560669456) internal successors, (373), 263 states have internal predecessors, (373), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-21 00:10:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 416 transitions. [2021-11-21 00:10:07,561 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 416 transitions. Word has length 10 [2021-11-21 00:10:07,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:07,561 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 416 transitions. [2021-11-21 00:10:07,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:07,561 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 416 transitions. [2021-11-21 00:10:07,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:10:07,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:07,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:07,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:07,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:10:07,778 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:07,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:07,778 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2021-11-21 00:10:07,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:07,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189775903] [2021-11-21 00:10:07,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:07,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:07,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:07,780 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:07,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-21 00:10:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:07,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:10:07,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:08,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:10:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:08,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:08,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:08,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189775903] [2021-11-21 00:10:08,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189775903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:08,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [356042319] [2021-11-21 00:10:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:08,338 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:10:08,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:10:08,346 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:10:08,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-21 00:10:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:08,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:10:08,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:08,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:10:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:08,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:09,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [356042319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:09,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322349842] [2021-11-21 00:10:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:09,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:10:09,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:10:09,062 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:10:09,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:10:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:09,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 00:10:09,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:09,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:10:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:09,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:10,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322349842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:10,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:10:10,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 18 [2021-11-21 00:10:10,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456912840] [2021-11-21 00:10:10,102 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:10:10,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:10:10,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:10,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:10:10,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:10:10,104 INFO L87 Difference]: Start difference. First operand 283 states and 416 transitions. Second operand has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:12,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:12,499 INFO L93 Difference]: Finished difference Result 681 states and 929 transitions. [2021-11-21 00:10:12,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-21 00:10:12,499 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 00:10:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:12,504 INFO L225 Difference]: With dead ends: 681 [2021-11-21 00:10:12,504 INFO L226 Difference]: Without dead ends: 681 [2021-11-21 00:10:12,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2021-11-21 00:10:12,506 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1047 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:12,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1047 Valid, 730 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-21 00:10:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-11-21 00:10:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 350. [2021-11-21 00:10:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 305 states have (on average 1.5475409836065575) internal successors, (472), 330 states have internal predecessors, (472), 11 states have call successors, (11), 8 states have call predecessors, (11), 16 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-21 00:10:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 517 transitions. [2021-11-21 00:10:12,532 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 517 transitions. Word has length 15 [2021-11-21 00:10:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:12,533 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 517 transitions. [2021-11-21 00:10:12,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 517 transitions. [2021-11-21 00:10:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 00:10:12,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:12,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:12,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:12,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:12,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:13,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 00:10:13,151 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:13,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:13,151 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2021-11-21 00:10:13,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:13,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115975512] [2021-11-21 00:10:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:13,152 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:13,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:13,153 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:13,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-21 00:10:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:13,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 00:10:13,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:13,583 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 29 treesize of output 21 [2021-11-21 00:10:13,588 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 18 treesize of output 10 [2021-11-21 00:10:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:13,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:13,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:13,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115975512] [2021-11-21 00:10:13,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115975512] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:13,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1907572282] [2021-11-21 00:10:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:13,864 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:10:13,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:10:13,867 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:10:13,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-21 00:10:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:14,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 00:10:14,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:14,294 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 29 treesize of output 21 [2021-11-21 00:10:14,299 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 18 treesize of output 10 [2021-11-21 00:10:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:14,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:14,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1907572282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:14,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263768870] [2021-11-21 00:10:14,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:14,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:10:14,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:10:14,443 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:10:14,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:10:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:14,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 00:10:14,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:15,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:10:15,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-21 00:10:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:15,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:15,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263768870] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:15,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:10:15,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2021-11-21 00:10:15,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850276239] [2021-11-21 00:10:15,574 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:10:15,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 00:10:15,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:15,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 00:10:15,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:10:15,575 INFO L87 Difference]: Start difference. First operand 350 states and 517 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:18,156 INFO L93 Difference]: Finished difference Result 764 states and 1025 transitions. [2021-11-21 00:10:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 00:10:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 00:10:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:18,162 INFO L225 Difference]: With dead ends: 764 [2021-11-21 00:10:18,162 INFO L226 Difference]: Without dead ends: 764 [2021-11-21 00:10:18,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-11-21 00:10:18,164 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 880 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:18,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 935 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 00:10:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-11-21 00:10:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 383. [2021-11-21 00:10:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 338 states have (on average 1.532544378698225) internal successors, (518), 363 states have internal predecessors, (518), 11 states have call successors, (11), 8 states have call predecessors, (11), 16 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-21 00:10:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 563 transitions. [2021-11-21 00:10:18,187 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 563 transitions. Word has length 16 [2021-11-21 00:10:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:18,187 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 563 transitions. [2021-11-21 00:10:18,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 563 transitions. [2021-11-21 00:10:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 00:10:18,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:18,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:18,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:18,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:18,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:18,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:10:18,815 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:18,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199734, now seen corresponding path program 1 times [2021-11-21 00:10:18,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:18,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099934115] [2021-11-21 00:10:18,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:18,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:18,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:18,817 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:18,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-21 00:10:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:18,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:10:18,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:18,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:18,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:18,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099934115] [2021-11-21 00:10:18,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099934115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:10:18,977 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:10:18,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-11-21 00:10:18,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660008825] [2021-11-21 00:10:18,977 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:10:18,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:10:18,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:18,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:10:18,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:10:18,978 INFO L87 Difference]: Start difference. First operand 383 states and 563 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-11-21 00:10:19,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:19,002 INFO L93 Difference]: Finished difference Result 527 states and 771 transitions. [2021-11-21 00:10:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:10:19,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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 18 [2021-11-21 00:10:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:19,006 INFO L225 Difference]: With dead ends: 527 [2021-11-21 00:10:19,006 INFO L226 Difference]: Without dead ends: 527 [2021-11-21 00:10:19,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:10:19,007 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:19,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 108 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:10:19,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-21 00:10:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 510. [2021-11-21 00:10:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 453 states have (on average 1.5253863134657837) internal successors, (691), 483 states have internal predecessors, (691), 15 states have call successors, (15), 11 states have call predecessors, (15), 24 states have return successors, (57), 15 states have call predecessors, (57), 15 states have call successors, (57) [2021-11-21 00:10:19,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 763 transitions. [2021-11-21 00:10:19,028 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 763 transitions. Word has length 18 [2021-11-21 00:10:19,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:19,029 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 763 transitions. [2021-11-21 00:10:19,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-11-21 00:10:19,029 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 763 transitions. [2021-11-21 00:10:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 00:10:19,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:19,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:19,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:19,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:10:19,242 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:19,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:19,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199478, now seen corresponding path program 1 times [2021-11-21 00:10:19,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:19,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214219392] [2021-11-21 00:10:19,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:19,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:19,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:19,244 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:19,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-21 00:10:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:19,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:10:19,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:19,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:19,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:19,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214219392] [2021-11-21 00:10:19,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214219392] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:10:19,497 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:10:19,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 00:10:19,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561662912] [2021-11-21 00:10:19,498 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:10:19,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:10:19,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:19,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:10:19,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:10:19,499 INFO L87 Difference]: Start difference. First operand 510 states and 763 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-11-21 00:10:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:19,538 INFO L93 Difference]: Finished difference Result 560 states and 804 transitions. [2021-11-21 00:10:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:10:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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 18 [2021-11-21 00:10:19,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:19,542 INFO L225 Difference]: With dead ends: 560 [2021-11-21 00:10:19,543 INFO L226 Difference]: Without dead ends: 560 [2021-11-21 00:10:19,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:10:19,544 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 32 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:19,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 108 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:10:19,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-21 00:10:19,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 542. [2021-11-21 00:10:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 482 states have (on average 1.495850622406639) internal successors, (721), 513 states have internal predecessors, (721), 16 states have call successors, (16), 12 states have call predecessors, (16), 26 states have return successors, (59), 16 states have call predecessors, (59), 16 states have call successors, (59) [2021-11-21 00:10:19,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 796 transitions. [2021-11-21 00:10:19,565 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 796 transitions. Word has length 18 [2021-11-21 00:10:19,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:19,565 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 796 transitions. [2021-11-21 00:10:19,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-11-21 00:10:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 796 transitions. [2021-11-21 00:10:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 00:10:19,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:19,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:19,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:19,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:10:19,783 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:19,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:19,783 INFO L85 PathProgramCache]: Analyzing trace with hash 772383166, now seen corresponding path program 1 times [2021-11-21 00:10:19,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:19,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527295147] [2021-11-21 00:10:19,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:19,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:19,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:19,785 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:19,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 00:10:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:19,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:10:19,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:19,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:20,030 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:20,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527295147] [2021-11-21 00:10:20,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527295147] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:10:20,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:10:20,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-21 00:10:20,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052209360] [2021-11-21 00:10:20,031 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:10:20,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:10:20,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:20,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:10:20,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:10:20,032 INFO L87 Difference]: Start difference. First operand 542 states and 796 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:20,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:20,135 INFO L93 Difference]: Finished difference Result 574 states and 804 transitions. [2021-11-21 00:10:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:10:20,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-21 00:10:20,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:20,140 INFO L225 Difference]: With dead ends: 574 [2021-11-21 00:10:20,140 INFO L226 Difference]: Without dead ends: 574 [2021-11-21 00:10:20,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:10:20,141 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 92 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:20,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 149 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:10:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-21 00:10:20,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 544. [2021-11-21 00:10:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 484 states have (on average 1.4834710743801653) internal successors, (718), 515 states have internal predecessors, (718), 16 states have call successors, (16), 12 states have call predecessors, (16), 26 states have return successors, (59), 16 states have call predecessors, (59), 16 states have call successors, (59) [2021-11-21 00:10:20,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 793 transitions. [2021-11-21 00:10:20,163 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 793 transitions. Word has length 19 [2021-11-21 00:10:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:20,166 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 793 transitions. [2021-11-21 00:10:20,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 793 transitions. [2021-11-21 00:10:20,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 00:10:20,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:20,171 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-21 00:10:20,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:20,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:10:20,383 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:20,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:20,383 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 1 times [2021-11-21 00:10:20,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:20,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091897783] [2021-11-21 00:10:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:20,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:20,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:20,385 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:20,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-21 00:10:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:20,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:10:20,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:20,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:20,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:20,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091897783] [2021-11-21 00:10:20,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091897783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:20,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1661307387] [2021-11-21 00:10:20,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:20,620 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:10:20,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:10:20,623 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:10:20,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-21 00:10:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:20,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:10:20,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:20,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:20,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1661307387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:20,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303982625] [2021-11-21 00:10:20,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:20,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:10:20,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:10:20,906 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:10:20,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 00:10:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:20,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:10:20,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:21,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:21,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303982625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:21,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:10:21,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-21 00:10:21,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497725821] [2021-11-21 00:10:21,092 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:10:21,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:10:21,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:21,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:10:21,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:10:21,094 INFO L87 Difference]: Start difference. First operand 544 states and 793 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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) [2021-11-21 00:10:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:21,201 INFO L93 Difference]: Finished difference Result 630 states and 861 transitions. [2021-11-21 00:10:21,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:10:21,202 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-21 00:10:21,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:21,206 INFO L225 Difference]: With dead ends: 630 [2021-11-21 00:10:21,206 INFO L226 Difference]: Without dead ends: 630 [2021-11-21 00:10:21,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:10:21,207 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 182 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:21,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 374 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:10:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-21 00:10:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 460. [2021-11-21 00:10:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 401 states have (on average 1.3865336658354115) internal successors, (556), 431 states have internal predecessors, (556), 16 states have call successors, (16), 12 states have call predecessors, (16), 25 states have return successors, (60), 16 states have call predecessors, (60), 16 states have call successors, (60) [2021-11-21 00:10:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 632 transitions. [2021-11-21 00:10:21,230 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 632 transitions. Word has length 22 [2021-11-21 00:10:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:21,231 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 632 transitions. [2021-11-21 00:10:21,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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) [2021-11-21 00:10:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 632 transitions. [2021-11-21 00:10:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-21 00:10:21,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:21,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:21,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-21 00:10:21,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:21,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:21,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:10:21,835 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:21,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1243788554, now seen corresponding path program 1 times [2021-11-21 00:10:21,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:21,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489094035] [2021-11-21 00:10:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:21,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:21,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:21,837 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:21,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-21 00:10:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:21,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:10:21,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:21,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:21,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:21,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489094035] [2021-11-21 00:10:21,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489094035] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:10:21,991 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:10:21,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 00:10:21,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756064749] [2021-11-21 00:10:21,991 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:10:21,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:10:21,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:10:21,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:10:21,993 INFO L87 Difference]: Start difference. First operand 460 states and 632 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-11-21 00:10:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:22,008 INFO L93 Difference]: Finished difference Result 333 states and 440 transitions. [2021-11-21 00:10:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:10:22,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2021-11-21 00:10:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:22,011 INFO L225 Difference]: With dead ends: 333 [2021-11-21 00:10:22,011 INFO L226 Difference]: Without dead ends: 333 [2021-11-21 00:10:22,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:10:22,012 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:22,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 127 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:10:22,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-21 00:10:22,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 332. [2021-11-21 00:10:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 286 states have (on average 1.367132867132867) internal successors, (391), 312 states have internal predecessors, (391), 11 states have call successors, (11), 8 states have call predecessors, (11), 17 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2021-11-21 00:10:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 439 transitions. [2021-11-21 00:10:22,024 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 439 transitions. Word has length 25 [2021-11-21 00:10:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:22,024 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 439 transitions. [2021-11-21 00:10:22,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-11-21 00:10:22,024 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 439 transitions. [2021-11-21 00:10:22,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 00:10:22,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:22,026 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:22,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:22,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:10:22,237 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:22,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:22,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1125506638, now seen corresponding path program 1 times [2021-11-21 00:10:22,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:22,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890328276] [2021-11-21 00:10:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:22,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:22,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:22,239 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:22,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-21 00:10:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:22,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 00:10:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:22,800 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:10:22,800 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 27 treesize of output 29 [2021-11-21 00:10:22,806 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:10:22,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-21 00:10:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:22,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:37,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:37,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890328276] [2021-11-21 00:10:37,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890328276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:37,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1474143820] [2021-11-21 00:10:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:37,877 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:10:37,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:10:37,879 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:10:37,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-21 00:10:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:38,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 00:10:38,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:38,556 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:10:38,556 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 27 treesize of output 29 [2021-11-21 00:10:38,565 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:10:38,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-21 00:10:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:38,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:48,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1474143820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751999045] [2021-11-21 00:10:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:48,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:10:48,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:10:48,360 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:10:48,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-21 00:10:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:48,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 00:10:48,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:48,789 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:10:48,790 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 28 treesize of output 30 [2021-11-21 00:10:48,797 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:10:48,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-21 00:10:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:48,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:57,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751999045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:57,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:10:57,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2021-11-21 00:10:57,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609486835] [2021-11-21 00:10:57,828 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:10:57,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:10:57,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:57,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:10:57,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=94, Unknown=3, NotChecked=0, Total=132 [2021-11-21 00:10:57,830 INFO L87 Difference]: Start difference. First operand 332 states and 439 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:10:58,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:58,503 INFO L93 Difference]: Finished difference Result 339 states and 446 transitions. [2021-11-21 00:10:58,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:10:58,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-21 00:10:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:58,506 INFO L225 Difference]: With dead ends: 339 [2021-11-21 00:10:58,506 INFO L226 Difference]: Without dead ends: 339 [2021-11-21 00:10:58,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=42, Invalid=111, Unknown=3, NotChecked=0, Total=156 [2021-11-21 00:10:58,507 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 103 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:58,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 308 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 173 Unchecked, 0.6s Time] [2021-11-21 00:10:58,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-21 00:10:58,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 335. [2021-11-21 00:10:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 289 states have (on average 1.3633217993079585) internal successors, (394), 314 states have internal predecessors, (394), 11 states have call successors, (11), 9 states have call predecessors, (11), 17 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2021-11-21 00:10:58,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 442 transitions. [2021-11-21 00:10:58,518 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 442 transitions. Word has length 27 [2021-11-21 00:10:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:58,519 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 442 transitions. [2021-11-21 00:10:58,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:10:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 442 transitions. [2021-11-21 00:10:58,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 00:10:58,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:58,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:58,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:58,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:58,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:59,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:10:59,140 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:10:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:59,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1031478775, now seen corresponding path program 1 times [2021-11-21 00:10:59,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:10:59,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446656705] [2021-11-21 00:10:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:59,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:10:59,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:10:59,142 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:10:59,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-21 00:10:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:59,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:10:59,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:59,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:10:59,872 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:10:59,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446656705] [2021-11-21 00:10:59,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446656705] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:10:59,872 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:10:59,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 11 [2021-11-21 00:10:59,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047444453] [2021-11-21 00:10:59,873 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:10:59,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:10:59,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:10:59,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:10:59,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:10:59,874 INFO L87 Difference]: Start difference. First operand 335 states and 442 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:11:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:00,194 INFO L93 Difference]: Finished difference Result 382 states and 490 transitions. [2021-11-21 00:11:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:11:00,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-21 00:11:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:00,197 INFO L225 Difference]: With dead ends: 382 [2021-11-21 00:11:00,197 INFO L226 Difference]: Without dead ends: 382 [2021-11-21 00:11:00,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:11:00,198 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 140 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:00,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 285 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:11:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-21 00:11:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 336. [2021-11-21 00:11:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 291 states have (on average 1.3608247422680413) internal successors, (396), 315 states have internal predecessors, (396), 11 states have call successors, (11), 9 states have call predecessors, (11), 16 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-21 00:11:00,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 439 transitions. [2021-11-21 00:11:00,210 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 439 transitions. Word has length 28 [2021-11-21 00:11:00,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:00,211 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 439 transitions. [2021-11-21 00:11:00,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:11:00,211 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 439 transitions. [2021-11-21 00:11:00,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-21 00:11:00,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:00,212 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:00,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-21 00:11:00,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:11:00,423 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:11:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash -253201523, now seen corresponding path program 1 times [2021-11-21 00:11:00,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:11:00,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503608244] [2021-11-21 00:11:00,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:00,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:11:00,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:11:00,425 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:11:00,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-21 00:11:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:00,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:11:00,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:11:00,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:11:00,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:11:00,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503608244] [2021-11-21 00:11:00,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503608244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:00,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [598991141] [2021-11-21 00:11:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:00,885 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:11:00,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:11:00,894 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:11:00,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-21 00:11:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:01,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:11:01,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:11:01,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:11:01,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [598991141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:01,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450875281] [2021-11-21 00:11:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:01,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:01,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:11:01,411 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:11:01,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-21 00:11:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:01,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:11:01,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:11:01,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:11:01,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450875281] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:01,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:11:01,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2021-11-21 00:11:01,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289781127] [2021-11-21 00:11:01,850 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:11:01,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:11:01,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:11:01,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:11:01,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:11:01,851 INFO L87 Difference]: Start difference. First operand 336 states and 439 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:11:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:02,644 INFO L93 Difference]: Finished difference Result 452 states and 557 transitions. [2021-11-21 00:11:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 00:11:02,645 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-21 00:11:02,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:02,648 INFO L225 Difference]: With dead ends: 452 [2021-11-21 00:11:02,648 INFO L226 Difference]: Without dead ends: 452 [2021-11-21 00:11:02,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-11-21 00:11:02,649 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 418 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:02,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 372 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:11:02,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-21 00:11:02,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 405. [2021-11-21 00:11:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 357 states have (on average 1.3361344537815125) internal successors, (477), 383 states have internal predecessors, (477), 11 states have call successors, (11), 10 states have call predecessors, (11), 19 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2021-11-21 00:11:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 519 transitions. [2021-11-21 00:11:02,669 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 519 transitions. Word has length 30 [2021-11-21 00:11:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:02,670 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 519 transitions. [2021-11-21 00:11:02,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:11:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 519 transitions. [2021-11-21 00:11:02,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-21 00:11:02,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:02,671 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:02,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-21 00:11:02,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-21 00:11:03,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-21 00:11:03,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 00:11:03,295 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:11:03,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:03,295 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2021-11-21 00:11:03,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:11:03,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996991359] [2021-11-21 00:11:03,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:03,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:11:03,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:11:03,297 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:11:03,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-21 00:11:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:03,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:11:03,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:11:03,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:11:03,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:11:03,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996991359] [2021-11-21 00:11:03,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996991359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:03,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1472602739] [2021-11-21 00:11:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:03,799 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:11:03,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:11:03,803 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:11:03,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-21 00:11:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:03,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:11:03,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:11:04,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:11:04,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1472602739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:04,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133865449] [2021-11-21 00:11:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:04,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:04,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:11:04,272 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:11:04,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-21 00:11:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:04,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:11:04,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:11:04,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:11:04,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133865449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:04,656 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:11:04,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2021-11-21 00:11:04,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332028687] [2021-11-21 00:11:04,656 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:11:04,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:11:04,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:11:04,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:11:04,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:11:04,658 INFO L87 Difference]: Start difference. First operand 405 states and 519 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:11:05,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:05,213 INFO L93 Difference]: Finished difference Result 500 states and 602 transitions. [2021-11-21 00:11:05,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:11:05,215 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-11-21 00:11:05,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:05,217 INFO L225 Difference]: With dead ends: 500 [2021-11-21 00:11:05,217 INFO L226 Difference]: Without dead ends: 500 [2021-11-21 00:11:05,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:11:05,218 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 448 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:05,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 223 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:11:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-21 00:11:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 464. [2021-11-21 00:11:05,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 414 states have (on average 1.3309178743961352) internal successors, (551), 441 states have internal predecessors, (551), 11 states have call successors, (11), 11 states have call predecessors, (11), 21 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-11-21 00:11:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 588 transitions. [2021-11-21 00:11:05,233 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 588 transitions. Word has length 31 [2021-11-21 00:11:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:05,233 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 588 transitions. [2021-11-21 00:11:05,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:11:05,234 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 588 transitions. [2021-11-21 00:11:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 00:11:05,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:05,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:05,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-21 00:11:05,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-21 00:11:05,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-21 00:11:05,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:05,847 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:11:05,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:05,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1377524307, now seen corresponding path program 1 times [2021-11-21 00:11:05,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:11:05,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433571166] [2021-11-21 00:11:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:05,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:11:05,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:11:05,849 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:11:05,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-21 00:11:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:05,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 00:11:05,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:06,328 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:11:06,329 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 26 treesize of output 28 [2021-11-21 00:11:06,337 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:11:06,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 00:11:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:11:06,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:11:21,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:11:21,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433571166] [2021-11-21 00:11:21,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433571166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:21,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1002960651] [2021-11-21 00:11:21,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:21,945 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:11:21,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:11:21,946 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:11:21,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-21 00:11:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:22,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 00:11:22,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:22,446 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:11:22,446 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 29 treesize of output 31 [2021-11-21 00:11:22,452 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:11:22,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-11-21 00:11:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:11:22,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:30,404 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_parse_input_c1_~x~0#1.base_24| (_ BitVec 32))) (and (let ((.cse0 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (or (not (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_24| (_ bv1 32)) |c_~#commands~0.base|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_24|))))))))) (forall ((|v_parse_input_c1_~x~0#1.base_29| (_ BitVec 32))) (or (let ((.cse1 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (and (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse1) (bvule .cse1 (select (store |c_#length| |v_parse_input_c1_~x~0#1.base_29| (_ bv1 32)) |c_~#commands~0.base|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_parse_input_c1_~x~0#1.base_29|))))))) is different from true [2021-11-21 00:11:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-21 00:11:31,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1002960651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:31,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164643398] [2021-11-21 00:11:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:31,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:31,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:11:31,586 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:11:31,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-21 00:11:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:31,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 00:11:31,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:31,984 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:11:31,984 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 26 treesize of output 28 [2021-11-21 00:11:31,989 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:11:31,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-11-21 00:11:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:11:32,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:11:43,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164643398] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:43,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:11:43,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2021-11-21 00:11:43,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805374719] [2021-11-21 00:11:43,554 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:11:43,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:11:43,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:11:43,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:11:43,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=4, NotChecked=20, Total=156 [2021-11-21 00:11:43,555 INFO L87 Difference]: Start difference. First operand 464 states and 588 transitions. Second operand has 13 states, 12 states have (on average 6.083333333333333) internal successors, (73), 10 states have internal predecessors, (73), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:11:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:44,472 INFO L93 Difference]: Finished difference Result 509 states and 638 transitions. [2021-11-21 00:11:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:11:44,474 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.083333333333333) internal successors, (73), 10 states have internal predecessors, (73), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-21 00:11:44,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:44,477 INFO L225 Difference]: With dead ends: 509 [2021-11-21 00:11:44,477 INFO L226 Difference]: Without dead ends: 509 [2021-11-21 00:11:44,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=4, NotChecked=26, Total=240 [2021-11-21 00:11:44,478 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 86 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:44,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 230 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 198 Unchecked, 0.4s Time] [2021-11-21 00:11:44,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-21 00:11:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 481. [2021-11-21 00:11:44,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 429 states have (on average 1.3216783216783217) internal successors, (567), 456 states have internal predecessors, (567), 12 states have call successors, (12), 12 states have call predecessors, (12), 22 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2021-11-21 00:11:44,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 609 transitions. [2021-11-21 00:11:44,494 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 609 transitions. Word has length 33 [2021-11-21 00:11:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:44,495 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 609 transitions. [2021-11-21 00:11:44,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.083333333333333) internal successors, (73), 10 states have internal predecessors, (73), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:11:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 609 transitions. [2021-11-21 00:11:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 00:11:44,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:44,497 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:44,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-21 00:11:44,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-21 00:11:44,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-21 00:11:45,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:45,100 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:11:45,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:45,101 INFO L85 PathProgramCache]: Analyzing trace with hash 952776277, now seen corresponding path program 1 times [2021-11-21 00:11:45,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:11:45,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001215030] [2021-11-21 00:11:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:45,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:11:45,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:11:45,102 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:11:45,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-21 00:11:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:45,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:11:45,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:45,567 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:11:45,567 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 30 treesize of output 32 [2021-11-21 00:11:45,573 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:11:45,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-11-21 00:11:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:11:45,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:03,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:12:03,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001215030] [2021-11-21 00:12:03,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001215030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:12:03,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1520739563] [2021-11-21 00:12:03,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:03,232 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:12:03,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:12:03,233 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:12:03,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-21 00:12:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:03,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:12:03,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:03,747 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:12:03,747 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 27 treesize of output 29 [2021-11-21 00:12:03,752 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:12:03,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-21 00:12:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:03,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:14,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1520739563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:12:14,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557957254] [2021-11-21 00:12:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:14,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:14,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:14,716 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:12:14,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-21 00:12:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:14,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:12:14,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:15,126 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:12:15,126 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 28 treesize of output 30 [2021-11-21 00:12:15,133 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:12:15,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-21 00:12:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:15,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:28,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557957254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:12:28,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:12:28,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 12 [2021-11-21 00:12:28,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245339368] [2021-11-21 00:12:28,098 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:12:28,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 00:12:28,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:12:28,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 00:12:28,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=132, Unknown=6, NotChecked=0, Total=182 [2021-11-21 00:12:28,099 INFO L87 Difference]: Start difference. First operand 481 states and 609 transitions. Second operand has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 11 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:12:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:30,322 INFO L93 Difference]: Finished difference Result 639 states and 799 transitions. [2021-11-21 00:12:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 00:12:30,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 11 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-11-21 00:12:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:30,326 INFO L225 Difference]: With dead ends: 639 [2021-11-21 00:12:30,326 INFO L226 Difference]: Without dead ends: 639 [2021-11-21 00:12:30,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 187 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=108, Invalid=306, Unknown=6, NotChecked=0, Total=420 [2021-11-21 00:12:30,327 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 426 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:30,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 513 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 119 Invalid, 0 Unknown, 412 Unchecked, 1.1s Time] [2021-11-21 00:12:30,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-11-21 00:12:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 587. [2021-11-21 00:12:30,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 529 states have (on average 1.3610586011342154) internal successors, (720), 558 states have internal predecessors, (720), 14 states have call successors, (14), 14 states have call predecessors, (14), 26 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2021-11-21 00:12:30,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 770 transitions. [2021-11-21 00:12:30,348 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 770 transitions. Word has length 35 [2021-11-21 00:12:30,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:30,349 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 770 transitions. [2021-11-21 00:12:30,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 11 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:12:30,349 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 770 transitions. [2021-11-21 00:12:30,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 00:12:30,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:30,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:30,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:30,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:30,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:30,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:30,971 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr9REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:12:30,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:30,971 INFO L85 PathProgramCache]: Analyzing trace with hash 950930836, now seen corresponding path program 1 times [2021-11-21 00:12:30,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:12:30,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038886498] [2021-11-21 00:12:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:30,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:12:30,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:12:30,973 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:12:31,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-21 00:12:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:31,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 00:12:31,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:12:31,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:31,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-21 00:12:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:32,175 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:12:32,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038886498] [2021-11-21 00:12:32,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038886498] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:12:32,175 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:12:32,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-21 00:12:32,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364520562] [2021-11-21 00:12:32,176 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:12:32,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:12:32,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:12:32,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:12:32,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:12:32,177 INFO L87 Difference]: Start difference. First operand 587 states and 770 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:12:32,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:32,931 INFO L93 Difference]: Finished difference Result 676 states and 856 transitions. [2021-11-21 00:12:32,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:12:32,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-11-21 00:12:32,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:32,936 INFO L225 Difference]: With dead ends: 676 [2021-11-21 00:12:32,936 INFO L226 Difference]: Without dead ends: 676 [2021-11-21 00:12:32,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:12:32,938 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 156 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:32,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 175 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:12:32,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-11-21 00:12:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 586. [2021-11-21 00:12:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 529 states have (on average 1.3402646502835538) internal successors, (709), 557 states have internal predecessors, (709), 14 states have call successors, (14), 14 states have call predecessors, (14), 26 states have return successors, (36), 14 states have call predecessors, (36), 14 states have call successors, (36) [2021-11-21 00:12:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 759 transitions. [2021-11-21 00:12:32,955 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 759 transitions. Word has length 35 [2021-11-21 00:12:32,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:32,956 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 759 transitions. [2021-11-21 00:12:32,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:12:32,956 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 759 transitions. [2021-11-21 00:12:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:12:32,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:32,957 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:32,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:33,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:12:33,168 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:12:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1567291088, now seen corresponding path program 1 times [2021-11-21 00:12:33,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:12:33,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1937463756] [2021-11-21 00:12:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:33,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:12:33,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:12:33,171 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:12:33,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-21 00:12:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:33,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:12:33,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:33,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-21 00:12:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:33,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:34,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:12:34,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1937463756] [2021-11-21 00:12:34,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1937463756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:12:34,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [518142818] [2021-11-21 00:12:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:34,597 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:12:34,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:12:34,598 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:12:34,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-21 00:12:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:34,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 00:12:34,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:35,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 24 treesize of output 29 [2021-11-21 00:12:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:12:35,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:12:35,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [518142818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:12:35,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703415157] [2021-11-21 00:12:35,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:35,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:35,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:35,882 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:12:35,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-21 00:12:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:35,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:12:35,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:37,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-21 00:12:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:37,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:40,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703415157] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:12:40,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:12:40,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4, 4, 9, 9] total 37 [2021-11-21 00:12:40,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155046274] [2021-11-21 00:12:40,897 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:12:40,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-21 00:12:40,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:12:40,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-21 00:12:40,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2021-11-21 00:12:40,899 INFO L87 Difference]: Start difference. First operand 586 states and 759 transitions. Second operand has 38 states, 38 states have (on average 4.657894736842105) internal successors, (177), 33 states have internal predecessors, (177), 9 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:12:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:51,994 INFO L93 Difference]: Finished difference Result 383 states and 445 transitions. [2021-11-21 00:12:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-21 00:12:51,995 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.657894736842105) internal successors, (177), 33 states have internal predecessors, (177), 9 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2021-11-21 00:12:51,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:51,996 INFO L225 Difference]: With dead ends: 383 [2021-11-21 00:12:51,996 INFO L226 Difference]: Without dead ends: 383 [2021-11-21 00:12:51,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=921, Invalid=4049, Unknown=0, NotChecked=0, Total=4970 [2021-11-21 00:12:51,998 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 989 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:51,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 428 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-21 00:12:52,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-21 00:12:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 316. [2021-11-21 00:12:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 279 states have (on average 1.3225806451612903) internal successors, (369), 301 states have internal predecessors, (369), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-21 00:12:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 391 transitions. [2021-11-21 00:12:52,008 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 391 transitions. Word has length 36 [2021-11-21 00:12:52,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:52,008 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 391 transitions. [2021-11-21 00:12:52,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.657894736842105) internal successors, (177), 33 states have internal predecessors, (177), 9 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:12:52,009 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 391 transitions. [2021-11-21 00:12:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 00:12:52,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:52,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:52,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:52,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:52,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:52,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:52,621 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:12:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:52,621 INFO L85 PathProgramCache]: Analyzing trace with hash -948350694, now seen corresponding path program 1 times [2021-11-21 00:12:52,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:12:52,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430038699] [2021-11-21 00:12:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:52,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:12:52,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:12:52,624 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:12:52,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-21 00:12:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:52,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:12:52,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:53,148 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:12:53,149 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 29 treesize of output 31 [2021-11-21 00:12:53,155 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:12:53,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-11-21 00:12:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:53,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:58,842 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_parse_input_c1_~x~0#1.base_51| (_ BitVec 32))) (and (let ((.cse0 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (or (not (bvule .cse0 (select (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_51| (_ bv1 32)) |c_~#commands~0.base|))) (not (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse0)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_51|))))))) (let ((.cse1 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (and (bvule .cse1 (select |c_#length| |c_~#commands~0.base|)) (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse1)))) is different from true [2021-11-21 00:13:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:03,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:13:03,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430038699] [2021-11-21 00:13:03,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430038699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:13:03,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [257431997] [2021-11-21 00:13:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:03,224 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:13:03,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:13:03,230 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:13:03,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-21 00:13:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:03,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:13:03,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:03,854 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:13:03,855 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 28 treesize of output 30 [2021-11-21 00:13:03,862 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:13:03,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-21 00:13:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:04,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:13:09,232 WARN L860 $PredicateComparison]: unable to prove that (or (let ((.cse0 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (and (bvule .cse0 (select |c_#length| |c_~#commands~0.base|)) (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse0))) (exists ((|v_parse_input_c1_~x~0#1.base_51| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_51|)))) (let ((.cse1 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_51| (_ bv1 32)) |c_~#commands~0.base|))) (not (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse1))))))) is different from true [2021-11-21 00:13:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:12,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [257431997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:13:12,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35381714] [2021-11-21 00:13:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:12,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:13:12,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:13:12,710 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:13:12,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-21 00:13:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:12,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 00:13:12,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:13,159 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:13:13,159 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 28 treesize of output 30 [2021-11-21 00:13:13,166 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:13:13,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-21 00:13:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:13,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:13:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:18,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35381714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:13:18,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:13:18,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-21 00:13:18,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65607847] [2021-11-21 00:13:18,858 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:13:18,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:13:18,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:13:18,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:13:18,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=121, Unknown=3, NotChecked=46, Total=210 [2021-11-21 00:13:18,859 INFO L87 Difference]: Start difference. First operand 316 states and 391 transitions. Second operand has 15 states, 14 states have (on average 5.928571428571429) internal successors, (83), 12 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:13:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:13:20,973 INFO L93 Difference]: Finished difference Result 347 states and 410 transitions. [2021-11-21 00:13:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:13:20,977 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.928571428571429) internal successors, (83), 12 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-11-21 00:13:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:13:20,978 INFO L225 Difference]: With dead ends: 347 [2021-11-21 00:13:20,978 INFO L226 Difference]: Without dead ends: 347 [2021-11-21 00:13:20,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 222 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=110, Invalid=315, Unknown=3, NotChecked=78, Total=506 [2021-11-21 00:13:20,979 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 294 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:13:20,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 346 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 112 Invalid, 0 Unknown, 506 Unchecked, 1.0s Time] [2021-11-21 00:13:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-21 00:13:20,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 316. [2021-11-21 00:13:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 279 states have (on average 1.3189964157706093) internal successors, (368), 301 states have internal predecessors, (368), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-21 00:13:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 390 transitions. [2021-11-21 00:13:20,987 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 390 transitions. Word has length 41 [2021-11-21 00:13:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:13:20,987 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 390 transitions. [2021-11-21 00:13:20,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.928571428571429) internal successors, (83), 12 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:13:20,988 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 390 transitions. [2021-11-21 00:13:20,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:13:20,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:13:20,989 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:13:21,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:21,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:21,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-21 00:13:21,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:13:21,603 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:13:21,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:13:21,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1419217069, now seen corresponding path program 1 times [2021-11-21 00:13:21,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:13:21,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412493932] [2021-11-21 00:13:21,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:21,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:13:21,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:13:21,605 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:13:21,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-21 00:13:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:21,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 00:13:21,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:22,459 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:13:22,459 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 35 treesize of output 37 [2021-11-21 00:13:22,475 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-21 00:13:22,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 32 [2021-11-21 00:13:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:13:22,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:13:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:13:42,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:13:42,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412493932] [2021-11-21 00:13:42,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412493932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:13:42,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [859901898] [2021-11-21 00:13:42,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:13:42,098 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:13:42,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:13:42,105 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:13:42,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-21 00:13:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:13:42,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:13:42,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:13:43,090 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:13:43,091 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 29 treesize of output 31 [2021-11-21 00:13:43,098 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:13:43,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-11-21 00:13:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:13:45,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:14:01,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [859901898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:14:01,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74476523] [2021-11-21 00:14:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:01,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:01,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:01,405 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:14:01,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-21 00:14:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:01,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:14:01,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:02,131 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:14:02,132 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 28 treesize of output 30 [2021-11-21 00:14:02,137 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:14:02,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-21 00:14:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:14:02,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:14:16,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74476523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:14:16,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 00:14:16,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 13 [2021-11-21 00:14:16,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640640120] [2021-11-21 00:14:16,246 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 00:14:16,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:14:16,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:14:16,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:14:16,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=149, Unknown=6, NotChecked=0, Total=210 [2021-11-21 00:14:16,248 INFO L87 Difference]: Start difference. First operand 316 states and 390 transitions. Second operand has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 00:14:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:16,379 INFO L93 Difference]: Finished difference Result 320 states and 397 transitions. [2021-11-21 00:14:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:14:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2021-11-21 00:14:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:16,381 INFO L225 Difference]: With dead ends: 320 [2021-11-21 00:14:16,381 INFO L226 Difference]: Without dead ends: 320 [2021-11-21 00:14:16,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 258 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 42.2s TimeCoverageRelationStatistics Valid=55, Invalid=149, Unknown=6, NotChecked=0, Total=210 [2021-11-21 00:14:16,382 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:16,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 235 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2021-11-21 00:14:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-21 00:14:16,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2021-11-21 00:14:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 282 states have (on average 1.3156028368794326) internal successors, (371), 303 states have internal predecessors, (371), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-21 00:14:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 397 transitions. [2021-11-21 00:14:16,391 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 397 transitions. Word has length 48 [2021-11-21 00:14:16,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:16,391 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 397 transitions. [2021-11-21 00:14:16,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-21 00:14:16,392 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 397 transitions. [2021-11-21 00:14:16,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:14:16,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:16,393 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:16,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-21 00:14:16,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-21 00:14:16,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2021-11-21 00:14:17,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 00:14:17,005 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:14:17,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:17,006 INFO L85 PathProgramCache]: Analyzing trace with hash -455995401, now seen corresponding path program 2 times [2021-11-21 00:14:17,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:14:17,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187318582] [2021-11-21 00:14:17,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:14:17,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:14:17,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:14:17,007 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:14:17,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-21 00:14:17,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:14:17,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:14:17,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:14:17,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:14:17,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:17,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-21 00:14:17,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 00:14:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:14:18,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:14:18,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187318582] [2021-11-21 00:14:18,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187318582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:14:18,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [183105869] [2021-11-21 00:14:18,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:14:18,541 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:14:18,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:14:18,542 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:14:18,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-21 00:14:18,704 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:14:18,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203592820] [2021-11-21 00:14:18,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 00:14:18,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:18,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:18,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 1 [2021-11-21 00:14:18,710 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:14:18,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-21 00:14:18,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 00:14:18,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:14:18,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:14:18,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:14:19,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:19,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-21 00:14:19,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-21 00:14:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:14:20,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203592820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:14:20,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-21 00:14:20,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5, 7] total 12 [2021-11-21 00:14:20,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845558813] [2021-11-21 00:14:20,012 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-21 00:14:20,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:14:20,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:14:20,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:14:20,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:14:20,013 INFO L87 Difference]: Start difference. First operand 320 states and 397 transitions. Second operand has 13 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 00:14:20,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:20,720 INFO L93 Difference]: Finished difference Result 373 states and 449 transitions. [2021-11-21 00:14:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:14:20,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-11-21 00:14:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:20,723 INFO L225 Difference]: With dead ends: 373 [2021-11-21 00:14:20,723 INFO L226 Difference]: Without dead ends: 373 [2021-11-21 00:14:20,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:14:20,724 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 299 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:20,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 240 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 00:14:20,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-21 00:14:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 330. [2021-11-21 00:14:20,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 292 states have (on average 1.3013698630136987) internal successors, (380), 313 states have internal predecessors, (380), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-21 00:14:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 406 transitions. [2021-11-21 00:14:20,734 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 406 transitions. Word has length 48 [2021-11-21 00:14:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:20,734 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 406 transitions. [2021-11-21 00:14:20,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-21 00:14:20,735 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 406 transitions. [2021-11-21 00:14:20,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 00:14:20,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:20,736 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:20,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-11-21 00:14:20,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-21 00:14:21,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:21,147 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:14:21,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:21,148 INFO L85 PathProgramCache]: Analyzing trace with hash -2005037539, now seen corresponding path program 1 times [2021-11-21 00:14:21,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:14:21,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127076322] [2021-11-21 00:14:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:21,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:14:21,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:14:21,149 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:14:21,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-21 00:14:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:21,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 00:14:21,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:14:21,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:14:21,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:14:21,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127076322] [2021-11-21 00:14:21,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127076322] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:21,488 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:21,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 00:14:21,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398916868] [2021-11-21 00:14:21,489 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:21,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:14:21,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:14:21,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:14:21,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:14:21,490 INFO L87 Difference]: Start difference. First operand 330 states and 406 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-21 00:14:21,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:21,519 INFO L93 Difference]: Finished difference Result 333 states and 405 transitions. [2021-11-21 00:14:21,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:14:21,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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 47 [2021-11-21 00:14:21,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:21,521 INFO L225 Difference]: With dead ends: 333 [2021-11-21 00:14:21,521 INFO L226 Difference]: Without dead ends: 333 [2021-11-21 00:14:21,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:14:21,522 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 42 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:21,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 111 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:14:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-21 00:14:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 328. [2021-11-21 00:14:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 292 states have (on average 1.2808219178082192) internal successors, (374), 311 states have internal predecessors, (374), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-21 00:14:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 400 transitions. [2021-11-21 00:14:21,530 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 400 transitions. Word has length 47 [2021-11-21 00:14:21,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:21,531 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 400 transitions. [2021-11-21 00:14:21,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-21 00:14:21,531 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 400 transitions. [2021-11-21 00:14:21,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 00:14:21,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:21,532 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:21,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-21 00:14:21,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:14:21,743 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:14:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:21,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2005037283, now seen corresponding path program 1 times [2021-11-21 00:14:21,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:14:21,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123047490] [2021-11-21 00:14:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:21,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:14:21,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:14:21,746 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:14:21,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-21 00:14:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:21,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:14:21,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 00:14:21,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 00:14:22,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:14:22,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123047490] [2021-11-21 00:14:22,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123047490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:22,005 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:22,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 00:14:22,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700903937] [2021-11-21 00:14:22,005 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:22,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:14:22,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 00:14:22,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:14:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:14:22,007 INFO L87 Difference]: Start difference. First operand 328 states and 400 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:14:22,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:22,011 INFO L93 Difference]: Finished difference Result 303 states and 357 transitions. [2021-11-21 00:14:22,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:14:22,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 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 47 [2021-11-21 00:14:22,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:22,014 INFO L225 Difference]: With dead ends: 303 [2021-11-21 00:14:22,014 INFO L226 Difference]: Without dead ends: 303 [2021-11-21 00:14:22,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:14:22,015 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 9 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:22,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 95 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:14:22,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-21 00:14:22,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 296. [2021-11-21 00:14:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 266 states have (on average 1.2255639097744362) internal successors, (326), 279 states have internal predecessors, (326), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-21 00:14:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 349 transitions. [2021-11-21 00:14:22,023 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 349 transitions. Word has length 47 [2021-11-21 00:14:22,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:22,023 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 349 transitions. [2021-11-21 00:14:22,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-21 00:14:22,024 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 349 transitions. [2021-11-21 00:14:22,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:14:22,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:22,025 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:22,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-21 00:14:22,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 00:14:22,237 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-21 00:14:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:22,237 INFO L85 PathProgramCache]: Analyzing trace with hash -120223612, now seen corresponding path program 1 times [2021-11-21 00:14:22,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 00:14:22,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573244126] [2021-11-21 00:14:22,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:22,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 00:14:22,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 00:14:22,238 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 00:14:22,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-21 00:14:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:22,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 00:14:22,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:22,775 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:14:22,775 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 28 treesize of output 30 [2021-11-21 00:14:22,781 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:14:22,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-21 00:14:23,025 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:14:23,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-11-21 00:14:23,214 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-21 00:14:23,214 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:14:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:14:23,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:23,679 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:14:23,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-21 00:14:26,193 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:14:26,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-21 00:14:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 23 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:14:53,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 00:14:53,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573244126] [2021-11-21 00:14:53,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573244126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:14:53,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [91061155] [2021-11-21 00:14:53,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:53,026 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 00:14:53,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 00:14:53,028 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 00:14:53,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-21 00:14:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:53,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 00:14:53,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:53,726 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:14:53,726 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 29 treesize of output 31 [2021-11-21 00:14:53,733 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:14:53,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-11-21 00:14:53,948 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:14:53,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-21 00:14:54,123 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-21 00:14:54,123 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:14:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:14:54,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:54,409 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:14:54,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-21 00:14:56,903 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:14:56,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-21 00:15:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 23 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:15:17,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [91061155] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:15:17,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83161225] [2021-11-21 00:15:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:15:17,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:15:17,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:15:17,444 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:15:17,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4de6d77b-b236-4862-a90a-012399c1fc77/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-21 00:15:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:15:17,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 00:15:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:15:17,909 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-21 00:15:17,910 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 27 treesize of output 29 [2021-11-21 00:15:17,915 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:15:17,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-21 00:15:18,127 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:15:18,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-21 00:15:18,273 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-21 00:15:18,274 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-21 00:15:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:15:18,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:15:18,548 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:15:18,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-21 00:15:21,180 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 00:15:21,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27