./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:46:54,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:46:54,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:46:54,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:46:54,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:46:54,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:46:54,492 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:46:54,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:46:54,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:46:54,504 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:46:54,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:46:54,506 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:46:54,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:46:54,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:46:54,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:46:54,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:46:54,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:46:54,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:46:54,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:46:54,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:46:54,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:46:54,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:46:54,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:46:54,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:46:54,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:46:54,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:46:54,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:46:54,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:46:54,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:46:54,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:46:54,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:46:54,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:46:54,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:46:54,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:46:54,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:46:54,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:46:54,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:46:54,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:46:54,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:46:54,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:46:54,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:46:54,563 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 19:46:54,613 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:46:54,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:46:54,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:46:54,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:46:54,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:46:54,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:46:54,615 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:46:54,616 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:46:54,616 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:46:54,616 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:46:54,617 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:46:54,617 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:46:54,617 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:46:54,618 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:46:54,618 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:46:54,618 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:46:54,618 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:46:54,618 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:46:54,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:46:54,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:46:54,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:46:54,620 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:46:54,620 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:46:54,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:46:54,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:46:54,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:46:54,620 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:46:54,621 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:46:54,621 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:46:54,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:46:54,621 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:46:54,622 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:46:54,622 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:46:54,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:46:54,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:46:54,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:46:54,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:46:54,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:46:54,623 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:46:54,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:46:54,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:46:54,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:46:54,625 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_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2021-11-25 19:46:54,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:46:54,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:46:54,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:46:54,945 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:46:54,945 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:46:54,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-11-25 19:46:55,006 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/data/7c6e18d36/b165af84dc6b470b8aa77cc70dc7fd33/FLAG4ef237aef [2021-11-25 19:46:55,564 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:46:55,565 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-11-25 19:46:55,581 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/data/7c6e18d36/b165af84dc6b470b8aa77cc70dc7fd33/FLAG4ef237aef [2021-11-25 19:46:55,837 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/data/7c6e18d36/b165af84dc6b470b8aa77cc70dc7fd33 [2021-11-25 19:46:55,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:46:55,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:46:55,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:46:55,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:46:55,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:46:55,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:46:55" (1/1) ... [2021-11-25 19:46:55,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128f9ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:55, skipping insertion in model container [2021-11-25 19:46:55,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:46:55" (1/1) ... [2021-11-25 19:46:55,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:46:55,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:46:56,320 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:46:56,328 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:46:56,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:46:56,399 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:46:56,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:56 WrapperNode [2021-11-25 19:46:56,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:46:56,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:46:56,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:46:56,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:46:56,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:56" (1/1) ... [2021-11-25 19:46:56,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:56" (1/1) ... [2021-11-25 19:46:56,486 INFO L137 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2021-11-25 19:46:56,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:46:56,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:46:56,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:46:56,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:46:56,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:56" (1/1) ... [2021-11-25 19:46:56,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:56" (1/1) ... [2021-11-25 19:46:56,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:56" (1/1) ... [2021-11-25 19:46:56,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:56" (1/1) ... [2021-11-25 19:46:56,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:56" (1/1) ... [2021-11-25 19:46:56,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:56" (1/1) ... [2021-11-25 19:46:56,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:56" (1/1) ... [2021-11-25 19:46:56,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:46:56,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:46:56,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:46:56,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:46:56,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:56" (1/1) ... [2021-11-25 19:46:56,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:46:56,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:46:56,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:46:56,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:46:56,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:46:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-11-25 19:46:56,612 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-11-25 19:46:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:46:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:46:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:46:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:46:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:46:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:46:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:46:56,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:46:56,699 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:46:56,701 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:46:56,904 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:46:56,930 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:46:56,930 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:46:56,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:46:56 BoogieIcfgContainer [2021-11-25 19:46:56,932 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:46:56,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:46:56,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:46:56,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:46:56,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:46:55" (1/3) ... [2021-11-25 19:46:56,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae429d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:46:56, skipping insertion in model container [2021-11-25 19:46:56,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:46:56" (2/3) ... [2021-11-25 19:46:56,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae429d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:46:56, skipping insertion in model container [2021-11-25 19:46:56,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:46:56" (3/3) ... [2021-11-25 19:46:56,940 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2021-11-25 19:46:56,945 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:46:56,945 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-25 19:46:56,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:46:56,994 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:46:56,995 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-25 19:46:57,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 53 states have internal predecessors, (60), 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) [2021-11-25 19:46:57,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 19:46:57,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:57,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 19:46:57,047 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)] === [2021-11-25 19:46:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:57,054 INFO L85 PathProgramCache]: Analyzing trace with hash 130425256, now seen corresponding path program 1 times [2021-11-25 19:46:57,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:57,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570669275] [2021-11-25 19:46:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:57,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:57,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:57,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570669275] [2021-11-25 19:46:57,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570669275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:46:57,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:46:57,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:46:57,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375047322] [2021-11-25 19:46:57,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:46:57,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:46:57,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:46:57,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:46:57,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:46:57,513 INFO L87 Difference]: Start difference. First operand has 58 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 53 states have internal predecessors, (60), 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) [2021-11-25 19:46:57,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:46:57,716 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2021-11-25 19:46:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:46:57,718 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 [2021-11-25 19:46:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:46:57,740 INFO L225 Difference]: With dead ends: 118 [2021-11-25 19:46:57,740 INFO L226 Difference]: Without dead ends: 115 [2021-11-25 19:46:57,743 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 [2021-11-25 19:46:57,748 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 101 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:46:57,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 112 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:46:57,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-25 19:46:57,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 89. [2021-11-25 19:46:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 79 states have internal predecessors, (102), 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) [2021-11-25 19:46:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2021-11-25 19:46:57,807 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 5 [2021-11-25 19:46:57,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:46:57,807 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2021-11-25 19:46:57,808 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) [2021-11-25 19:46:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2021-11-25 19:46:57,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 19:46:57,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:57,809 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 19:46:57,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:46:57,809 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)] === [2021-11-25 19:46:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash 130425257, now seen corresponding path program 1 times [2021-11-25 19:46:57,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:57,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463628968] [2021-11-25 19:46:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:57,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:57,913 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:57,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463628968] [2021-11-25 19:46:57,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463628968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:46:57,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:46:57,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:46:57,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253300815] [2021-11-25 19:46:57,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:46:57,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:46:57,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:46:57,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:46:57,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:46:57,917 INFO L87 Difference]: Start difference. First operand 89 states and 120 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) [2021-11-25 19:46:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:46:58,059 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2021-11-25 19:46:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:46:58,060 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 [2021-11-25 19:46:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:46:58,069 INFO L225 Difference]: With dead ends: 214 [2021-11-25 19:46:58,069 INFO L226 Difference]: Without dead ends: 214 [2021-11-25 19:46:58,070 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 [2021-11-25 19:46:58,077 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 116 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 197 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 [2021-11-25 19:46:58,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 197 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:46:58,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-25 19:46:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 163. [2021-11-25 19:46:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 128 states have (on average 1.6484375) internal successors, (211), 145 states have internal predecessors, (211), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-25 19:46:58,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 256 transitions. [2021-11-25 19:46:58,121 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 256 transitions. Word has length 5 [2021-11-25 19:46:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:46:58,122 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 256 transitions. [2021-11-25 19:46:58,122 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) [2021-11-25 19:46:58,122 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 256 transitions. [2021-11-25 19:46:58,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:46:58,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:58,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:46:58,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:46:58,123 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)] === [2021-11-25 19:46:58,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:58,130 INFO L85 PathProgramCache]: Analyzing trace with hash -251784379, now seen corresponding path program 1 times [2021-11-25 19:46:58,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:58,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433331212] [2021-11-25 19:46:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:58,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:58,389 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:58,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433331212] [2021-11-25 19:46:58,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433331212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:46:58,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:46:58,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:46:58,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597891984] [2021-11-25 19:46:58,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:46:58,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:46:58,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:46:58,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:46:58,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:46:58,393 INFO L87 Difference]: Start difference. First operand 163 states and 256 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) [2021-11-25 19:46:58,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:46:58,557 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2021-11-25 19:46:58,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:46:58,558 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 [2021-11-25 19:46:58,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:46:58,561 INFO L225 Difference]: With dead ends: 237 [2021-11-25 19:46:58,561 INFO L226 Difference]: Without dead ends: 237 [2021-11-25 19:46:58,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:46:58,563 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 133 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:46:58,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 154 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:46:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-25 19:46:58,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 166. [2021-11-25 19:46:58,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.633587786259542) internal successors, (214), 148 states have internal predecessors, (214), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-25 19:46:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 259 transitions. [2021-11-25 19:46:58,587 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 259 transitions. Word has length 6 [2021-11-25 19:46:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:46:58,588 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 259 transitions. [2021-11-25 19:46:58,588 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) [2021-11-25 19:46:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 259 transitions. [2021-11-25 19:46:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:46:58,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:58,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:46:58,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:46:58,589 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)] === [2021-11-25 19:46:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:58,590 INFO L85 PathProgramCache]: Analyzing trace with hash 784618888, now seen corresponding path program 1 times [2021-11-25 19:46:58,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:58,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895813759] [2021-11-25 19:46:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:58,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:58,741 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:58,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895813759] [2021-11-25 19:46:58,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895813759] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:46:58,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:46:58,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:46:58,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461079947] [2021-11-25 19:46:58,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:46:58,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:46:58,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:46:58,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:46:58,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:46:58,744 INFO L87 Difference]: Start difference. First operand 166 states and 259 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) [2021-11-25 19:46:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:46:58,870 INFO L93 Difference]: Finished difference Result 216 states and 302 transitions. [2021-11-25 19:46:58,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:46:58,871 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 [2021-11-25 19:46:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:46:58,873 INFO L225 Difference]: With dead ends: 216 [2021-11-25 19:46:58,873 INFO L226 Difference]: Without dead ends: 216 [2021-11-25 19:46:58,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:46:58,875 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 118 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 175 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 [2021-11-25 19:46:58,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 175 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:46:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-25 19:46:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2021-11-25 19:46:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.618320610687023) internal successors, (212), 148 states have internal predecessors, (212), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-25 19:46:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 257 transitions. [2021-11-25 19:46:58,894 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 257 transitions. Word has length 7 [2021-11-25 19:46:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:46:58,894 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 257 transitions. [2021-11-25 19:46:58,894 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) [2021-11-25 19:46:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 257 transitions. [2021-11-25 19:46:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:46:58,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:58,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:46:58,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:46:58,896 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)] === [2021-11-25 19:46:58,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1446618201, now seen corresponding path program 1 times [2021-11-25 19:46:58,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:58,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852210363] [2021-11-25 19:46:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:58,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:58,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:58,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852210363] [2021-11-25 19:46:58,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852210363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:46:58,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:46:58,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:46:58,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894391768] [2021-11-25 19:46:58,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:46:58,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:46:58,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:46:58,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:46:58,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:46:58,997 INFO L87 Difference]: Start difference. First operand 166 states and 257 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) [2021-11-25 19:46:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:46:59,102 INFO L93 Difference]: Finished difference Result 244 states and 338 transitions. [2021-11-25 19:46:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:46:59,104 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 [2021-11-25 19:46:59,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:46:59,109 INFO L225 Difference]: With dead ends: 244 [2021-11-25 19:46:59,110 INFO L226 Difference]: Without dead ends: 244 [2021-11-25 19:46:59,110 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 [2021-11-25 19:46:59,112 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 175 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:46:59,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 160 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:46:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-25 19:46:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 201. [2021-11-25 19:46:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 164 states have (on average 1.5914634146341464) internal successors, (261), 182 states have internal predecessors, (261), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-25 19:46:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 306 transitions. [2021-11-25 19:46:59,159 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 306 transitions. Word has length 8 [2021-11-25 19:46:59,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:46:59,160 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 306 transitions. [2021-11-25 19:46:59,160 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) [2021-11-25 19:46:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 306 transitions. [2021-11-25 19:46:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:46:59,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:59,161 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:46:59,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:46:59,162 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)] === [2021-11-25 19:46:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:59,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1895491222, now seen corresponding path program 1 times [2021-11-25 19:46:59,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:59,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548910512] [2021-11-25 19:46:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:59,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:59,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:59,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548910512] [2021-11-25 19:46:59,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548910512] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:46:59,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:46:59,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:46:59,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870594780] [2021-11-25 19:46:59,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:46:59,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:46:59,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:46:59,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:46:59,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:46:59,268 INFO L87 Difference]: Start difference. First operand 201 states and 306 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) [2021-11-25 19:46:59,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:46:59,364 INFO L93 Difference]: Finished difference Result 239 states and 321 transitions. [2021-11-25 19:46:59,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:46:59,365 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 [2021-11-25 19:46:59,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:46:59,368 INFO L225 Difference]: With dead ends: 239 [2021-11-25 19:46:59,368 INFO L226 Difference]: Without dead ends: 239 [2021-11-25 19:46:59,369 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 [2021-11-25 19:46:59,371 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 156 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 182 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 [2021-11-25 19:46:59,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 182 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:46:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-25 19:46:59,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 211. [2021-11-25 19:46:59,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 173 states have (on average 1.583815028901734) internal successors, (274), 192 states have internal predecessors, (274), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-25 19:46:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 319 transitions. [2021-11-25 19:46:59,393 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 319 transitions. Word has length 9 [2021-11-25 19:46:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:46:59,394 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 319 transitions. [2021-11-25 19:46:59,394 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) [2021-11-25 19:46:59,395 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 319 transitions. [2021-11-25 19:46:59,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:46:59,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:59,395 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:46:59,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:46:59,396 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)] === [2021-11-25 19:46:59,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:59,397 INFO L85 PathProgramCache]: Analyzing trace with hash -354750800, now seen corresponding path program 1 times [2021-11-25 19:46:59,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:59,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155732623] [2021-11-25 19:46:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:59,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:59,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:59,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155732623] [2021-11-25 19:46:59,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155732623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:46:59,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165419609] [2021-11-25 19:46:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:59,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:46:59,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:46:59,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:46:59,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:46:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:59,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:46:59,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:46:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:59,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:46:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:46:59,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165419609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:46:59,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [926848457] [2021-11-25 19:46:59,979 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 19:46:59,980 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:46:59,984 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:46:59,989 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:46:59,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:00,122 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2021-11-25 19:47:03,514 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:06,932 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2449#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (<= 0 ~global~0.base) (<= |parse_input_~input#1.base| 3) (= |parse_input_#in~input#1.base| 3) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (<= ~global~0.base 0) (= |old(~global~0.base)| 0) (= |#NULL.offset| 0) (< (select |#length| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4)) (< |parse_input_~i~0#1| 2) (= |parse_input_#in~input#1.offset| 0) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:47:06,933 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:06,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:47:06,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2021-11-25 19:47:06,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014610917] [2021-11-25 19:47:06,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:06,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:47:06,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:06,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:47:06,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:47:06,936 INFO L87 Difference]: Start difference. First operand 211 states and 319 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) [2021-11-25 19:47:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:07,230 INFO L93 Difference]: Finished difference Result 293 states and 406 transitions. [2021-11-25 19:47:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:47:07,231 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 [2021-11-25 19:47:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:07,236 INFO L225 Difference]: With dead ends: 293 [2021-11-25 19:47:07,237 INFO L226 Difference]: Without dead ends: 293 [2021-11-25 19:47:07,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:47:07,239 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 402 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:07,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 381 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:47:07,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-25 19:47:07,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 223. [2021-11-25 19:47:07,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 182 states have (on average 1.5054945054945055) internal successors, (274), 204 states have internal predecessors, (274), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (44), 11 states have call predecessors, (44), 11 states have call successors, (44) [2021-11-25 19:47:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 329 transitions. [2021-11-25 19:47:07,260 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 329 transitions. Word has length 13 [2021-11-25 19:47:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:07,261 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 329 transitions. [2021-11-25 19:47:07,261 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) [2021-11-25 19:47:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 329 transitions. [2021-11-25 19:47:07,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:47:07,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:07,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:47:07,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:47:07,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:47:07,476 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)] === [2021-11-25 19:47:07,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:07,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1887627038, now seen corresponding path program 1 times [2021-11-25 19:47:07,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:07,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644074406] [2021-11-25 19:47:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:07,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:07,596 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:07,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644074406] [2021-11-25 19:47:07,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644074406] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:07,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748486780] [2021-11-25 19:47:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:07,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:07,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:07,598 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:07,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:47:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:07,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:47:07,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:07,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 19:47:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:07,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:07,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748486780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:47:07,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [279334791] [2021-11-25 19:47:07,869 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 19:47:07,869 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:07,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:07,870 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:07,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:07,913 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2021-11-25 19:47:09,974 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:14,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [279334791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:47:14,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:47:14,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 15 [2021-11-25 19:47:14,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832025838] [2021-11-25 19:47:14,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:47:14,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:47:14,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:14,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:47:14,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:47:14,129 INFO L87 Difference]: Start difference. First operand 223 states and 329 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) [2021-11-25 19:47:15,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:15,089 INFO L93 Difference]: Finished difference Result 211 states and 290 transitions. [2021-11-25 19:47:15,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:47:15,091 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 [2021-11-25 19:47:15,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:15,093 INFO L225 Difference]: With dead ends: 211 [2021-11-25 19:47:15,093 INFO L226 Difference]: Without dead ends: 211 [2021-11-25 19:47:15,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:47:15,095 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 45 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:15,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 133 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:47:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-25 19:47:15,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2021-11-25 19:47:15,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 169 states have (on average 1.485207100591716) internal successors, (251), 192 states have internal predecessors, (251), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-25 19:47:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 284 transitions. [2021-11-25 19:47:15,106 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 284 transitions. Word has length 14 [2021-11-25 19:47:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:15,107 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 284 transitions. [2021-11-25 19:47:15,107 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) [2021-11-25 19:47:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 284 transitions. [2021-11-25 19:47:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:47:15,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:15,109 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] [2021-11-25 19:47:15,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 19:47:15,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:15,324 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)] === [2021-11-25 19:47:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash 351522922, now seen corresponding path program 1 times [2021-11-25 19:47:15,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:15,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322078678] [2021-11-25 19:47:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:15,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:15,370 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:15,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322078678] [2021-11-25 19:47:15,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322078678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:47:15,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:47:15,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:47:15,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184910536] [2021-11-25 19:47:15,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:47:15,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:47:15,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:15,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:47:15,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:47:15,373 INFO L87 Difference]: Start difference. First operand 205 states and 284 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:47:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:15,399 INFO L93 Difference]: Finished difference Result 211 states and 288 transitions. [2021-11-25 19:47:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:47:15,407 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), 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 23 [2021-11-25 19:47:15,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:15,410 INFO L225 Difference]: With dead ends: 211 [2021-11-25 19:47:15,411 INFO L226 Difference]: Without dead ends: 211 [2021-11-25 19:47:15,411 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 [2021-11-25 19:47:15,414 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:15,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 112 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:47:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-25 19:47:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2021-11-25 19:47:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 169 states have (on average 1.467455621301775) internal successors, (248), 192 states have internal predecessors, (248), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2021-11-25 19:47:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 281 transitions. [2021-11-25 19:47:15,426 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 281 transitions. Word has length 23 [2021-11-25 19:47:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:15,427 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 281 transitions. [2021-11-25 19:47:15,427 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:47:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 281 transitions. [2021-11-25 19:47:15,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 19:47:15,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:15,429 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] [2021-11-25 19:47:15,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:47:15,429 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:47:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:15,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1643273810, now seen corresponding path program 1 times [2021-11-25 19:47:15,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:15,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218040248] [2021-11-25 19:47:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:15,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:15,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:15,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218040248] [2021-11-25 19:47:15,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218040248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:15,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014099017] [2021-11-25 19:47:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:15,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:15,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:15,673 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:15,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:47:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:15,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:47:15,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:16,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:16,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:47:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:16,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:16,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014099017] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:16,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1118247358] [2021-11-25 19:47:16,384 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-25 19:47:16,384 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:16,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:16,385 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:16,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:16,540 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:47:16,541 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 [2021-11-25 19:47:16,564 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-25 19:47:16,565 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 [2021-11-25 19:47:17,053 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-25 19:47:17,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:17,314 INFO L354 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2021-11-25 19:47:17,315 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 [2021-11-25 19:47:17,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:17,602 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-25 19:47:17,602 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 [2021-11-25 19:47:17,792 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:22,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4014#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |~#commands~0.offset|) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (< (select |#length| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4)) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:47:22,292 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:22,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:47:22,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2021-11-25 19:47:22,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145525183] [2021-11-25 19:47:22,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:22,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:47:22,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:22,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:47:22,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 19:47:22,294 INFO L87 Difference]: Start difference. First operand 205 states and 281 transitions. Second operand has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 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) [2021-11-25 19:47:23,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:23,039 INFO L93 Difference]: Finished difference Result 392 states and 514 transitions. [2021-11-25 19:47:23,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:47:23,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 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 25 [2021-11-25 19:47:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:23,042 INFO L225 Difference]: With dead ends: 392 [2021-11-25 19:47:23,043 INFO L226 Difference]: Without dead ends: 392 [2021-11-25 19:47:23,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=329, Invalid=1741, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 19:47:23,045 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 581 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:23,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 336 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 272 Invalid, 0 Unknown, 93 Unchecked, 0.3s Time] [2021-11-25 19:47:23,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-25 19:47:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 286. [2021-11-25 19:47:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 245 states have (on average 1.5142857142857142) internal successors, (371), 269 states have internal predecessors, (371), 9 states have call successors, (9), 7 states have call predecessors, (9), 14 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-11-25 19:47:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 410 transitions. [2021-11-25 19:47:23,065 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 410 transitions. Word has length 25 [2021-11-25 19:47:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:23,066 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 410 transitions. [2021-11-25 19:47:23,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 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) [2021-11-25 19:47:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 410 transitions. [2021-11-25 19:47:23,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 19:47:23,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:23,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:47:23,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:47:23,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:47:23,282 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:47:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1123038032, now seen corresponding path program 1 times [2021-11-25 19:47:23,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:23,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229904522] [2021-11-25 19:47:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:23,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:23,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:23,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229904522] [2021-11-25 19:47:23,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229904522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:23,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833134519] [2021-11-25 19:47:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:23,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:23,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:23,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:23,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:47:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:23,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:47:23,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:23,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:47:23,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833134519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:47:23,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:47:23,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2021-11-25 19:47:23,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245158311] [2021-11-25 19:47:23,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:47:23,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:47:23,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:23,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:47:23,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:47:23,612 INFO L87 Difference]: Start difference. First operand 286 states and 410 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:47:23,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:23,695 INFO L93 Difference]: Finished difference Result 376 states and 524 transitions. [2021-11-25 19:47:23,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:47:23,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 26 [2021-11-25 19:47:23,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:23,699 INFO L225 Difference]: With dead ends: 376 [2021-11-25 19:47:23,700 INFO L226 Difference]: Without dead ends: 376 [2021-11-25 19:47:23,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:47:23,701 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 128 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:23,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 141 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:47:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-25 19:47:23,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 307. [2021-11-25 19:47:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 266 states have (on average 1.5263157894736843) internal successors, (406), 290 states have internal predecessors, (406), 9 states have call successors, (9), 7 states have call predecessors, (9), 14 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-11-25 19:47:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 445 transitions. [2021-11-25 19:47:23,719 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 445 transitions. Word has length 26 [2021-11-25 19:47:23,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:23,721 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 445 transitions. [2021-11-25 19:47:23,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:47:23,721 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 445 transitions. [2021-11-25 19:47:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 19:47:23,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:23,728 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:47:23,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:47:23,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 19:47:23,956 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:47:23,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:23,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1361832013, now seen corresponding path program 1 times [2021-11-25 19:47:23,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:23,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974802648] [2021-11-25 19:47:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:23,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:24,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:24,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974802648] [2021-11-25 19:47:24,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974802648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:24,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156933650] [2021-11-25 19:47:24,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:24,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:24,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:24,228 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:24,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:47:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:24,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 19:47:24,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:24,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:24,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:47:24,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:47:24,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:47:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:24,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:25,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156933650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:25,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [41394898] [2021-11-25 19:47:25,054 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-25 19:47:25,054 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:25,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:25,055 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:25,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:25,203 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:47:25,203 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 [2021-11-25 19:47:25,226 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-25 19:47:25,226 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 [2021-11-25 19:47:25,625 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-25 19:47:25,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:25,845 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-25 19:47:25,845 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 [2021-11-25 19:47:25,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:25,868 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-25 19:47:25,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-11-25 19:47:25,998 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:29,763 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5622#(and (or (< |parse_input_#t~mem3#1.offset| 0) (<= (select |#length| |parse_input_#t~mem3#1.base|) |parse_input_#t~mem3#1.offset|)) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (= |parse_input_#t~mem3#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_#t~mem3#1.base|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:47:29,763 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:29,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:47:29,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2021-11-25 19:47:29,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380922106] [2021-11-25 19:47:29,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:29,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 19:47:29,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:29,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 19:47:29,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 19:47:29,765 INFO L87 Difference]: Start difference. First operand 307 states and 445 transitions. Second operand has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2021-11-25 19:47:30,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:30,452 INFO L93 Difference]: Finished difference Result 351 states and 466 transitions. [2021-11-25 19:47:30,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:47:30,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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 [2021-11-25 19:47:30,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:30,456 INFO L225 Difference]: With dead ends: 351 [2021-11-25 19:47:30,456 INFO L226 Difference]: Without dead ends: 351 [2021-11-25 19:47:30,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 19:47:30,458 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 301 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:30,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 391 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 309 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2021-11-25 19:47:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-25 19:47:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 307. [2021-11-25 19:47:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 266 states have (on average 1.518796992481203) internal successors, (404), 290 states have internal predecessors, (404), 9 states have call successors, (9), 7 states have call predecessors, (9), 14 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-11-25 19:47:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 443 transitions. [2021-11-25 19:47:30,472 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 443 transitions. Word has length 27 [2021-11-25 19:47:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:30,473 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 443 transitions. [2021-11-25 19:47:30,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 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) [2021-11-25 19:47:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 443 transitions. [2021-11-25 19:47:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:47:30,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:30,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:47:30,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:47:30,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:30,688 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:47:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:30,688 INFO L85 PathProgramCache]: Analyzing trace with hash -732880510, now seen corresponding path program 1 times [2021-11-25 19:47:30,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:30,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908078740] [2021-11-25 19:47:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:30,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:30,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908078740] [2021-11-25 19:47:30,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908078740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934535757] [2021-11-25 19:47:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:30,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:30,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:30,820 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:30,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:47:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:30,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:47:30,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:31,044 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:47:31,044 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 [2021-11-25 19:47:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:31,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:31,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934535757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227804024] [2021-11-25 19:47:31,186 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-25 19:47:31,186 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:31,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:31,187 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:31,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:31,358 INFO L354 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2021-11-25 19:47:31,359 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 [2021-11-25 19:47:31,941 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:47:31,941 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 [2021-11-25 19:47:32,394 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2021-11-25 19:47:33,479 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:48,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6437#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (<= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (= |parse_input_#t~mem3#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_#t~mem3#1.base|) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2021-11-25 19:47:48,614 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:48,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:47:48,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-11-25 19:47:48,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017648270] [2021-11-25 19:47:48,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:48,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:47:48,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:47:48,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=695, Unknown=3, NotChecked=0, Total=930 [2021-11-25 19:47:48,616 INFO L87 Difference]: Start difference. First operand 307 states and 443 transitions. Second operand has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:47:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:49,031 INFO L93 Difference]: Finished difference Result 425 states and 569 transitions. [2021-11-25 19:47:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:47:49,032 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-11-25 19:47:49,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:49,035 INFO L225 Difference]: With dead ends: 425 [2021-11-25 19:47:49,035 INFO L226 Difference]: Without dead ends: 425 [2021-11-25 19:47:49,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=340, Invalid=1139, Unknown=3, NotChecked=0, Total=1482 [2021-11-25 19:47:49,036 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 383 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:49,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 373 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 192 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2021-11-25 19:47:49,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-25 19:47:49,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 372. [2021-11-25 19:47:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 328 states have (on average 1.4817073170731707) internal successors, (486), 353 states have internal predecessors, (486), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-11-25 19:47:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 525 transitions. [2021-11-25 19:47:49,052 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 525 transitions. Word has length 28 [2021-11-25 19:47:49,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:49,052 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 525 transitions. [2021-11-25 19:47:49,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:47:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 525 transitions. [2021-11-25 19:47:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:47:49,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:49,054 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:47:49,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-25 19:47:49,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 19:47:49,280 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:47:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:49,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1244459281, now seen corresponding path program 1 times [2021-11-25 19:47:49,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:49,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624572089] [2021-11-25 19:47:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:49,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:49,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:49,401 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:49,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624572089] [2021-11-25 19:47:49,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624572089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:49,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408714347] [2021-11-25 19:47:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:49,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:49,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:49,403 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:49,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:47:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:49,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:47:49,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:49,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:49,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:47:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:49,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:49,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408714347] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:49,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880996585] [2021-11-25 19:47:49,889 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-25 19:47:49,889 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:49,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:49,890 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:49,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:50,027 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:47:50,027 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 [2021-11-25 19:47:50,045 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-25 19:47:50,045 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 [2021-11-25 19:47:50,422 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-25 19:47:50,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:50,669 INFO L354 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2021-11-25 19:47:50,669 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 [2021-11-25 19:47:50,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:51,042 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-25 19:47:51,043 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 [2021-11-25 19:47:51,195 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:55,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7399#(and (<= (select |#length| |parse_input_~input#1.base|) |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (= |parse_input_#t~mem3#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_#t~mem3#1.base|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:47:55,509 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:55,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:47:55,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2021-11-25 19:47:55,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220506601] [2021-11-25 19:47:55,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:55,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 19:47:55,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:55,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 19:47:55,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 19:47:55,512 INFO L87 Difference]: Start difference. First operand 372 states and 525 transitions. Second operand has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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) [2021-11-25 19:47:56,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:56,131 INFO L93 Difference]: Finished difference Result 448 states and 577 transitions. [2021-11-25 19:47:56,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:47:56,132 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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 29 [2021-11-25 19:47:56,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:56,134 INFO L225 Difference]: With dead ends: 448 [2021-11-25 19:47:56,134 INFO L226 Difference]: Without dead ends: 448 [2021-11-25 19:47:56,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=334, Invalid=1922, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 19:47:56,135 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 459 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:56,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 347 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 307 Invalid, 0 Unknown, 109 Unchecked, 0.3s Time] [2021-11-25 19:47:56,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-25 19:47:56,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 392. [2021-11-25 19:47:56,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 346 states have (on average 1.4797687861271676) internal successors, (512), 373 states have internal predecessors, (512), 9 states have call successors, (9), 9 states have call predecessors, (9), 19 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-11-25 19:47:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 551 transitions. [2021-11-25 19:47:56,152 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 551 transitions. Word has length 29 [2021-11-25 19:47:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:56,153 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 551 transitions. [2021-11-25 19:47:56,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 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) [2021-11-25 19:47:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 551 transitions. [2021-11-25 19:47:56,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 19:47:56,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:56,154 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] [2021-11-25 19:47:56,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 19:47:56,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:47:56,380 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:47:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1727568309, now seen corresponding path program 1 times [2021-11-25 19:47:56,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:56,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416304321] [2021-11-25 19:47:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:56,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:56,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:56,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416304321] [2021-11-25 19:47:56,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416304321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:56,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613104701] [2021-11-25 19:47:56,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:56,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:56,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:56,580 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:56,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:47:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:47:56,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:47:56,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:57,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:57,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:47:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:47:57,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:57,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613104701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:47:57,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266219673] [2021-11-25 19:47:57,341 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-25 19:47:57,341 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:57,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:57,341 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:57,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:57,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:57,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:57,594 INFO L354 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2021-11-25 19:47:57,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2021-11-25 19:47:57,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:57,674 INFO L354 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2021-11-25 19:47:57,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2021-11-25 19:47:58,228 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-25 19:47:58,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:58,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:58,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:58,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:58,537 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:47:58,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-11-25 19:47:58,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:58,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:58,582 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 19:47:58,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 19:47:58,843 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:02,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8436#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (< (select |#length| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4)) (<= |parse_input_~input#1.base| 4) (< |parse_input_~i~0#1| 2) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:02,010 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:02,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:48:02,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2021-11-25 19:48:02,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575861085] [2021-11-25 19:48:02,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:02,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 19:48:02,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:02,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 19:48:02,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:48:02,012 INFO L87 Difference]: Start difference. First operand 392 states and 551 transitions. Second operand has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 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) [2021-11-25 19:48:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:02,796 INFO L93 Difference]: Finished difference Result 448 states and 580 transitions. [2021-11-25 19:48:02,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 19:48:02,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 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 33 [2021-11-25 19:48:02,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:02,800 INFO L225 Difference]: With dead ends: 448 [2021-11-25 19:48:02,800 INFO L226 Difference]: Without dead ends: 448 [2021-11-25 19:48:02,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=333, Invalid=2217, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 19:48:02,802 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 428 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:02,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 470 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 454 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2021-11-25 19:48:02,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-11-25 19:48:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 279. [2021-11-25 19:48:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 244 states have (on average 1.4508196721311475) internal successors, (354), 266 states have internal predecessors, (354), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-25 19:48:02,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 375 transitions. [2021-11-25 19:48:02,824 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 375 transitions. Word has length 33 [2021-11-25 19:48:02,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:02,825 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 375 transitions. [2021-11-25 19:48:02,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 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) [2021-11-25 19:48:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 375 transitions. [2021-11-25 19:48:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:48:02,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:02,826 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] [2021-11-25 19:48:02,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-25 19:48:03,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:48:03,048 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:48:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:03,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2015009977, now seen corresponding path program 1 times [2021-11-25 19:48:03,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:03,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334257647] [2021-11-25 19:48:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:03,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:03,293 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:03,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334257647] [2021-11-25 19:48:03,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334257647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:03,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384761814] [2021-11-25 19:48:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:03,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:03,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:03,295 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:03,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:48:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:03,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:48:03,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:03,526 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 19:48:03,527 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 14 [2021-11-25 19:48:03,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 19:48:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:03,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:03,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:03,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384761814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:03,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [345060511] [2021-11-25 19:48:03,927 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-25 19:48:03,927 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:03,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:03,928 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:03,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:04,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:04,193 INFO L354 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2021-11-25 19:48:04,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2021-11-25 19:48:04,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:04,275 INFO L354 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2021-11-25 19:48:04,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2021-11-25 19:48:04,834 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-25 19:48:05,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:05,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:05,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:05,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:05,136 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:48:05,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-11-25 19:48:05,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:05,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:05,175 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 19:48:05,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 19:48:05,422 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:08,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9425#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:08,177 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:08,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:48:08,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 17 [2021-11-25 19:48:08,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150794692] [2021-11-25 19:48:08,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:08,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 19:48:08,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 19:48:08,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 19:48:08,179 INFO L87 Difference]: Start difference. First operand 279 states and 375 transitions. Second operand has 19 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:48:08,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:08,821 INFO L93 Difference]: Finished difference Result 350 states and 443 transitions. [2021-11-25 19:48:08,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 19:48:08,822 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-11-25 19:48:08,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:08,824 INFO L225 Difference]: With dead ends: 350 [2021-11-25 19:48:08,824 INFO L226 Difference]: Without dead ends: 350 [2021-11-25 19:48:08,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=325, Invalid=2027, Unknown=0, NotChecked=0, Total=2352 [2021-11-25 19:48:08,826 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 548 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:08,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 431 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 349 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2021-11-25 19:48:08,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-11-25 19:48:08,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 279. [2021-11-25 19:48:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 244 states have (on average 1.4426229508196722) internal successors, (352), 266 states have internal predecessors, (352), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-25 19:48:08,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 373 transitions. [2021-11-25 19:48:08,838 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 373 transitions. Word has length 34 [2021-11-25 19:48:08,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:08,838 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 373 transitions. [2021-11-25 19:48:08,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:48:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 373 transitions. [2021-11-25 19:48:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 19:48:08,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:08,839 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, 1, 1, 1, 1] [2021-11-25 19:48:08,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:09,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:09,056 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:48:09,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:09,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1959200108, now seen corresponding path program 1 times [2021-11-25 19:48:09,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:09,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442559886] [2021-11-25 19:48:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:09,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:09,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:09,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442559886] [2021-11-25 19:48:09,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442559886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:09,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568049683] [2021-11-25 19:48:09,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:09,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:09,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:09,325 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:09,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:48:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:09,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 19:48:09,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:09,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:09,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:48:09,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 19:48:09,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 19:48:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:09,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:10,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568049683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:10,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1960882441] [2021-11-25 19:48:10,192 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-25 19:48:10,192 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:10,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:10,192 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:10,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:10,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:10,422 INFO L354 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2021-11-25 19:48:10,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2021-11-25 19:48:10,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:10,490 INFO L354 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2021-11-25 19:48:10,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2021-11-25 19:48:11,006 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-25 19:48:11,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:11,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:11,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:11,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:11,274 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:48:11,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-11-25 19:48:11,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:11,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:11,331 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 19:48:11,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 19:48:11,515 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:14,320 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10268#(and (<= |parse_input_~input#1.offset| 0) (or (< |parse_input_#t~mem3#1.offset| 0) (<= (select |#length| |parse_input_#t~mem3#1.base|) |parse_input_#t~mem3#1.offset|)) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:14,320 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:14,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:48:14,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-11-25 19:48:14,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098517640] [2021-11-25 19:48:14,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:14,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 19:48:14,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 19:48:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 19:48:14,323 INFO L87 Difference]: Start difference. First operand 279 states and 373 transitions. Second operand has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 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) [2021-11-25 19:48:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:15,119 INFO L93 Difference]: Finished difference Result 353 states and 432 transitions. [2021-11-25 19:48:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 19:48:15,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 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 [2021-11-25 19:48:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:15,122 INFO L225 Difference]: With dead ends: 353 [2021-11-25 19:48:15,122 INFO L226 Difference]: Without dead ends: 353 [2021-11-25 19:48:15,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=371, Invalid=2599, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 19:48:15,125 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 442 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:15,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 481 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 503 Invalid, 0 Unknown, 92 Unchecked, 0.4s Time] [2021-11-25 19:48:15,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-25 19:48:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 281. [2021-11-25 19:48:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 246 states have (on average 1.4268292682926829) internal successors, (351), 268 states have internal predecessors, (351), 6 states have call successors, (6), 6 states have call predecessors, (6), 11 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-25 19:48:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 372 transitions. [2021-11-25 19:48:15,136 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 372 transitions. Word has length 35 [2021-11-25 19:48:15,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:15,136 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 372 transitions. [2021-11-25 19:48:15,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 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) [2021-11-25 19:48:15,137 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 372 transitions. [2021-11-25 19:48:15,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 19:48:15,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:15,138 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:15,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:15,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 19:48:15,363 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:48:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash -724690043, now seen corresponding path program 1 times [2021-11-25 19:48:15,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:15,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947444185] [2021-11-25 19:48:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:15,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:15,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:15,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947444185] [2021-11-25 19:48:15,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947444185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:15,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385401742] [2021-11-25 19:48:15,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:15,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:15,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:15,429 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:15,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:48:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:15,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 19:48:15,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:15,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:15,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385401742] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:15,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1676953749] [2021-11-25 19:48:15,678 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-25 19:48:15,678 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:15,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:15,679 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:15,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:15,811 INFO L354 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2021-11-25 19:48:15,811 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 [2021-11-25 19:48:16,319 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:48:16,319 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 [2021-11-25 19:48:16,571 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2021-11-25 19:48:17,519 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:27,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1676953749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:27,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:48:27,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 3, 3] total 21 [2021-11-25 19:48:27,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955841346] [2021-11-25 19:48:27,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:27,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 19:48:27,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:27,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 19:48:27,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:48:27,934 INFO L87 Difference]: Start difference. First operand 281 states and 372 transitions. Second operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-11-25 19:48:29,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:29,600 INFO L93 Difference]: Finished difference Result 504 states and 667 transitions. [2021-11-25 19:48:29,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 19:48:29,601 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 37 [2021-11-25 19:48:29,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:29,604 INFO L225 Difference]: With dead ends: 504 [2021-11-25 19:48:29,604 INFO L226 Difference]: Without dead ends: 504 [2021-11-25 19:48:29,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:48:29,605 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 145 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:29,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 184 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 19:48:29,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-25 19:48:29,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 459. [2021-11-25 19:48:29,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 412 states have (on average 1.4223300970873787) internal successors, (586), 438 states have internal predecessors, (586), 10 states have call successors, (10), 10 states have call predecessors, (10), 19 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2021-11-25 19:48:29,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 628 transitions. [2021-11-25 19:48:29,632 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 628 transitions. Word has length 37 [2021-11-25 19:48:29,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:29,632 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 628 transitions. [2021-11-25 19:48:29,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2021-11-25 19:48:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 628 transitions. [2021-11-25 19:48:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-25 19:48:29,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:29,640 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:29,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:29,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 19:48:29,860 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:48:29,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:29,861 INFO L85 PathProgramCache]: Analyzing trace with hash -990554755, now seen corresponding path program 1 times [2021-11-25 19:48:29,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:29,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586358757] [2021-11-25 19:48:29,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:29,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:29,922 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:29,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586358757] [2021-11-25 19:48:29,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586358757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:29,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379235233] [2021-11-25 19:48:29,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:29,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:29,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:29,924 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:29,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:48:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:30,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:48:30,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:30,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:30,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379235233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2004247848] [2021-11-25 19:48:30,215 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 19:48:30,215 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:30,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:30,215 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:30,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:30,355 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:48:30,356 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 [2021-11-25 19:48:30,380 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-25 19:48:30,381 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 [2021-11-25 19:48:30,805 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-25 19:48:30,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,977 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-25 19:48:30,978 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 [2021-11-25 19:48:30,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:30,996 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-25 19:48:30,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-11-25 19:48:31,129 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:34,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12376#(and (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (<= (select (select |#memory_int| |~#commands~0.base|) (+ |~#commands~0.offset| 8 (* |parse_input_~i~0#1| 9))) ~state~0) (= 6 |~#commands~0.base|) (not (= |parse_input_c1_~x~0#1.base| 0)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9) 4)) |parse_input_#t~mem6#1.offset|) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9) 4))) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))))) (= ~global~0.offset 0) (<= 0 |~#commands~0.offset|) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= |#StackHeapBarrier| ~global~0.base) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (not (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_c1_~x~0#1.base|)) (<= |parse_input_#in~input#1.base| 4) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= |#NULL.offset| 0) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) 1) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:34,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:34,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:48:34,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2021-11-25 19:48:34,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685612269] [2021-11-25 19:48:34,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:34,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:34,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:34,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:34,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:48:34,748 INFO L87 Difference]: Start difference. First operand 459 states and 628 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:48:34,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:34,806 INFO L93 Difference]: Finished difference Result 475 states and 639 transitions. [2021-11-25 19:48:34,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:48:34,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 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 38 [2021-11-25 19:48:34,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:34,811 INFO L225 Difference]: With dead ends: 475 [2021-11-25 19:48:34,811 INFO L226 Difference]: Without dead ends: 475 [2021-11-25 19:48:34,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-11-25 19:48:34,813 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 47 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:34,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 76 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-11-25 19:48:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 469. [2021-11-25 19:48:34,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 420 states have (on average 1.3952380952380952) internal successors, (586), 448 states have internal predecessors, (586), 10 states have call successors, (10), 10 states have call predecessors, (10), 23 states have return successors, (37), 10 states have call predecessors, (37), 10 states have call successors, (37) [2021-11-25 19:48:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 633 transitions. [2021-11-25 19:48:34,828 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 633 transitions. Word has length 38 [2021-11-25 19:48:34,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:34,829 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 633 transitions. [2021-11-25 19:48:34,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:48:34,829 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 633 transitions. [2021-11-25 19:48:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 19:48:34,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:34,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:34,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:35,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:35,048 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:48:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:35,049 INFO L85 PathProgramCache]: Analyzing trace with hash -642426233, now seen corresponding path program 1 times [2021-11-25 19:48:35,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:35,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733546481] [2021-11-25 19:48:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:35,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:35,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:35,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733546481] [2021-11-25 19:48:35,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733546481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:35,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65000476] [2021-11-25 19:48:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:35,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:35,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:35,112 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:35,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:48:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:35,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:48:35,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:35,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:48:35,274 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:48:35,274 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 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 19:48:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:35,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:35,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65000476] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:35,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [871344068] [2021-11-25 19:48:35,507 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-25 19:48:35,507 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:35,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:35,509 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:35,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:35,665 INFO L354 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2021-11-25 19:48:35,666 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 [2021-11-25 19:48:36,085 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:48:36,085 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 [2021-11-25 19:48:36,433 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2021-11-25 19:48:37,620 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:49,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13575#(and (= ~global~0.base |old(~global~0.base)|) (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |old(#valid)| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) 1) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (= |#length| (store |old(#length)| |parse_input_c1_~x~0#1.base| 1)) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |old(#length)| |~#commands~0.base|)) (not (= (select |#valid| ~global~0.base) 1)) (<= 6 |~#commands~0.base|) (= (store |old(#valid)| |parse_input_c1_~x~0#1.base| 1) |#valid|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ |~#commands~0.offset| 8 (* |parse_input_~i~0#1| 9))) ~state~0) (not (= |parse_input_c1_~x~0#1.base| 0)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9) 4)) |parse_input_#t~mem6#1.offset|) (= ~state~0 |old(~state~0)|) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (<= 4 |parse_input_#in~input#1.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9) 4))) (= (select |old(#valid)| |parse_input_~input#1.base|) 1) (<= |#NULL.offset| 0) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (< ~global~0.base |#StackHeapBarrier|) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) (select |old(#length)| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))))) (= ~global~0.offset 0) (<= 0 (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) (= (select |old(#valid)| |~#commands~0.base|) 1) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (= (select |old(#valid)| |parse_input_c1_~x~0#1.base|) 0) (<= |parse_input_#in~input#1.base| 4) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 0 |#NULL.offset|) (< |parse_input_~input#1.offset| (select |old(#length)| |parse_input_~input#1.base|)) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (<= |~#commands~0.offset| 0))' at error location [2021-11-25 19:48:49,212 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:49,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:48:49,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 5 [2021-11-25 19:48:49,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969557942] [2021-11-25 19:48:49,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:49,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:48:49,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:49,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:48:49,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-11-25 19:48:49,213 INFO L87 Difference]: Start difference. First operand 469 states and 633 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 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) [2021-11-25 19:48:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:49,306 INFO L93 Difference]: Finished difference Result 585 states and 778 transitions. [2021-11-25 19:48:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:48:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 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 39 [2021-11-25 19:48:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:49,314 INFO L225 Difference]: With dead ends: 585 [2021-11-25 19:48:49,314 INFO L226 Difference]: Without dead ends: 585 [2021-11-25 19:48:49,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-11-25 19:48:49,315 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 44 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:49,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 226 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2021-11-25 19:48:49,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-11-25 19:48:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 549. [2021-11-25 19:48:49,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 495 states have (on average 1.3797979797979798) internal successors, (683), 524 states have internal predecessors, (683), 12 states have call successors, (12), 12 states have call predecessors, (12), 26 states have return successors, (47), 12 states have call predecessors, (47), 12 states have call successors, (47) [2021-11-25 19:48:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 742 transitions. [2021-11-25 19:48:49,337 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 742 transitions. Word has length 39 [2021-11-25 19:48:49,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:49,337 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 742 transitions. [2021-11-25 19:48:49,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 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) [2021-11-25 19:48:49,338 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 742 transitions. [2021-11-25 19:48:49,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 19:48:49,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:49,339 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, 1, 1, 1] [2021-11-25 19:48:49,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-25 19:48:49,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:49,564 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:48:49,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:49,565 INFO L85 PathProgramCache]: Analyzing trace with hash 693025532, now seen corresponding path program 1 times [2021-11-25 19:48:49,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:49,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297510836] [2021-11-25 19:48:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:49,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:48:49,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:49,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297510836] [2021-11-25 19:48:49,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297510836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:49,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170419771] [2021-11-25 19:48:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:49,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:49,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:49,635 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:49,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 19:48:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:49,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:48:49,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:48:49,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:48:49,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170419771] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:49,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:48:49,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 2] total 6 [2021-11-25 19:48:49,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037272827] [2021-11-25 19:48:49,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:49,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:48:49,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:49,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:48:49,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:48:49,928 INFO L87 Difference]: Start difference. First operand 549 states and 742 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-11-25 19:48:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:49,997 INFO L93 Difference]: Finished difference Result 622 states and 828 transitions. [2021-11-25 19:48:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:48:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 40 [2021-11-25 19:48:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:50,002 INFO L225 Difference]: With dead ends: 622 [2021-11-25 19:48:50,003 INFO L226 Difference]: Without dead ends: 622 [2021-11-25 19:48:50,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:48:50,004 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 74 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:50,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 128 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-25 19:48:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 595. [2021-11-25 19:48:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 537 states have (on average 1.3817504655493482) internal successors, (742), 568 states have internal predecessors, (742), 13 states have call successors, (13), 13 states have call predecessors, (13), 29 states have return successors, (51), 13 states have call predecessors, (51), 13 states have call successors, (51) [2021-11-25 19:48:50,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 806 transitions. [2021-11-25 19:48:50,023 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 806 transitions. Word has length 40 [2021-11-25 19:48:50,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:50,024 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 806 transitions. [2021-11-25 19:48:50,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-11-25 19:48:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 806 transitions. [2021-11-25 19:48:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 19:48:50,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:50,026 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, 1, 1, 1, 1] [2021-11-25 19:48:50,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-25 19:48:50,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 19:48:50,252 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:48:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1106991010, now seen corresponding path program 1 times [2021-11-25 19:48:50,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:50,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034869078] [2021-11-25 19:48:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:50,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:50,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:48:50,328 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:50,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034869078] [2021-11-25 19:48:50,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034869078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:48:50,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:48:50,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:48:50,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742353542] [2021-11-25 19:48:50,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:48:50,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:48:50,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:50,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:48:50,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:48:50,330 INFO L87 Difference]: Start difference. First operand 595 states and 806 transitions. Second operand has 3 states, 3 states have (on average 8.0) 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) [2021-11-25 19:48:50,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:50,340 INFO L93 Difference]: Finished difference Result 418 states and 539 transitions. [2021-11-25 19:48:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:48:50,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) 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 44 [2021-11-25 19:48:50,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:50,343 INFO L225 Difference]: With dead ends: 418 [2021-11-25 19:48:50,343 INFO L226 Difference]: Without dead ends: 418 [2021-11-25 19:48:50,344 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 [2021-11-25 19:48:50,344 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:50,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 94 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:48:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-25 19:48:50,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 334. [2021-11-25 19:48:50,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 300 states have (on average 1.3466666666666667) internal successors, (404), 317 states have internal predecessors, (404), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-11-25 19:48:50,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 435 transitions. [2021-11-25 19:48:50,354 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 435 transitions. Word has length 44 [2021-11-25 19:48:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:50,354 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 435 transitions. [2021-11-25 19:48:50,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) 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) [2021-11-25 19:48:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 435 transitions. [2021-11-25 19:48:50,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 19:48:50,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:50,356 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] [2021-11-25 19:48:50,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 19:48:50,356 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)] === [2021-11-25 19:48:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:50,357 INFO L85 PathProgramCache]: Analyzing trace with hash 78578931, now seen corresponding path program 1 times [2021-11-25 19:48:50,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:50,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229674646] [2021-11-25 19:48:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:50,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:50,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:50,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229674646] [2021-11-25 19:48:50,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229674646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:50,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072722547] [2021-11-25 19:48:50,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:50,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:50,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:50,420 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:50,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:48:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:50,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 19:48:50,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:50,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:50,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:48:50,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072722547] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:50,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788031982] [2021-11-25 19:48:50,725 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-25 19:48:50,725 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:50,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:50,726 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:50,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:50,868 INFO L354 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2021-11-25 19:48:50,868 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 [2021-11-25 19:48:51,297 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:48:51,298 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 [2021-11-25 19:48:51,736 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-25 19:48:51,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:51,855 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-25 19:48:51,856 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 [2021-11-25 19:48:51,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:51,874 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-25 19:48:51,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-11-25 19:48:51,938 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:53,935 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17216#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (< (select |#length| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4)) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:53,936 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:53,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:48:53,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2021-11-25 19:48:53,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719077956] [2021-11-25 19:48:53,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:53,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:48:53,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:53,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:48:53,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:48:53,938 INFO L87 Difference]: Start difference. First operand 334 states and 435 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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) [2021-11-25 19:48:54,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:54,073 INFO L93 Difference]: Finished difference Result 409 states and 516 transitions. [2021-11-25 19:48:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:48:54,074 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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 45 [2021-11-25 19:48:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:54,077 INFO L225 Difference]: With dead ends: 409 [2021-11-25 19:48:54,077 INFO L226 Difference]: Without dead ends: 409 [2021-11-25 19:48:54,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:48:54,078 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 122 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:54,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 204 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:48:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-11-25 19:48:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 387. [2021-11-25 19:48:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 350 states have (on average 1.3257142857142856) internal successors, (464), 366 states have internal predecessors, (464), 10 states have call successors, (10), 10 states have call predecessors, (10), 16 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-25 19:48:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 497 transitions. [2021-11-25 19:48:54,091 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 497 transitions. Word has length 45 [2021-11-25 19:48:54,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:54,092 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 497 transitions. [2021-11-25 19:48:54,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 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) [2021-11-25 19:48:54,092 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 497 transitions. [2021-11-25 19:48:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 19:48:54,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:54,093 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] [2021-11-25 19:48:54,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:54,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-25 19:48:54,321 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)] === [2021-11-25 19:48:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash 16349608, now seen corresponding path program 1 times [2021-11-25 19:48:54,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:54,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384549857] [2021-11-25 19:48:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:54,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:48:54,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:54,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384549857] [2021-11-25 19:48:54,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384549857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:54,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773716625] [2021-11-25 19:48:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:54,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:54,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:54,464 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:54,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 19:48:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:54,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 19:48:54,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:54,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:54,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:48:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:48:55,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:55,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773716625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:55,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1842351507] [2021-11-25 19:48:55,121 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 19:48:55,121 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:55,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:55,121 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:55,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:55,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:55,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:55,383 INFO L354 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2021-11-25 19:48:55,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2021-11-25 19:48:55,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:55,458 INFO L354 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2021-11-25 19:48:55,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2021-11-25 19:48:55,846 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2021-11-25 19:48:56,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,144 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:48:56,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-11-25 19:48:56,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:56,179 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 19:48:56,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 19:48:56,410 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:48:58,669 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18210#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (<= |parse_input_~input#1.base| 5) (= |#NULL.offset| 0) (< (select |#length| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4)) (< |parse_input_~i~0#1| 2) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:48:58,669 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:48:58,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:48:58,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2021-11-25 19:48:58,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955035509] [2021-11-25 19:48:58,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:48:58,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:48:58,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:48:58,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:48:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 19:48:58,671 INFO L87 Difference]: Start difference. First operand 387 states and 497 transitions. Second operand has 14 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:48:59,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:48:59,126 INFO L93 Difference]: Finished difference Result 462 states and 569 transitions. [2021-11-25 19:48:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:48:59,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 4 states have call successors, (6), 4 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 46 [2021-11-25 19:48:59,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:48:59,129 INFO L225 Difference]: With dead ends: 462 [2021-11-25 19:48:59,129 INFO L226 Difference]: Without dead ends: 462 [2021-11-25 19:48:59,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 67 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-11-25 19:48:59,130 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 271 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:48:59,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 221 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 229 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2021-11-25 19:48:59,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-25 19:48:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 432. [2021-11-25 19:48:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 392 states have (on average 1.3239795918367347) internal successors, (519), 409 states have internal predecessors, (519), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2021-11-25 19:48:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 554 transitions. [2021-11-25 19:48:59,144 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 554 transitions. Word has length 46 [2021-11-25 19:48:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:48:59,145 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 554 transitions. [2021-11-25 19:48:59,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:48:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 554 transitions. [2021-11-25 19:48:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 19:48:59,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:48:59,146 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:48:59,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:48:59,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-25 19:48:59,372 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:48:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:48:59,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1705702260, now seen corresponding path program 1 times [2021-11-25 19:48:59,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:48:59,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679015533] [2021-11-25 19:48:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:59,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:48:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:59,421 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:48:59,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:48:59,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679015533] [2021-11-25 19:48:59,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679015533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:48:59,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617744089] [2021-11-25 19:48:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:48:59,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:48:59,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:48:59,423 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:48:59,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 19:48:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:48:59,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 19:48:59,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:48:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:48:59,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:48:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:48:59,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617744089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:48:59,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [331805842] [2021-11-25 19:48:59,643 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 19:48:59,644 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:48:59,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:48:59,644 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:48:59,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:48:59,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:59,884 INFO L354 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2021-11-25 19:48:59,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2021-11-25 19:48:59,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:48:59,946 INFO L354 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2021-11-25 19:48:59,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2021-11-25 19:49:00,350 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2021-11-25 19:49:00,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:00,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:00,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:00,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:00,807 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:49:00,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-11-25 19:49:00,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:00,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:00,842 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 19:49:00,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 19:49:01,053 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:03,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [331805842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:03,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:49:03,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 3, 3] total 21 [2021-11-25 19:49:03,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697901095] [2021-11-25 19:49:03,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:03,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 19:49:03,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:03,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 19:49:03,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:49:03,321 INFO L87 Difference]: Start difference. First operand 432 states and 554 transitions. Second operand has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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) [2021-11-25 19:49:10,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:10,168 INFO L93 Difference]: Finished difference Result 471 states and 583 transitions. [2021-11-25 19:49:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 19:49:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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 45 [2021-11-25 19:49:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:10,170 INFO L225 Difference]: With dead ends: 471 [2021-11-25 19:49:10,170 INFO L226 Difference]: Without dead ends: 471 [2021-11-25 19:49:10,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 19:49:10,172 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 169 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:10,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 148 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:49:10,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-11-25 19:49:10,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 320. [2021-11-25 19:49:10,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 288 states have (on average 1.3263888888888888) internal successors, (382), 303 states have internal predecessors, (382), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-25 19:49:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 406 transitions. [2021-11-25 19:49:10,197 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 406 transitions. Word has length 45 [2021-11-25 19:49:10,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:10,198 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 406 transitions. [2021-11-25 19:49:10,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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) [2021-11-25 19:49:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 406 transitions. [2021-11-25 19:49:10,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:49:10,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:10,200 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-25 19:49:10,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:10,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-25 19:49:10,416 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:49:10,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1467897401, now seen corresponding path program 1 times [2021-11-25 19:49:10,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:10,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412297846] [2021-11-25 19:49:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:10,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:49:10,753 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:10,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412297846] [2021-11-25 19:49:10,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412297846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:10,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348057667] [2021-11-25 19:49:10,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:10,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:10,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:10,754 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:10,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 19:49:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:10,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 19:49:10,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:11,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:11,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:49:11,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:49:11,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:49:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:49:11,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:11,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348057667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:11,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1379841061] [2021-11-25 19:49:11,622 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 19:49:11,622 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:11,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:11,623 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:11,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:11,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:11,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:11,889 INFO L354 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2021-11-25 19:49:11,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2021-11-25 19:49:11,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:11,942 INFO L354 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2021-11-25 19:49:11,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2021-11-25 19:49:12,228 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2021-11-25 19:49:12,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:12,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:12,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:12,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:12,567 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:49:12,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-11-25 19:49:12,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:12,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:12,605 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 19:49:12,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 19:49:12,793 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:15,443 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20436#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (or (< |parse_input_#t~mem3#1.offset| 0) (<= (select |#length| |parse_input_#t~mem3#1.base|) |parse_input_#t~mem3#1.offset|)) (<= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2021-11-25 19:49:15,444 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:15,448 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:15,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 20 [2021-11-25 19:49:15,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214360519] [2021-11-25 19:49:15,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:15,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 19:49:15,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 19:49:15,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1444, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 19:49:15,452 INFO L87 Difference]: Start difference. First operand 320 states and 406 transitions. Second operand has 21 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:49:16,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:16,191 INFO L93 Difference]: Finished difference Result 403 states and 487 transitions. [2021-11-25 19:49:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 19:49:16,192 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2021-11-25 19:49:16,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:16,194 INFO L225 Difference]: With dead ends: 403 [2021-11-25 19:49:16,194 INFO L226 Difference]: Without dead ends: 403 [2021-11-25 19:49:16,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=374, Invalid=2278, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 19:49:16,196 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 489 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:16,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 167 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 320 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2021-11-25 19:49:16,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-25 19:49:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 320. [2021-11-25 19:49:16,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 288 states have (on average 1.3159722222222223) internal successors, (379), 303 states have internal predecessors, (379), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-25 19:49:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 403 transitions. [2021-11-25 19:49:16,207 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 403 transitions. Word has length 48 [2021-11-25 19:49:16,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:16,208 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 403 transitions. [2021-11-25 19:49:16,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:49:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 403 transitions. [2021-11-25 19:49:16,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:49:16,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:16,209 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-11-25 19:49:16,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:16,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-25 19:49:16,431 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:49:16,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:16,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2087117614, now seen corresponding path program 1 times [2021-11-25 19:49:16,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:16,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349175439] [2021-11-25 19:49:16,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:16,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:16,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:16,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349175439] [2021-11-25 19:49:16,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349175439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:16,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959927962] [2021-11-25 19:49:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:16,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:16,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:16,620 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:16,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 19:49:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:16,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 19:49:16,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:16,920 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:49:16,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 19:49:17,096 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:49:17,097 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 [2021-11-25 19:49:17,151 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:49:17,152 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 [2021-11-25 19:49:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:17,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:17,317 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:49:17,318 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 56 treesize of output 53 [2021-11-25 19:49:17,536 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:49:17,536 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 56 treesize of output 53 [2021-11-25 19:49:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:17,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959927962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:17,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [374756477] [2021-11-25 19:49:17,716 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 19:49:17,716 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:17,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:17,717 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:17,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:17,850 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:49:17,851 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 [2021-11-25 19:49:17,867 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-25 19:49:17,868 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 [2021-11-25 19:49:17,966 INFO L354 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2021-11-25 19:49:17,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2021-11-25 19:49:18,347 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-25 19:49:18,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,473 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-25 19:49:18,474 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 [2021-11-25 19:49:18,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,496 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-25 19:49:18,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-11-25 19:49:18,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:18,631 INFO L354 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2021-11-25 19:49:18,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2021-11-25 19:49:18,719 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:21,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21511#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (not (= (select |#valid| |~#commands~0.base|) 1)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= |#NULL.base| 0))' at error location [2021-11-25 19:49:21,424 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:21,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:49:21,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 10] total 27 [2021-11-25 19:49:21,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008793688] [2021-11-25 19:49:21,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:21,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-25 19:49:21,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:21,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-25 19:49:21,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1816, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 19:49:21,430 INFO L87 Difference]: Start difference. First operand 320 states and 403 transitions. Second operand has 28 states, 23 states have (on average 5.478260869565218) internal successors, (126), 26 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 19:49:21,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:21,719 INFO L93 Difference]: Finished difference Result 325 states and 407 transitions. [2021-11-25 19:49:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:49:21,720 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 5.478260869565218) internal successors, (126), 26 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2021-11-25 19:49:21,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:21,722 INFO L225 Difference]: With dead ends: 325 [2021-11-25 19:49:21,722 INFO L226 Difference]: Without dead ends: 325 [2021-11-25 19:49:21,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 19:49:21,724 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 278 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:21,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 92 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 147 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-11-25 19:49:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-25 19:49:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 319. [2021-11-25 19:49:21,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 1.3090277777777777) internal successors, (377), 302 states have internal predecessors, (377), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-25 19:49:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 401 transitions. [2021-11-25 19:49:21,736 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 401 transitions. Word has length 48 [2021-11-25 19:49:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:21,736 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 401 transitions. [2021-11-25 19:49:21,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 5.478260869565218) internal successors, (126), 26 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 19:49:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 401 transitions. [2021-11-25 19:49:21,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:49:21,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:21,738 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-11-25 19:49:21,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:21,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-25 19:49:21,951 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:49:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash 2087117615, now seen corresponding path program 1 times [2021-11-25 19:49:21,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:21,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936832452] [2021-11-25 19:49:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:21,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:49:22,122 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:22,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936832452] [2021-11-25 19:49:22,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936832452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:49:22,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:49:22,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 19:49:22,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549560278] [2021-11-25 19:49:22,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:22,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 19:49:22,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:22,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 19:49:22,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:49:22,124 INFO L87 Difference]: Start difference. First operand 319 states and 401 transitions. Second operand has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 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) [2021-11-25 19:49:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:22,350 INFO L93 Difference]: Finished difference Result 399 states and 482 transitions. [2021-11-25 19:49:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:49:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 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 48 [2021-11-25 19:49:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:22,352 INFO L225 Difference]: With dead ends: 399 [2021-11-25 19:49:22,352 INFO L226 Difference]: Without dead ends: 399 [2021-11-25 19:49:22,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:49:22,353 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 258 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:22,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 90 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:49:22,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-25 19:49:22,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 319. [2021-11-25 19:49:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 1.2986111111111112) internal successors, (374), 302 states have internal predecessors, (374), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-25 19:49:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 398 transitions. [2021-11-25 19:49:22,363 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 398 transitions. Word has length 48 [2021-11-25 19:49:22,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:22,363 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 398 transitions. [2021-11-25 19:49:22,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 states have internal predecessors, (43), 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) [2021-11-25 19:49:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 398 transitions. [2021-11-25 19:49:22,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 19:49:22,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:22,364 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:22,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-25 19:49:22,365 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:49:22,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:22,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1739820872, now seen corresponding path program 1 times [2021-11-25 19:49:22,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:22,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286646917] [2021-11-25 19:49:22,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:22,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:49:22,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:22,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286646917] [2021-11-25 19:49:22,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286646917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:22,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108291713] [2021-11-25 19:49:22,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:22,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:22,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:22,467 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:22,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 19:49:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:22,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:49:22,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:22,669 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:49:22,670 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 [2021-11-25 19:49:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:49:22,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:22,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108291713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:22,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1484068275] [2021-11-25 19:49:22,765 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 19:49:22,765 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:22,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:22,765 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:22,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:23,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:23,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:23,051 INFO L354 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2021-11-25 19:49:23,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2021-11-25 19:49:23,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:23,137 INFO L354 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2021-11-25 19:49:23,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2021-11-25 19:49:23,530 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2021-11-25 19:49:23,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:23,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:23,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:23,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:23,905 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:49:23,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-11-25 19:49:23,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:23,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:23,944 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 19:49:23,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 19:49:24,137 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:26,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23113#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2021-11-25 19:49:26,513 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:26,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:26,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-11-25 19:49:26,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286308253] [2021-11-25 19:49:26,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:26,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:49:26,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:26,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:49:26,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:49:26,515 INFO L87 Difference]: Start difference. First operand 319 states and 398 transitions. Second operand has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:49:26,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:26,746 INFO L93 Difference]: Finished difference Result 335 states and 404 transitions. [2021-11-25 19:49:26,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:49:26,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2021-11-25 19:49:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:26,748 INFO L225 Difference]: With dead ends: 335 [2021-11-25 19:49:26,748 INFO L226 Difference]: Without dead ends: 335 [2021-11-25 19:49:26,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 19:49:26,749 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 191 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:26,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 210 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 142 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2021-11-25 19:49:26,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-25 19:49:26,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 319. [2021-11-25 19:49:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 1.2916666666666667) internal successors, (372), 302 states have internal predecessors, (372), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-25 19:49:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 396 transitions. [2021-11-25 19:49:26,759 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 396 transitions. Word has length 49 [2021-11-25 19:49:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:26,759 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 396 transitions. [2021-11-25 19:49:26,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:49:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 396 transitions. [2021-11-25 19:49:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 19:49:26,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:26,761 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:26,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:26,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-25 19:49:26,974 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:49:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:26,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1702316402, now seen corresponding path program 2 times [2021-11-25 19:49:26,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:26,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135851339] [2021-11-25 19:49:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:26,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:49:27,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:27,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135851339] [2021-11-25 19:49:27,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135851339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:27,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610830038] [2021-11-25 19:49:27,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:49:27,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:27,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:27,091 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:27,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 19:49:27,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:49:27,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:49:27,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:49:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:27,297 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:49:27,297 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 [2021-11-25 19:49:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:49:27,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:27,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610830038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:27,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1194531038] [2021-11-25 19:49:27,520 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 19:49:27,520 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:27,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:27,520 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:27,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:27,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:27,810 INFO L354 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2021-11-25 19:49:27,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2021-11-25 19:49:27,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:27,869 INFO L354 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2021-11-25 19:49:27,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2021-11-25 19:49:28,243 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2021-11-25 19:49:28,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,611 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:49:28,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-11-25 19:49:28,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,649 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 19:49:28,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 19:49:28,881 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:31,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24048#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2021-11-25 19:49:31,306 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:31,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:31,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-11-25 19:49:31,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472405446] [2021-11-25 19:49:31,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:31,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 19:49:31,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:31,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 19:49:31,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:49:31,308 INFO L87 Difference]: Start difference. First operand 319 states and 396 transitions. Second operand has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 19:49:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:31,576 INFO L93 Difference]: Finished difference Result 333 states and 406 transitions. [2021-11-25 19:49:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:49:31,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2021-11-25 19:49:31,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:31,579 INFO L225 Difference]: With dead ends: 333 [2021-11-25 19:49:31,579 INFO L226 Difference]: Without dead ends: 333 [2021-11-25 19:49:31,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 19:49:31,581 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 163 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:31,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 206 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 134 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2021-11-25 19:49:31,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-25 19:49:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 319. [2021-11-25 19:49:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 1.2881944444444444) internal successors, (371), 302 states have internal predecessors, (371), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-25 19:49:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 395 transitions. [2021-11-25 19:49:31,590 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 395 transitions. Word has length 49 [2021-11-25 19:49:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:31,590 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 395 transitions. [2021-11-25 19:49:31,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 1 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 19:49:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 395 transitions. [2021-11-25 19:49:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 19:49:31,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:31,592 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:31,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:31,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:31,812 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:49:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:31,813 INFO L85 PathProgramCache]: Analyzing trace with hash 276136575, now seen corresponding path program 1 times [2021-11-25 19:49:31,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:31,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527027692] [2021-11-25 19:49:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:31,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:32,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:32,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527027692] [2021-11-25 19:49:32,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527027692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:32,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243427106] [2021-11-25 19:49:32,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:32,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:32,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:32,331 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:32,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-25 19:49:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:32,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 19:49:32,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:32,434 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 9 treesize of output 7 [2021-11-25 19:49:32,606 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:49:32,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 19:49:32,819 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-25 19:49:32,820 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 21 treesize of output 29 [2021-11-25 19:49:32,877 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 19:49:32,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-11-25 19:49:33,002 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 24 treesize of output 12 [2021-11-25 19:49:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:33,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:33,110 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-25 19:49:33,111 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 88 treesize of output 81 [2021-11-25 19:49:33,405 INFO L354 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2021-11-25 19:49:33,406 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 3 case distinctions, treesize of input 174 treesize of output 185 [2021-11-25 19:49:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:33,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243427106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:33,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1601653563] [2021-11-25 19:49:33,839 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 19:49:33,839 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:33,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:33,840 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:33,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:33,991 INFO L354 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2021-11-25 19:49:33,992 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 [2021-11-25 19:49:34,457 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:49:34,457 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 [2021-11-25 19:49:34,649 INFO L354 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2021-11-25 19:49:34,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2021-11-25 19:49:34,668 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 19:49:34,733 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 19:49:35,149 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-25 19:49:35,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:35,260 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-25 19:49:35,261 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 [2021-11-25 19:49:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:35,294 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-25 19:49:35,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-11-25 19:49:35,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:35,425 INFO L354 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2021-11-25 19:49:35,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2021-11-25 19:49:35,491 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:38,347 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25066#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#t~mem3#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= |parse_input_#in~input#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_#t~mem3#1.base|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:49:38,348 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:38,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:49:38,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 14] total 40 [2021-11-25 19:49:38,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017696054] [2021-11-25 19:49:38,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:38,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-25 19:49:38,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:38,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-25 19:49:38,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=3265, Unknown=0, NotChecked=0, Total=3660 [2021-11-25 19:49:38,350 INFO L87 Difference]: Start difference. First operand 319 states and 395 transitions. Second operand has 42 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 34 states have internal predecessors, (130), 6 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 19:49:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:40,394 INFO L93 Difference]: Finished difference Result 582 states and 694 transitions. [2021-11-25 19:49:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-25 19:49:40,395 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 34 states have internal predecessors, (130), 6 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 49 [2021-11-25 19:49:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:40,397 INFO L225 Difference]: With dead ends: 582 [2021-11-25 19:49:40,398 INFO L226 Difference]: Without dead ends: 582 [2021-11-25 19:49:40,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 106 SyntacticMatches, 10 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3555 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1170, Invalid=8532, Unknown=0, NotChecked=0, Total=9702 [2021-11-25 19:49:40,401 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 790 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:40,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [790 Valid, 717 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 939 Invalid, 0 Unknown, 123 Unchecked, 0.6s Time] [2021-11-25 19:49:40,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-25 19:49:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 470. [2021-11-25 19:49:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 429 states have (on average 1.303030303030303) internal successors, (559), 447 states have internal predecessors, (559), 11 states have call successors, (11), 11 states have call predecessors, (11), 20 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2021-11-25 19:49:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 594 transitions. [2021-11-25 19:49:40,414 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 594 transitions. Word has length 49 [2021-11-25 19:49:40,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:40,415 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 594 transitions. [2021-11-25 19:49:40,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 34 states have internal predecessors, (130), 6 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 19:49:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 594 transitions. [2021-11-25 19:49:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:49:40,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:40,417 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:40,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:40,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-25 19:49:40,644 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:49:40,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:40,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1900127767, now seen corresponding path program 1 times [2021-11-25 19:49:40,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:40,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647678106] [2021-11-25 19:49:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:40,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:49:40,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:40,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647678106] [2021-11-25 19:49:40,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647678106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:40,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960927296] [2021-11-25 19:49:40,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:40,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:40,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:40,774 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:40,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 19:49:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:40,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 19:49:40,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:41,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:49:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:49:41,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:41,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960927296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:41,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1108225798] [2021-11-25 19:49:41,295 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 19:49:41,295 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:41,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:41,296 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:41,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:41,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,606 INFO L354 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2021-11-25 19:49:41,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2021-11-25 19:49:41,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:41,674 INFO L354 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2021-11-25 19:49:41,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2021-11-25 19:49:42,083 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2021-11-25 19:49:42,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,449 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:49:42,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-11-25 19:49:42,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:42,488 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 19:49:42,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 19:49:42,707 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:45,160 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26418#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= (select |#length| |parse_input_~input#1.base|) |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_~input#1.base|) 1) (<= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2021-11-25 19:49:45,160 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:45,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:45,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2021-11-25 19:49:45,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725721018] [2021-11-25 19:49:45,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:45,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 19:49:45,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:45,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 19:49:45,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 19:49:45,162 INFO L87 Difference]: Start difference. First operand 470 states and 594 transitions. Second operand has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 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) [2021-11-25 19:49:45,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:45,500 INFO L93 Difference]: Finished difference Result 492 states and 598 transitions. [2021-11-25 19:49:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:49:45,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 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 50 [2021-11-25 19:49:45,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:45,502 INFO L225 Difference]: With dead ends: 492 [2021-11-25 19:49:45,502 INFO L226 Difference]: Without dead ends: 492 [2021-11-25 19:49:45,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 79 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2021-11-25 19:49:45,503 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 212 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:45,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 246 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 259 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2021-11-25 19:49:45,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-25 19:49:45,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 470. [2021-11-25 19:49:45,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 429 states have (on average 1.2797202797202798) internal successors, (549), 447 states have internal predecessors, (549), 11 states have call successors, (11), 11 states have call predecessors, (11), 20 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2021-11-25 19:49:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 584 transitions. [2021-11-25 19:49:45,515 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 584 transitions. Word has length 50 [2021-11-25 19:49:45,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:45,516 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 584 transitions. [2021-11-25 19:49:45,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 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) [2021-11-25 19:49:45,516 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 584 transitions. [2021-11-25 19:49:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:49:45,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:45,517 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:45,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:45,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:45,744 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:49:45,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:45,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1232200959, now seen corresponding path program 2 times [2021-11-25 19:49:45,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:45,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611121946] [2021-11-25 19:49:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:45,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:45,880 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:49:45,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:45,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611121946] [2021-11-25 19:49:45,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611121946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:45,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694535354] [2021-11-25 19:49:45,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:49:45,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:45,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:45,882 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:45,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 19:49:45,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:49:45,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:49:45,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 19:49:45,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:46,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:46,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:49:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:49:46,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:46,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694535354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:46,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2130845568] [2021-11-25 19:49:46,469 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 19:49:46,470 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:46,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:46,470 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:46,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:46,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:46,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:46,804 INFO L354 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2021-11-25 19:49:46,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2021-11-25 19:49:46,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:46,883 INFO L354 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2021-11-25 19:49:46,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2021-11-25 19:49:47,253 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2021-11-25 19:49:47,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:47,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:47,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:47,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:47,652 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:49:47,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-11-25 19:49:47,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:47,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:47,690 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 19:49:47,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 19:49:47,879 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:50,524 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27673#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= (select |#length| |parse_input_~input#1.base|) |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_~input#1.base|) 1) (<= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2021-11-25 19:49:50,525 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:50,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:50,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2021-11-25 19:49:50,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730133036] [2021-11-25 19:49:50,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:50,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 19:49:50,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:50,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 19:49:50,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:49:50,526 INFO L87 Difference]: Start difference. First operand 470 states and 584 transitions. Second operand has 17 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 19:49:50,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:50,878 INFO L93 Difference]: Finished difference Result 486 states and 597 transitions. [2021-11-25 19:49:50,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 19:49:50,878 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2021-11-25 19:49:50,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:50,881 INFO L225 Difference]: With dead ends: 486 [2021-11-25 19:49:50,881 INFO L226 Difference]: Without dead ends: 486 [2021-11-25 19:49:50,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 19:49:50,882 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 288 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:50,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 223 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 229 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-11-25 19:49:50,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-25 19:49:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 470. [2021-11-25 19:49:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 429 states have (on average 1.275058275058275) internal successors, (547), 447 states have internal predecessors, (547), 11 states have call successors, (11), 11 states have call predecessors, (11), 20 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2021-11-25 19:49:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 582 transitions. [2021-11-25 19:49:50,894 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 582 transitions. Word has length 50 [2021-11-25 19:49:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:50,895 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 582 transitions. [2021-11-25 19:49:50,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 states have internal predecessors, (74), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 19:49:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 582 transitions. [2021-11-25 19:49:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 19:49:50,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:50,896 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:50,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:51,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:51,111 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:49:51,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:51,111 INFO L85 PathProgramCache]: Analyzing trace with hash -920722335, now seen corresponding path program 1 times [2021-11-25 19:49:51,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:51,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007650157] [2021-11-25 19:49:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:51,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:51,333 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:51,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007650157] [2021-11-25 19:49:51,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007650157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:51,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226948820] [2021-11-25 19:49:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:51,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:51,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:51,334 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:51,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-25 19:49:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:51,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 19:49:51,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:51,514 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:49:51,514 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 [2021-11-25 19:49:51,671 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-11-25 19:49:51,671 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 2 case distinctions, treesize of input 15 treesize of output 23 [2021-11-25 19:49:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:51,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:52,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226948820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:52,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [38686822] [2021-11-25 19:49:52,069 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 19:49:52,069 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:52,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:52,070 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:52,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:52,211 INFO L354 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2021-11-25 19:49:52,211 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 [2021-11-25 19:49:52,530 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:49:52,530 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 [2021-11-25 19:49:52,718 INFO L354 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2021-11-25 19:49:52,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2021-11-25 19:49:52,728 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 19:49:52,787 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-25 19:49:53,140 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-25 19:49:53,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:53,247 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-25 19:49:53,247 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 [2021-11-25 19:49:53,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:53,269 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-25 19:49:53,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-11-25 19:49:53,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:53,406 INFO L354 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2021-11-25 19:49:53,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2021-11-25 19:49:53,500 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:56,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28931#(and (= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#t~mem3#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= |parse_input_#in~input#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_#t~mem3#1.base|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:49:56,159 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:56,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:56,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-11-25 19:49:56,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768153877] [2021-11-25 19:49:56,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:56,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 19:49:56,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:56,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 19:49:56,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 19:49:56,160 INFO L87 Difference]: Start difference. First operand 470 states and 582 transitions. Second operand has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:49:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:56,900 INFO L93 Difference]: Finished difference Result 497 states and 600 transitions. [2021-11-25 19:49:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 19:49:56,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 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 51 [2021-11-25 19:49:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:56,907 INFO L225 Difference]: With dead ends: 497 [2021-11-25 19:49:56,907 INFO L226 Difference]: Without dead ends: 497 [2021-11-25 19:49:56,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 103 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=459, Invalid=2621, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 19:49:56,908 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 364 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:56,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 355 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 281 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2021-11-25 19:49:56,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-11-25 19:49:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 470. [2021-11-25 19:49:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 429 states have (on average 1.2703962703962703) internal successors, (545), 447 states have internal predecessors, (545), 11 states have call successors, (11), 11 states have call predecessors, (11), 20 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2021-11-25 19:49:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 580 transitions. [2021-11-25 19:49:56,921 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 580 transitions. Word has length 51 [2021-11-25 19:49:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:56,921 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 580 transitions. [2021-11-25 19:49:56,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:49:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 580 transitions. [2021-11-25 19:49:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:49:56,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:56,923 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1] [2021-11-25 19:49:56,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:57,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-25 19:49:57,136 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:49:57,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:57,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1618330282, now seen corresponding path program 1 times [2021-11-25 19:49:57,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:57,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776346281] [2021-11-25 19:49:57,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:57,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:49:57,202 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:57,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776346281] [2021-11-25 19:49:57,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776346281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:57,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838538715] [2021-11-25 19:49:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:57,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:57,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:57,204 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:57,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-25 19:49:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:57,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:49:57,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:49:57,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:49:57,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838538715] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:57,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:57,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 9 [2021-11-25 19:49:57,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650162705] [2021-11-25 19:49:57,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:49:57,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:49:57,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:49:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:49:57,609 INFO L87 Difference]: Start difference. First operand 470 states and 580 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 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) [2021-11-25 19:49:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:57,679 INFO L93 Difference]: Finished difference Result 419 states and 494 transitions. [2021-11-25 19:49:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:49:57,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 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 52 [2021-11-25 19:49:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:57,681 INFO L225 Difference]: With dead ends: 419 [2021-11-25 19:49:57,681 INFO L226 Difference]: Without dead ends: 395 [2021-11-25 19:49:57,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:49:57,682 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 72 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:57,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 137 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:49:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-25 19:49:57,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 328. [2021-11-25 19:49:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 299 states have (on average 1.2408026755852843) internal successors, (371), 311 states have internal predecessors, (371), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2021-11-25 19:49:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 392 transitions. [2021-11-25 19:49:57,691 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 392 transitions. Word has length 52 [2021-11-25 19:49:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:57,691 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 392 transitions. [2021-11-25 19:49:57,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 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) [2021-11-25 19:49:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 392 transitions. [2021-11-25 19:49:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:49:57,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:57,693 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:57,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:57,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-25 19:49:57,908 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:49:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:57,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1522378736, now seen corresponding path program 1 times [2021-11-25 19:49:57,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:57,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939786618] [2021-11-25 19:49:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:57,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:58,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:58,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939786618] [2021-11-25 19:49:58,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939786618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:58,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914850549] [2021-11-25 19:49:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:58,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:58,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:58,122 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:58,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 19:49:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:58,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-25 19:49:58,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:58,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:58,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:49:58,771 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:49:58,771 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 [2021-11-25 19:49:58,776 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 7 treesize of output 3 [2021-11-25 19:49:58,778 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 7 treesize of output 3 [2021-11-25 19:49:58,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:58,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:49:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:49:59,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:59,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914850549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:49:59,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1722774500] [2021-11-25 19:49:59,137 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 19:49:59,137 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:59,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:59,138 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:59,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:59,236 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:49:59,237 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 [2021-11-25 19:49:59,257 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-25 19:49:59,257 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 [2021-11-25 19:49:59,350 INFO L354 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2021-11-25 19:49:59,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2021-11-25 19:49:59,671 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-25 19:49:59,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:59,791 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-25 19:49:59,792 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 [2021-11-25 19:49:59,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:59,818 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-25 19:49:59,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-11-25 19:49:59,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:59,945 INFO L354 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2021-11-25 19:49:59,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2021-11-25 19:50:00,004 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:50:02,354 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31228#(and (<= (select |#length| |parse_input_~input#1.base|) |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#t~mem3#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= |parse_input_#in~input#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_#t~mem3#1.base|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:50:02,354 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:50:02,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:50:02,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2021-11-25 19:50:02,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244969219] [2021-11-25 19:50:02,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:02,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 19:50:02,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:02,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 19:50:02,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 19:50:02,356 INFO L87 Difference]: Start difference. First operand 328 states and 392 transitions. Second operand has 24 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 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) [2021-11-25 19:50:03,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:03,761 INFO L93 Difference]: Finished difference Result 482 states and 570 transitions. [2021-11-25 19:50:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 19:50:03,761 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 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 52 [2021-11-25 19:50:03,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:03,763 INFO L225 Difference]: With dead ends: 482 [2021-11-25 19:50:03,763 INFO L226 Difference]: Without dead ends: 482 [2021-11-25 19:50:03,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=809, Invalid=4891, Unknown=0, NotChecked=0, Total=5700 [2021-11-25 19:50:03,764 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 612 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:03,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [612 Valid, 486 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 494 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2021-11-25 19:50:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-11-25 19:50:03,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 327. [2021-11-25 19:50:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 299 states have (on average 1.2274247491638797) internal successors, (367), 310 states have internal predecessors, (367), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2021-11-25 19:50:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 388 transitions. [2021-11-25 19:50:03,772 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 388 transitions. Word has length 52 [2021-11-25 19:50:03,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:03,772 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 388 transitions. [2021-11-25 19:50:03,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 17 states have (on average 5.529411764705882) internal successors, (94), 16 states have internal predecessors, (94), 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) [2021-11-25 19:50:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 388 transitions. [2021-11-25 19:50:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 19:50:03,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:03,774 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:03,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:03,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-25 19:50:03,987 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:50:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:03,988 INFO L85 PathProgramCache]: Analyzing trace with hash -219031633, now seen corresponding path program 2 times [2021-11-25 19:50:03,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:03,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760782922] [2021-11-25 19:50:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:03,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:50:04,139 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:04,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760782922] [2021-11-25 19:50:04,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760782922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:04,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597375945] [2021-11-25 19:50:04,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:50:04,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:04,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:04,141 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:04,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-25 19:50:04,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:50:04,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:50:04,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:50:04,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:04,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-11-25 19:50:04,509 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:50:04,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 19:50:04,620 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 19 treesize of output 21 [2021-11-25 19:50:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 41 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:50:04,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:04,913 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:50:04,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 19:50:05,231 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:50:05,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 19:50:05,295 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 24 treesize of output 20 [2021-11-25 19:50:05,440 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 18 treesize of output 14 [2021-11-25 19:50:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:50:05,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597375945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:05,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211690113] [2021-11-25 19:50:05,455 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 19:50:05,456 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:50:05,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:50:05,456 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:50:05,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:50:05,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:05,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:05,772 INFO L354 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2021-11-25 19:50:05,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2021-11-25 19:50:05,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:05,840 INFO L354 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2021-11-25 19:50:05,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2021-11-25 19:50:06,203 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2021-11-25 19:50:06,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:06,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:06,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:06,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:06,593 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:50:06,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-11-25 19:50:06,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:06,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:06,627 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 19:50:06,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 19:50:06,793 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:50:09,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32465#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (< (select |#length| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4)) (< |parse_input_~i~0#1| 2) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2021-11-25 19:50:09,215 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:50:09,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:50:09,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 28 [2021-11-25 19:50:09,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53386035] [2021-11-25 19:50:09,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:09,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 19:50:09,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:09,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 19:50:09,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 19:50:09,217 INFO L87 Difference]: Start difference. First operand 327 states and 388 transitions. Second operand has 29 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 27 states have internal predecessors, (135), 6 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 19:50:09,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:09,894 INFO L93 Difference]: Finished difference Result 408 states and 470 transitions. [2021-11-25 19:50:09,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-25 19:50:09,894 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 27 states have internal predecessors, (135), 6 states have call successors, (9), 8 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 54 [2021-11-25 19:50:09,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:09,896 INFO L225 Difference]: With dead ends: 408 [2021-11-25 19:50:09,896 INFO L226 Difference]: Without dead ends: 408 [2021-11-25 19:50:09,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=717, Invalid=3315, Unknown=0, NotChecked=0, Total=4032 [2021-11-25 19:50:09,897 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 518 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:09,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 400 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 327 Invalid, 0 Unknown, 232 Unchecked, 0.2s Time] [2021-11-25 19:50:09,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-25 19:50:09,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 329. [2021-11-25 19:50:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 301 states have (on average 1.2159468438538206) internal successors, (366), 312 states have internal predecessors, (366), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2021-11-25 19:50:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 387 transitions. [2021-11-25 19:50:09,902 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 387 transitions. Word has length 54 [2021-11-25 19:50:09,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:09,902 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 387 transitions. [2021-11-25 19:50:09,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 27 states have internal predecessors, (135), 6 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 19:50:09,902 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 387 transitions. [2021-11-25 19:50:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 19:50:09,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:09,903 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:09,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-25 19:50:10,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-25 19:50:10,123 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:50:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:10,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1799953919, now seen corresponding path program 1 times [2021-11-25 19:50:10,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:10,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523769757] [2021-11-25 19:50:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:10,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:50:10,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:10,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523769757] [2021-11-25 19:50:10,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523769757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:10,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207197947] [2021-11-25 19:50:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:10,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:10,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:10,312 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:10,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-25 19:50:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:10,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 19:50:10,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:10,719 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:50:10,719 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 [2021-11-25 19:50:10,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 19:50:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:50:10,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:10,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207197947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:10,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [505675890] [2021-11-25 19:50:10,962 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 19:50:10,962 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:50:10,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:50:10,963 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:50:10,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:50:11,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:11,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:11,250 INFO L354 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2021-11-25 19:50:11,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2021-11-25 19:50:11,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:11,324 INFO L354 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2021-11-25 19:50:11,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2021-11-25 19:50:11,667 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2021-11-25 19:50:11,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:11,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:11,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:12,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:12,004 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:50:12,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-11-25 19:50:12,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:12,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:12,059 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 19:50:12,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 19:50:12,234 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:50:14,548 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33491#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2021-11-25 19:50:14,548 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:50:14,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:50:14,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2021-11-25 19:50:14,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592255178] [2021-11-25 19:50:14,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:14,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 19:50:14,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:14,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 19:50:14,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 19:50:14,550 INFO L87 Difference]: Start difference. First operand 329 states and 387 transitions. Second operand has 16 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 19:50:14,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:14,970 INFO L93 Difference]: Finished difference Result 390 states and 445 transitions. [2021-11-25 19:50:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 19:50:14,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-11-25 19:50:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:14,972 INFO L225 Difference]: With dead ends: 390 [2021-11-25 19:50:14,972 INFO L226 Difference]: Without dead ends: 390 [2021-11-25 19:50:14,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 19:50:14,973 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 264 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:14,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 298 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 246 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2021-11-25 19:50:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-25 19:50:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 329. [2021-11-25 19:50:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 301 states have (on average 1.212624584717608) internal successors, (365), 312 states have internal predecessors, (365), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2021-11-25 19:50:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 386 transitions. [2021-11-25 19:50:14,982 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 386 transitions. Word has length 55 [2021-11-25 19:50:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:14,983 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 386 transitions. [2021-11-25 19:50:14,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-25 19:50:14,983 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 386 transitions. [2021-11-25 19:50:14,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:50:14,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:14,990 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:15,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:15,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-25 19:50:15,212 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:50:15,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:15,213 INFO L85 PathProgramCache]: Analyzing trace with hash -36003314, now seen corresponding path program 2 times [2021-11-25 19:50:15,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:15,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734515860] [2021-11-25 19:50:15,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:15,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:50:15,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:15,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734515860] [2021-11-25 19:50:15,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734515860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:15,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702325565] [2021-11-25 19:50:15,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:50:15,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:15,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:15,505 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:15,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-25 19:50:15,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:50:15,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:50:15,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-25 19:50:15,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:16,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:16,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:16,952 INFO L354 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2021-11-25 19:50:16,953 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 45 [2021-11-25 19:50:16,966 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:50:16,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 19:50:17,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:17,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,410 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-11-25 19:50:17,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:17,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:50:17,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:50:17,418 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 24 treesize of output 13 [2021-11-25 19:50:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:50:17,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:18,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702325565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:18,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794651814] [2021-11-25 19:50:18,269 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-25 19:50:18,269 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:50:18,269 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:50:18,270 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:50:18,270 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:50:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:18,551 INFO L354 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2021-11-25 19:50:18,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2021-11-25 19:50:18,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:18,618 INFO L354 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2021-11-25 19:50:18,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2021-11-25 19:50:19,014 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2021-11-25 19:50:19,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:19,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:19,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:19,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:19,406 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:50:19,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2021-11-25 19:50:19,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:19,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:19,446 INFO L354 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2021-11-25 19:50:19,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2021-11-25 19:50:19,724 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:50:23,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34485#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (or (< |parse_input_#t~mem3#1.offset| 0) (<= (select |#length| |parse_input_#t~mem3#1.base|) |parse_input_#t~mem3#1.offset|)) (<= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2021-11-25 19:50:23,076 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:50:23,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:50:23,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 20 [2021-11-25 19:50:23,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534802190] [2021-11-25 19:50:23,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:23,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 19:50:23,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:23,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 19:50:23,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1771, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 19:50:23,078 INFO L87 Difference]: Start difference. First operand 329 states and 386 transitions. Second operand has 22 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 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) [2021-11-25 19:50:24,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:24,940 INFO L93 Difference]: Finished difference Result 831 states and 964 transitions. [2021-11-25 19:50:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-25 19:50:24,941 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 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 56 [2021-11-25 19:50:24,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:24,945 INFO L225 Difference]: With dead ends: 831 [2021-11-25 19:50:24,945 INFO L226 Difference]: Without dead ends: 831 [2021-11-25 19:50:24,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=773, Invalid=5079, Unknown=0, NotChecked=0, Total=5852 [2021-11-25 19:50:24,947 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 411 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:24,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 449 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 665 Invalid, 0 Unknown, 145 Unchecked, 0.6s Time] [2021-11-25 19:50:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-25 19:50:24,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 582. [2021-11-25 19:50:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 540 states have (on average 1.237037037037037) internal successors, (668), 556 states have internal predecessors, (668), 13 states have call successors, (13), 12 states have call predecessors, (13), 21 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2021-11-25 19:50:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 712 transitions. [2021-11-25 19:50:24,965 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 712 transitions. Word has length 56 [2021-11-25 19:50:24,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:24,965 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 712 transitions. [2021-11-25 19:50:24,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 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) [2021-11-25 19:50:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 712 transitions. [2021-11-25 19:50:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:50:24,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:24,967 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:25,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:25,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-25 19:50:25,196 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:50:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:25,196 INFO L85 PathProgramCache]: Analyzing trace with hash -218314186, now seen corresponding path program 1 times [2021-11-25 19:50:25,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:25,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073383914] [2021-11-25 19:50:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:25,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:25,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:25,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073383914] [2021-11-25 19:50:25,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073383914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:25,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092967617] [2021-11-25 19:50:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:25,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:25,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:25,608 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:25,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-25 19:50:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:25,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 19:50:25,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:26,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:26,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:50:26,229 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:50:26,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 19:50:26,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:26,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:50:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:26,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:26,665 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:50:26,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 19:50:26,992 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:50:26,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-25 19:50:27,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092967617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:27,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1257760239] [2021-11-25 19:50:27,137 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-25 19:50:27,137 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:50:27,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:50:27,137 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:50:27,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:50:27,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:27,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:27,377 INFO L354 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2021-11-25 19:50:27,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2021-11-25 19:50:27,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:27,443 INFO L354 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2021-11-25 19:50:27,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2021-11-25 19:50:27,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:27,688 INFO L354 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2021-11-25 19:50:27,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 214 treesize of output 270 [2021-11-25 19:50:28,149 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-25 19:50:28,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:28,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:28,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:28,609 INFO L354 Elim1Store]: treesize reduction 157, result has 20.7 percent of original size [2021-11-25 19:50:28,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 246 [2021-11-25 19:50:28,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:28,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:28,683 INFO L354 Elim1Store]: treesize reduction 179, result has 30.6 percent of original size [2021-11-25 19:50:28,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 221 treesize of output 266 [2021-11-25 19:50:29,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:29,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:29,116 INFO L354 Elim1Store]: treesize reduction 232, result has 29.5 percent of original size [2021-11-25 19:50:29,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 559 treesize of output 563 [2021-11-25 19:50:29,456 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:50:35,169 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36290#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_~input#1.base| 5) (< (select |#length| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4)) (< |parse_input_~i~0#1| 2) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:50:35,169 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:50:35,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:50:35,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 24 [2021-11-25 19:50:35,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691482693] [2021-11-25 19:50:35,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:35,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 19:50:35,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:35,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 19:50:35,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2380, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 19:50:35,171 INFO L87 Difference]: Start difference. First operand 582 states and 712 transitions. Second operand has 26 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 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) [2021-11-25 19:50:36,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:36,980 INFO L93 Difference]: Finished difference Result 644 states and 756 transitions. [2021-11-25 19:50:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-25 19:50:36,980 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 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 56 [2021-11-25 19:50:36,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:36,983 INFO L225 Difference]: With dead ends: 644 [2021-11-25 19:50:36,983 INFO L226 Difference]: Without dead ends: 644 [2021-11-25 19:50:36,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=944, Invalid=6028, Unknown=0, NotChecked=0, Total=6972 [2021-11-25 19:50:36,985 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 686 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:36,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 406 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 577 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2021-11-25 19:50:36,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-11-25 19:50:36,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 585. [2021-11-25 19:50:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 546 states have (on average 1.1996336996336996) internal successors, (655), 559 states have internal predecessors, (655), 13 states have call successors, (13), 12 states have call predecessors, (13), 21 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2021-11-25 19:50:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 699 transitions. [2021-11-25 19:50:37,000 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 699 transitions. Word has length 56 [2021-11-25 19:50:37,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:37,000 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 699 transitions. [2021-11-25 19:50:37,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 4.636363636363637) internal successors, (102), 22 states have internal predecessors, (102), 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) [2021-11-25 19:50:37,001 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 699 transitions. [2021-11-25 19:50:37,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 19:50:37,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:37,002 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:37,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:37,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-25 19:50:37,228 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:50:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:37,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1555393146, now seen corresponding path program 1 times [2021-11-25 19:50:37,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:37,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301736115] [2021-11-25 19:50:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:37,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:50:37,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:37,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301736115] [2021-11-25 19:50:37,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301736115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:37,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018558136] [2021-11-25 19:50:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:37,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:37,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:37,690 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:37,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-25 19:50:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:37,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 19:50:37,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:38,086 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:50:38,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 19:50:38,497 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-25 19:50:38,497 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 21 treesize of output 29 [2021-11-25 19:50:38,572 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 19:50:38,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-11-25 19:50:38,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:50:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:50:38,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:38,880 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-25 19:50:38,880 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 178 treesize of output 165 [2021-11-25 19:50:39,298 INFO L354 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2021-11-25 19:50:39,299 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 3 case distinctions, treesize of input 174 treesize of output 185 [2021-11-25 19:50:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:50:39,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018558136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:39,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1585962205] [2021-11-25 19:50:39,789 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-25 19:50:39,789 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:50:39,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:50:39,789 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:50:39,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:50:40,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:40,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:40,060 INFO L354 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2021-11-25 19:50:40,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2021-11-25 19:50:40,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:40,122 INFO L354 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2021-11-25 19:50:40,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2021-11-25 19:50:40,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:40,285 INFO L354 Elim1Store]: treesize reduction 207, result has 26.1 percent of original size [2021-11-25 19:50:40,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 188 treesize of output 225 [2021-11-25 19:50:40,708 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-25 19:50:41,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:41,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:41,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:41,192 INFO L354 Elim1Store]: treesize reduction 157, result has 20.7 percent of original size [2021-11-25 19:50:41,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 246 [2021-11-25 19:50:41,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:41,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:41,291 INFO L354 Elim1Store]: treesize reduction 179, result has 30.6 percent of original size [2021-11-25 19:50:41,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 221 treesize of output 266 [2021-11-25 19:50:41,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:41,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:41,619 INFO L354 Elim1Store]: treesize reduction 232, result has 29.5 percent of original size [2021-11-25 19:50:41,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 250 treesize of output 306 [2021-11-25 19:50:41,825 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:50:47,511 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37984#(and (or (and (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (- 9) |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) 1) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_~i~0#1| 1) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (- 9) |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (- 9) |~#commands~0.offset| (* |parse_input_~i~0#1| 9))))) (= |#NULL.offset| 0) (= |parse_input_#t~mem3#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= |parse_input_#in~input#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_#t~mem3#1.base|) (= |old(~global~0.offset)| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (- 9) |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0)) (and (= 6 |~#commands~0.base|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (= |#NULL.offset| 0) (= |parse_input_#t~mem3#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= |parse_input_#in~input#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_#t~mem3#1.base|) (= |old(~global~0.offset)| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))) (<= 0 ~global~0.offset) (<= ~global~0.offset 0) (<= 3 |parse_input_#in~input#1.base|) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5))' at error location [2021-11-25 19:50:47,511 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:50:47,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:50:47,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 14] total 42 [2021-11-25 19:50:47,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204288962] [2021-11-25 19:50:47,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:47,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 19:50:47,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:47,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 19:50:47,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=3463, Unknown=0, NotChecked=0, Total=3906 [2021-11-25 19:50:47,513 INFO L87 Difference]: Start difference. First operand 585 states and 699 transitions. Second operand has 43 states, 37 states have (on average 3.864864864864865) internal successors, (143), 35 states have internal predecessors, (143), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 19:50:48,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:48,426 INFO L93 Difference]: Finished difference Result 662 states and 780 transitions. [2021-11-25 19:50:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:50:48,427 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 3.864864864864865) internal successors, (143), 35 states have internal predecessors, (143), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 57 [2021-11-25 19:50:48,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:48,430 INFO L225 Difference]: With dead ends: 662 [2021-11-25 19:50:48,430 INFO L226 Difference]: Without dead ends: 662 [2021-11-25 19:50:48,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=777, Invalid=4625, Unknown=0, NotChecked=0, Total=5402 [2021-11-25 19:50:48,431 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 591 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:48,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 209 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 420 Invalid, 0 Unknown, 22 Unchecked, 0.3s Time] [2021-11-25 19:50:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-11-25 19:50:48,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 592. [2021-11-25 19:50:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 553 states have (on average 1.197106690777577) internal successors, (662), 566 states have internal predecessors, (662), 13 states have call successors, (13), 12 states have call predecessors, (13), 21 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2021-11-25 19:50:48,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 706 transitions. [2021-11-25 19:50:48,446 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 706 transitions. Word has length 57 [2021-11-25 19:50:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:48,446 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 706 transitions. [2021-11-25 19:50:48,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 3.864864864864865) internal successors, (143), 35 states have internal predecessors, (143), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 19:50:48,447 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 706 transitions. [2021-11-25 19:50:48,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 19:50:48,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:48,448 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:48,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:48,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-25 19:50:48,676 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:50:48,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:48,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1822194776, now seen corresponding path program 2 times [2021-11-25 19:50:48,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:48,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078682091] [2021-11-25 19:50:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:48,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:49,113 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:49,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078682091] [2021-11-25 19:50:49,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078682091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:49,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142910850] [2021-11-25 19:50:49,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:50:49,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:49,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:49,115 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:49,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-25 19:50:49,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:50:49,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:50:49,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 19:50:49,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:50:49,489 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:50:49,489 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 [2021-11-25 19:50:49,776 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-11-25 19:50:49,777 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 2 case distinctions, treesize of input 15 treesize of output 23 [2021-11-25 19:50:49,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 19:50:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:49,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:50:50,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142910850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:50,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [211370216] [2021-11-25 19:50:50,051 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-25 19:50:50,051 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:50:50,052 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:50:50,052 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:50:50,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:50:50,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:50,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:50,290 INFO L354 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2021-11-25 19:50:50,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2021-11-25 19:50:50,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:50,351 INFO L354 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2021-11-25 19:50:50,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2021-11-25 19:50:50,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:50,529 INFO L354 Elim1Store]: treesize reduction 207, result has 26.1 percent of original size [2021-11-25 19:50:50,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 188 treesize of output 225 [2021-11-25 19:50:50,861 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-25 19:50:51,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:51,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:51,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:51,314 INFO L354 Elim1Store]: treesize reduction 157, result has 20.7 percent of original size [2021-11-25 19:50:51,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 246 [2021-11-25 19:50:51,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:51,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:51,406 INFO L354 Elim1Store]: treesize reduction 179, result has 30.6 percent of original size [2021-11-25 19:50:51,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 221 treesize of output 266 [2021-11-25 19:50:51,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:51,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:51,679 INFO L354 Elim1Store]: treesize reduction 232, result has 29.5 percent of original size [2021-11-25 19:50:51,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 250 treesize of output 306 [2021-11-25 19:50:51,986 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:50:57,200 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39524#(and (or (and (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (- 9) |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) 1) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_~i~0#1| 1) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (- 9) |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (- 9) |~#commands~0.offset| (* |parse_input_~i~0#1| 9))))) (= |#NULL.offset| 0) (= |parse_input_#t~mem3#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= |parse_input_#in~input#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_#t~mem3#1.base|) (= |old(~global~0.offset)| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (- 9) |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0)) (and (= 6 |~#commands~0.base|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (= |#NULL.offset| 0) (= |parse_input_#t~mem3#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= |parse_input_#in~input#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_#t~mem3#1.base|) (= |old(~global~0.offset)| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))) (<= 0 ~global~0.offset) (<= ~global~0.offset 0) (<= 3 |parse_input_#in~input#1.base|) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5))' at error location [2021-11-25 19:50:57,200 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:50:57,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:50:57,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-11-25 19:50:57,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358153723] [2021-11-25 19:50:57,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:57,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 19:50:57,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:57,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 19:50:57,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 19:50:57,202 INFO L87 Difference]: Start difference. First operand 592 states and 706 transitions. Second operand has 25 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 states have internal predecessors, (103), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:50:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:58,690 INFO L93 Difference]: Finished difference Result 650 states and 760 transitions. [2021-11-25 19:50:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-25 19:50:58,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 states have internal predecessors, (103), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2021-11-25 19:50:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:58,692 INFO L225 Difference]: With dead ends: 650 [2021-11-25 19:50:58,692 INFO L226 Difference]: Without dead ends: 650 [2021-11-25 19:50:58,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=626, Invalid=4486, Unknown=0, NotChecked=0, Total=5112 [2021-11-25 19:50:58,693 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 488 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:58,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 448 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 520 Invalid, 0 Unknown, 179 Unchecked, 0.3s Time] [2021-11-25 19:50:58,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-25 19:50:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 587. [2021-11-25 19:50:58,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 549 states have (on average 1.1894353369763206) internal successors, (653), 561 states have internal predecessors, (653), 13 states have call successors, (13), 12 states have call predecessors, (13), 21 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2021-11-25 19:50:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 697 transitions. [2021-11-25 19:50:58,707 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 697 transitions. Word has length 57 [2021-11-25 19:50:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:58,707 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 697 transitions. [2021-11-25 19:50:58,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 4.478260869565218) internal successors, (103), 22 states have internal predecessors, (103), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:50:58,707 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 697 transitions. [2021-11-25 19:50:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 19:50:58,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:58,709 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:58,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-25 19:50:58,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-25 19:50:58,924 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:50:58,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2098408529, now seen corresponding path program 1 times [2021-11-25 19:50:58,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:58,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163924171] [2021-11-25 19:50:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:58,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:50:59,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:59,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163924171] [2021-11-25 19:50:59,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163924171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:50:59,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:50:59,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:50:59,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768383339] [2021-11-25 19:50:59,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:50:59,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:50:59,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:59,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:50:59,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:50:59,157 INFO L87 Difference]: Start difference. First operand 587 states and 697 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2021-11-25 19:50:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:50:59,225 INFO L93 Difference]: Finished difference Result 580 states and 662 transitions. [2021-11-25 19:50:59,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:50:59,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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 58 [2021-11-25 19:50:59,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:50:59,234 INFO L225 Difference]: With dead ends: 580 [2021-11-25 19:50:59,234 INFO L226 Difference]: Without dead ends: 580 [2021-11-25 19:50:59,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:50:59,235 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 98 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:50:59,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 149 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:50:59,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-25 19:50:59,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 533. [2021-11-25 19:50:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 495 states have (on average 1.1595959595959595) internal successors, (574), 507 states have internal predecessors, (574), 13 states have call successors, (13), 12 states have call predecessors, (13), 21 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2021-11-25 19:50:59,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 614 transitions. [2021-11-25 19:50:59,246 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 614 transitions. Word has length 58 [2021-11-25 19:50:59,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:50:59,246 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 614 transitions. [2021-11-25 19:50:59,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2021-11-25 19:50:59,246 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 614 transitions. [2021-11-25 19:50:59,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 19:50:59,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:50:59,248 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:50:59,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-25 19:50:59,248 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:50:59,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:50:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash 653463253, now seen corresponding path program 1 times [2021-11-25 19:50:59,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:50:59,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881564695] [2021-11-25 19:50:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:59,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:50:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:50:59,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:59,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881564695] [2021-11-25 19:50:59,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881564695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:50:59,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679323702] [2021-11-25 19:50:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:50:59,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:50:59,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:50:59,603 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:50:59,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-25 19:50:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:50:59,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-25 19:50:59,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:00,345 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:51:00,346 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 [2021-11-25 19:51:00,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:51:00,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:00,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:51:01,258 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 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-25 19:51:01,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:51:01,264 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 22 treesize of output 10 [2021-11-25 19:51:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:51:01,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:01,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679323702] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:51:01,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1853706832] [2021-11-25 19:51:01,581 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2021-11-25 19:51:01,581 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:51:01,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:51:01,582 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:51:01,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:51:01,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:01,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:01,853 INFO L354 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2021-11-25 19:51:01,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2021-11-25 19:51:01,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:01,924 INFO L354 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2021-11-25 19:51:01,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2021-11-25 19:51:02,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:02,129 INFO L354 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2021-11-25 19:51:02,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 214 treesize of output 270 [2021-11-25 19:51:02,661 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-25 19:51:03,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:03,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:03,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:03,204 INFO L354 Elim1Store]: treesize reduction 157, result has 20.7 percent of original size [2021-11-25 19:51:03,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 246 [2021-11-25 19:51:03,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:03,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:03,276 INFO L354 Elim1Store]: treesize reduction 179, result has 30.6 percent of original size [2021-11-25 19:51:03,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 221 treesize of output 266 [2021-11-25 19:51:03,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:03,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:03,697 INFO L354 Elim1Store]: treesize reduction 232, result has 29.5 percent of original size [2021-11-25 19:51:03,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 547 treesize of output 551 [2021-11-25 19:51:04,368 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:51:09,875 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42205#(and (or (and (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (- 9) |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) 1) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_~i~0#1| 1) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (- 9) |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (- 9) |~#commands~0.offset| (* |parse_input_~i~0#1| 9))))) (= |#NULL.offset| 0) (= |parse_input_#t~mem3#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= |parse_input_#in~input#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_#t~mem3#1.base|) (= |old(~global~0.offset)| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (- 9) |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0)) (and (= 6 |~#commands~0.base|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (= |#NULL.offset| 0) (= |parse_input_#t~mem3#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= |parse_input_#in~input#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_#t~mem3#1.base|) (= |old(~global~0.offset)| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))) (or (< |parse_input_#t~mem3#1.offset| 0) (<= (select |#length| |parse_input_#t~mem3#1.base|) |parse_input_#t~mem3#1.offset|)) (<= 0 ~global~0.offset) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= ~global~0.offset 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5))' at error location [2021-11-25 19:51:09,876 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:51:09,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:51:09,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 25 [2021-11-25 19:51:09,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763239356] [2021-11-25 19:51:09,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:51:09,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 19:51:09,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:09,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 19:51:09,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2409, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 19:51:09,877 INFO L87 Difference]: Start difference. First operand 533 states and 614 transitions. Second operand has 27 states, 23 states have (on average 4.608695652173913) internal successors, (106), 23 states have internal predecessors, (106), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:51:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:13,559 INFO L93 Difference]: Finished difference Result 792 states and 898 transitions. [2021-11-25 19:51:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-25 19:51:13,560 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 4.608695652173913) internal successors, (106), 23 states have internal predecessors, (106), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2021-11-25 19:51:13,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:13,567 INFO L225 Difference]: With dead ends: 792 [2021-11-25 19:51:13,567 INFO L226 Difference]: Without dead ends: 792 [2021-11-25 19:51:13,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3466 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1100, Invalid=9612, Unknown=0, NotChecked=0, Total=10712 [2021-11-25 19:51:13,569 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 727 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:13,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 437 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 855 Invalid, 0 Unknown, 110 Unchecked, 0.7s Time] [2021-11-25 19:51:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-11-25 19:51:13,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 289. [2021-11-25 19:51:13,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 268 states have (on average 1.1492537313432836) internal successors, (308), 274 states have internal predecessors, (308), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-25 19:51:13,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 327 transitions. [2021-11-25 19:51:13,581 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 327 transitions. Word has length 58 [2021-11-25 19:51:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:13,582 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 327 transitions. [2021-11-25 19:51:13,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 4.608695652173913) internal successors, (106), 23 states have internal predecessors, (106), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:51:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 327 transitions. [2021-11-25 19:51:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 19:51:13,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:13,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:13,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:13,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:13,797 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:51:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1783899014, now seen corresponding path program 1 times [2021-11-25 19:51:13,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:13,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450362594] [2021-11-25 19:51:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:13,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:51:13,840 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:13,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450362594] [2021-11-25 19:51:13,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450362594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:51:13,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411785718] [2021-11-25 19:51:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:13,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:13,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:13,843 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:51:13,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-25 19:51:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:13,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 19:51:13,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:14,041 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:51:14,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:51:14,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411785718] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:14,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123294152] [2021-11-25 19:51:14,137 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 19:51:14,137 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:51:14,138 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:51:14,138 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:51:14,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:51:14,242 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:51:14,242 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 [2021-11-25 19:51:14,255 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-25 19:51:14,256 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 [2021-11-25 19:51:14,366 INFO L354 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2021-11-25 19:51:14,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2021-11-25 19:51:14,651 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-25 19:51:14,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:14,770 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-25 19:51:14,771 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 [2021-11-25 19:51:14,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:14,791 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-25 19:51:14,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-11-25 19:51:14,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:14,923 INFO L354 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2021-11-25 19:51:14,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2021-11-25 19:51:14,999 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:51:17,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2123294152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:17,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:51:17,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 3, 3] total 21 [2021-11-25 19:51:17,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666827550] [2021-11-25 19:51:17,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:17,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 19:51:17,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:17,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 19:51:17,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:51:17,031 INFO L87 Difference]: Start difference. First operand 289 states and 327 transitions. Second operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:51:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:17,653 INFO L93 Difference]: Finished difference Result 397 states and 446 transitions. [2021-11-25 19:51:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 19:51:17,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2021-11-25 19:51:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:17,655 INFO L225 Difference]: With dead ends: 397 [2021-11-25 19:51:17,655 INFO L226 Difference]: Without dead ends: 397 [2021-11-25 19:51:17,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:51:17,656 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:17,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 141 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:51:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-25 19:51:17,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 380. [2021-11-25 19:51:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 353 states have (on average 1.1444759206798867) internal successors, (404), 361 states have internal predecessors, (404), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-25 19:51:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 431 transitions. [2021-11-25 19:51:17,663 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 431 transitions. Word has length 60 [2021-11-25 19:51:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:17,663 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 431 transitions. [2021-11-25 19:51:17,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:51:17,664 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 431 transitions. [2021-11-25 19:51:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 19:51:17,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:17,665 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:17,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:17,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:17,892 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:51:17,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:17,892 INFO L85 PathProgramCache]: Analyzing trace with hash 635004488, now seen corresponding path program 1 times [2021-11-25 19:51:17,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:17,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431114629] [2021-11-25 19:51:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:17,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:18,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:18,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431114629] [2021-11-25 19:51:18,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431114629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:51:18,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624758893] [2021-11-25 19:51:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:18,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:18,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:18,026 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:51:18,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-25 19:51:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:18,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 19:51:18,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:18,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:51:18,387 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:51:18,388 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 20 treesize of output 21 [2021-11-25 19:51:18,431 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 19:51:18,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:51:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:18,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:18,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624758893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:51:18,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789928956] [2021-11-25 19:51:18,561 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-25 19:51:18,561 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:51:18,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:51:18,562 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:51:18,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:51:18,722 INFO L354 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2021-11-25 19:51:18,722 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 [2021-11-25 19:51:19,141 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-25 19:51:19,141 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 [2021-11-25 19:51:19,319 INFO L354 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2021-11-25 19:51:19,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2021-11-25 19:51:19,341 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 19:51:19,393 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 19:51:19,707 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2021-11-25 19:51:19,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:19,825 INFO L354 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2021-11-25 19:51:19,825 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 [2021-11-25 19:51:20,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:20,068 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-25 19:51:20,069 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 [2021-11-25 19:51:20,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:20,263 INFO L354 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2021-11-25 19:51:20,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2021-11-25 19:51:20,278 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 19:51:20,314 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 19:51:20,348 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-25 19:51:20,411 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:51:24,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44823#(and (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (= (select |#valid| ~global~0.base) 1)) (<= (select (select |#memory_int| |~#commands~0.base|) (+ |~#commands~0.offset| 8 (* |parse_input_~i~0#1| 9))) ~state~0) (= 6 |~#commands~0.base|) (not (= |parse_input_c1_~x~0#1.base| 0)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9) 4)) |parse_input_#t~mem6#1.offset|) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9) 4))) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))))) (< ~global~0.base |#StackHeapBarrier|) (= ~global~0.offset 0) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (not (= (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9))) |parse_input_c1_~x~0#1.base|)) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) 1) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:51:24,540 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:51:24,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:51:24,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-11-25 19:51:24,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602918669] [2021-11-25 19:51:24,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:51:24,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 19:51:24,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:24,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 19:51:24,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:51:24,541 INFO L87 Difference]: Start difference. First operand 380 states and 431 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:51:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:24,680 INFO L93 Difference]: Finished difference Result 397 states and 446 transitions. [2021-11-25 19:51:24,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:51:24,680 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2021-11-25 19:51:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:24,682 INFO L225 Difference]: With dead ends: 397 [2021-11-25 19:51:24,682 INFO L226 Difference]: Without dead ends: 397 [2021-11-25 19:51:24,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 19:51:24,683 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 58 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:24,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 168 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2021-11-25 19:51:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-25 19:51:24,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 382. [2021-11-25 19:51:24,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 355 states have (on average 1.1380281690140845) internal successors, (404), 363 states have internal predecessors, (404), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-25 19:51:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 432 transitions. [2021-11-25 19:51:24,690 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 432 transitions. Word has length 62 [2021-11-25 19:51:24,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:24,690 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 432 transitions. [2021-11-25 19:51:24,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:51:24,691 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 432 transitions. [2021-11-25 19:51:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 19:51:24,691 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:24,691 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:24,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:24,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-25 19:51:24,892 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:51:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:24,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1831591415, now seen corresponding path program 1 times [2021-11-25 19:51:24,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:24,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257654425] [2021-11-25 19:51:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:24,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 19:51:24,922 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 19:51:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 19:51:24,976 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 19:51:24,976 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 19:51:24,977 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2021-11-25 19:51:24,979 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATION (18 of 20 remaining) [2021-11-25 19:51:24,980 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATION (17 of 20 remaining) [2021-11-25 19:51:24,980 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2021-11-25 19:51:24,980 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2021-11-25 19:51:24,980 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2021-11-25 19:51:24,981 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2021-11-25 19:51:24,981 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATION (12 of 20 remaining) [2021-11-25 19:51:24,981 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATION (11 of 20 remaining) [2021-11-25 19:51:24,981 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATION (10 of 20 remaining) [2021-11-25 19:51:24,981 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATION (9 of 20 remaining) [2021-11-25 19:51:24,982 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2021-11-25 19:51:24,982 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2021-11-25 19:51:24,982 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2021-11-25 19:51:24,982 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2021-11-25 19:51:24,983 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2021-11-25 19:51:24,983 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2021-11-25 19:51:24,983 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2021-11-25 19:51:24,983 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2021-11-25 19:51:24,983 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2021-11-25 19:51:24,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-25 19:51:24,987 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:24,991 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:51:25,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:51:25 BoogieIcfgContainer [2021-11-25 19:51:25,090 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:51:25,091 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:51:25,091 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:51:25,091 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:51:25,092 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:46:56" (3/4) ... [2021-11-25 19:51:25,095 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 19:51:25,095 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:51:25,096 INFO L158 Benchmark]: Toolchain (without parser) took 269255.12ms. Allocated memory was 100.7MB in the beginning and 394.3MB in the end (delta: 293.6MB). Free memory was 56.6MB in the beginning and 271.2MB in the end (delta: -214.6MB). Peak memory consumption was 79.0MB. Max. memory is 16.1GB. [2021-11-25 19:51:25,096 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 100.7MB. Free memory was 74.7MB in the beginning and 74.6MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:51:25,096 INFO L158 Benchmark]: CACSL2BoogieTranslator took 557.83ms. Allocated memory is still 100.7MB. Free memory was 56.3MB in the beginning and 63.9MB in the end (delta: -7.5MB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. [2021-11-25 19:51:25,096 INFO L158 Benchmark]: Boogie Procedure Inliner took 86.38ms. Allocated memory is still 100.7MB. Free memory was 63.9MB in the beginning and 61.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:51:25,097 INFO L158 Benchmark]: Boogie Preprocessor took 46.16ms. Allocated memory is still 100.7MB. Free memory was 61.6MB in the beginning and 60.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:51:25,097 INFO L158 Benchmark]: RCFGBuilder took 397.31ms. Allocated memory is still 100.7MB. Free memory was 60.0MB in the beginning and 45.9MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-25 19:51:25,097 INFO L158 Benchmark]: TraceAbstraction took 268156.52ms. Allocated memory was 100.7MB in the beginning and 394.3MB in the end (delta: 293.6MB). Free memory was 45.3MB in the beginning and 271.2MB in the end (delta: -225.9MB). Peak memory consumption was 70.4MB. Max. memory is 16.1GB. [2021-11-25 19:51:25,097 INFO L158 Benchmark]: Witness Printer took 4.32ms. Allocated memory is still 394.3MB. Free memory is still 271.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:51:25,098 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 100.7MB. Free memory was 74.7MB in the beginning and 74.6MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 557.83ms. Allocated memory is still 100.7MB. Free memory was 56.3MB in the beginning and 63.9MB in the end (delta: -7.5MB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 86.38ms. Allocated memory is still 100.7MB. Free memory was 63.9MB in the beginning and 61.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.16ms. Allocated memory is still 100.7MB. Free memory was 61.6MB in the beginning and 60.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 397.31ms. Allocated memory is still 100.7MB. Free memory was 60.0MB in the beginning and 45.9MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 268156.52ms. Allocated memory was 100.7MB in the beginning and 394.3MB in the end (delta: 293.6MB). Free memory was 45.3MB in the beginning and 271.2MB in the end (delta: -225.9MB). Peak memory consumption was 70.4MB. Max. memory is 16.1GB. * Witness Printer took 4.32ms. Allocated memory is still 394.3MB. Free memory is still 271.2MB. 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 FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, 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=1, 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={2:0}, global={0:0}, i=1, 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={2:0}, global={0:0}, i=1, 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={2:0}, global={0:0}, i=1, 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={2:0}, global={0:0}, i=1, 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={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L722] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L723] 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, 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={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, 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={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, 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={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, 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={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, 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={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L723] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L724] CALL parse_input("c2") 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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={5:0}, input={5:0}, 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) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={-3:0}, state=1, x={-3:0}] [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={-3:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={-3:0}, 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: 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. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: 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, 58 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 268.0s, OverallIterations: 47, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 35.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13041 SdHoareTripleChecker+Valid, 11.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13039 mSDsluCounter, 11891 SdHoareTripleChecker+Invalid, 9.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2143 IncrementalHoareTripleChecker+Unchecked, 10026 mSDsCounter, 2027 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12094 IncrementalHoareTripleChecker+Invalid, 16264 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2027 mSolverCounterUnsat, 2129 mSDtfsCounter, 12094 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4815 GetRequests, 3007 SyntacticMatches, 158 SemanticMatches, 1650 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32473 ImplicationChecksByTransitivity, 167.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=595occurred in iteration=21, InterpolantAutomatonStates: 725, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 46 MinimizatonAttempts, 3153 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 31.2s InterpolantComputationTime, 3412 NumberOfCodeBlocks, 3396 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 3875 ConstructedInterpolants, 288 QuantifiedInterpolants, 45871 SizeOfPredicates, 184 NumberOfNonLiveVariables, 10052 ConjunctsInSsa, 774 ConjunctsInUnsatCore, 97 InterpolantComputations, 13 PerfectInterpolantSequences, 1299/2724 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: 6.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 87, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 187, TOOLS_POST_TIME: 5.0s, TOOLS_POST_CALL_APPLICATIONS: 16, TOOLS_POST_CALL_TIME: 0.3s, TOOLS_POST_RETURN_APPLICATIONS: 8, TOOLS_POST_RETURN_TIME: 0.4s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 211, TOOLS_QUANTIFIERELIM_TIME: 5.6s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.6s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 320, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 21, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 3, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 87, DOMAIN_ISBOTTOM_TIME: 0.2s, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME: 1.4s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.4s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 8, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 1.3s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 1.3s, 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: 1085, DAG_COMPRESSION_RETAINED_NODES: 238, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-25 19:51:25,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/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_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:51:27,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:51:27,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:51:27,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:51:27,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:51:27,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:51:27,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:51:27,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:51:27,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:51:27,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:51:27,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:51:27,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:51:27,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:51:27,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:51:27,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:51:27,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:51:27,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:51:27,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:51:27,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:51:27,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:51:27,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:51:27,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:51:27,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:51:27,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:51:27,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:51:27,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:51:27,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:51:27,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:51:27,871 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:51:27,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:51:27,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:51:27,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:51:27,877 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:51:27,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:51:27,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:51:27,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:51:27,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:51:27,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:51:27,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:51:27,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:51:27,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:51:27,889 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 19:51:27,942 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:51:27,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:51:27,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:51:27,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:51:27,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:51:27,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:51:27,945 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:51:27,945 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:51:27,946 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:51:27,946 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:51:27,947 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:51:27,947 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:51:27,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:51:27,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:51:27,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:51:27,950 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:51:27,950 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:51:27,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:51:27,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:51:27,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:51:27,951 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:51:27,951 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:51:27,952 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:51:27,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:51:27,952 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:51:27,952 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 19:51:27,953 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 19:51:27,953 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:51:27,953 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:51:27,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:51:27,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 19:51:27,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:51:27,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:51:27,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:51:27,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:51:27,956 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 19:51:27,956 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 19:51:27,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:51:27,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:51:27,957 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_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2021-11-25 19:51:28,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:51:28,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:51:28,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:51:28,395 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:51:28,395 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:51:28,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-11-25 19:51:28,478 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/data/0cae18606/e68b989ebeb94574bb03f0cda1c00898/FLAG47bab3ced [2021-11-25 19:51:29,130 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:51:29,136 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-11-25 19:51:29,158 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/data/0cae18606/e68b989ebeb94574bb03f0cda1c00898/FLAG47bab3ced [2021-11-25 19:51:29,403 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/data/0cae18606/e68b989ebeb94574bb03f0cda1c00898 [2021-11-25 19:51:29,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:51:29,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:51:29,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:51:29,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:51:29,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:51:29,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:51:29" (1/1) ... [2021-11-25 19:51:29,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c7c376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:51:29, skipping insertion in model container [2021-11-25 19:51:29,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:51:29" (1/1) ... [2021-11-25 19:51:29,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:51:29,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:51:29,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:51:29,937 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:51:30,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:51:30,073 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:51:30,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:51:30 WrapperNode [2021-11-25 19:51:30,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:51:30,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:51:30,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:51:30,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:51:30,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:51:30" (1/1) ... [2021-11-25 19:51:30,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:51:30" (1/1) ... [2021-11-25 19:51:30,135 INFO L137 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2021-11-25 19:51:30,136 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:51:30,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:51:30,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:51:30,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:51:30,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:51:30" (1/1) ... [2021-11-25 19:51:30,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:51:30" (1/1) ... [2021-11-25 19:51:30,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:51:30" (1/1) ... [2021-11-25 19:51:30,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:51:30" (1/1) ... [2021-11-25 19:51:30,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:51:30" (1/1) ... [2021-11-25 19:51:30,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:51:30" (1/1) ... [2021-11-25 19:51:30,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:51:30" (1/1) ... [2021-11-25 19:51:30,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:51:30,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:51:30,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:51:30,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:51:30,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:51:30" (1/1) ... [2021-11-25 19:51:30,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:51:30,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:30,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:51:30,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:51:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-25 19:51:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-11-25 19:51:30,266 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-11-25 19:51:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:51:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:51:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:51:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:51:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:51:30,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 19:51:30,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:51:30,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:51:30,389 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:51:30,391 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:51:30,721 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:51:30,741 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:51:30,742 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:51:30,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:51:30 BoogieIcfgContainer [2021-11-25 19:51:30,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:51:30,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:51:30,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:51:30,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:51:30,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:51:29" (1/3) ... [2021-11-25 19:51:30,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51002fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:51:30, skipping insertion in model container [2021-11-25 19:51:30,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:51:30" (2/3) ... [2021-11-25 19:51:30,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51002fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:51:30, skipping insertion in model container [2021-11-25 19:51:30,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:51:30" (3/3) ... [2021-11-25 19:51:30,760 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2021-11-25 19:51:30,767 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:51:30,767 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-25 19:51:30,834 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:51:30,858 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:51:30,861 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-25 19:51:30,883 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) [2021-11-25 19:51:30,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:51:30,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:30,894 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:51:30,895 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)] === [2021-11-25 19:51:30,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:30,902 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2021-11-25 19:51:30,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:30,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202263125] [2021-11-25 19:51:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:30,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:30,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:30,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:30,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:51:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:31,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:51:31,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:31,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:51:31,343 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:31,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202263125] [2021-11-25 19:51:31,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202263125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:31,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:31,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 19:51:31,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080719522] [2021-11-25 19:51:31,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:31,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:51:31,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:31,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:51:31,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:51:31,405 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 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-25 19:51:31,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:31,681 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2021-11-25 19:51:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:51:31,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2021-11-25 19:51:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:31,706 INFO L225 Difference]: With dead ends: 110 [2021-11-25 19:51:31,706 INFO L226 Difference]: Without dead ends: 106 [2021-11-25 19:51:31,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:51:31,712 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:31,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:51:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-25 19:51:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-11-25 19:51:31,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 76 states have internal predecessors, (97), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 19:51:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2021-11-25 19:51:31,803 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 6 [2021-11-25 19:51:31,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:31,803 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2021-11-25 19:51:31,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-11-25 19:51:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2021-11-25 19:51:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:51:31,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:31,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:51:31,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:32,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:32,019 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)] === [2021-11-25 19:51:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2021-11-25 19:51:32,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:32,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494012805] [2021-11-25 19:51:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:32,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:32,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:32,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:32,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:51:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:32,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:51:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:32,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:51:32,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:32,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494012805] [2021-11-25 19:51:32,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494012805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:32,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:32,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:51:32,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132017256] [2021-11-25 19:51:32,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:32,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:51:32,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:51:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:51:32,248 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2021-11-25 19:51:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:32,587 INFO L93 Difference]: Finished difference Result 206 states and 278 transitions. [2021-11-25 19:51:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:51:32,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 [2021-11-25 19:51:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:32,592 INFO L225 Difference]: With dead ends: 206 [2021-11-25 19:51:32,592 INFO L226 Difference]: Without dead ends: 206 [2021-11-25 19:51:32,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:51:32,594 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 125 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:32,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 142 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:51:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-25 19:51:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2021-11-25 19:51:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 119 states have (on average 1.7394957983193278) internal successors, (207), 138 states have internal predecessors, (207), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-25 19:51:32,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 238 transitions. [2021-11-25 19:51:32,641 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 238 transitions. Word has length 6 [2021-11-25 19:51:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:32,641 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 238 transitions. [2021-11-25 19:51:32,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2021-11-25 19:51:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 238 transitions. [2021-11-25 19:51:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:51:32,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:32,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:32,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:32,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:32,843 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)] === [2021-11-25 19:51:32,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2021-11-25 19:51:32,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:32,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972014414] [2021-11-25 19:51:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:32,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:32,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:32,846 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:32,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 19:51:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:32,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:51:32,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:33,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:51:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:33,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:51:33,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:33,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972014414] [2021-11-25 19:51:33,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972014414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:33,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:33,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:51:33,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49507734] [2021-11-25 19:51:33,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:33,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:51:33,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:33,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:51:33,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:51:33,153 INFO L87 Difference]: Start difference. First operand 152 states and 238 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) [2021-11-25 19:51:33,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:33,558 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2021-11-25 19:51:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:51:33,560 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 [2021-11-25 19:51:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:33,564 INFO L225 Difference]: With dead ends: 228 [2021-11-25 19:51:33,564 INFO L226 Difference]: Without dead ends: 228 [2021-11-25 19:51:33,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:51:33,566 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 136 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:33,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 164 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 19:51:33,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-25 19:51:33,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-11-25 19:51:33,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.721311475409836) internal successors, (210), 141 states have internal predecessors, (210), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-25 19:51:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 241 transitions. [2021-11-25 19:51:33,626 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 241 transitions. Word has length 7 [2021-11-25 19:51:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:33,626 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 241 transitions. [2021-11-25 19:51:33,626 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) [2021-11-25 19:51:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 241 transitions. [2021-11-25 19:51:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:51:33,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:33,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:33,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:33,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:33,828 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)] === [2021-11-25 19:51:33,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:33,829 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2021-11-25 19:51:33,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:33,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995189165] [2021-11-25 19:51:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:33,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:33,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:33,832 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:33,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 19:51:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:33,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:51:33,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:34,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:51:34,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:51:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:34,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:51:34,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:34,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995189165] [2021-11-25 19:51:34,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995189165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:34,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:34,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:51:34,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819286579] [2021-11-25 19:51:34,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:34,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:51:34,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:34,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:51:34,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:51:34,130 INFO L87 Difference]: Start difference. First operand 155 states and 241 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:51:34,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:34,460 INFO L93 Difference]: Finished difference Result 208 states and 279 transitions. [2021-11-25 19:51:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:51:34,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 19:51:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:34,464 INFO L225 Difference]: With dead ends: 208 [2021-11-25 19:51:34,464 INFO L226 Difference]: Without dead ends: 208 [2021-11-25 19:51:34,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:51:34,466 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 128 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:34,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 190 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:51:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-25 19:51:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2021-11-25 19:51:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 141 states have internal predecessors, (208), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-25 19:51:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 239 transitions. [2021-11-25 19:51:34,488 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 239 transitions. Word has length 8 [2021-11-25 19:51:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:34,488 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 239 transitions. [2021-11-25 19:51:34,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:51:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 239 transitions. [2021-11-25 19:51:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:51:34,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:34,490 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:34,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:34,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:34,702 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)] === [2021-11-25 19:51:34,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:34,703 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2021-11-25 19:51:34,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:34,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742408819] [2021-11-25 19:51:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:34,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:34,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:34,706 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:34,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 19:51:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:34,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:51:34,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:34,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:51:34,875 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:34,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742408819] [2021-11-25 19:51:34,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742408819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:34,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:34,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:51:34,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294715006] [2021-11-25 19:51:34,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:34,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:51:34,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:34,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:51:34,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:51:34,878 INFO L87 Difference]: Start difference. First operand 155 states and 239 transitions. Second operand has 5 states, 4 states have (on average 2.0) 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) [2021-11-25 19:51:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:35,101 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2021-11-25 19:51:35,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:51:35,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) 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 [2021-11-25 19:51:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:35,104 INFO L225 Difference]: With dead ends: 234 [2021-11-25 19:51:35,104 INFO L226 Difference]: Without dead ends: 234 [2021-11-25 19:51:35,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:51:35,106 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 140 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:35,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 183 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:51:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-25 19:51:35,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2021-11-25 19:51:35,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 156 states have (on average 1.6538461538461537) internal successors, (258), 176 states have internal predecessors, (258), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-25 19:51:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2021-11-25 19:51:35,124 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 9 [2021-11-25 19:51:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:35,124 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2021-11-25 19:51:35,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) 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) [2021-11-25 19:51:35,125 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2021-11-25 19:51:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:51:35,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:35,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:35,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:35,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:35,339 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)] === [2021-11-25 19:51:35,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:35,339 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2021-11-25 19:51:35,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:35,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132108594] [2021-11-25 19:51:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:35,340 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:35,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:35,342 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:35,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 19:51:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:35,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:51:35,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:35,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:51:35,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:35,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132108594] [2021-11-25 19:51:35,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132108594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:35,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:35,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:51:35,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698926683] [2021-11-25 19:51:35,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:35,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:51:35,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:35,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:51:35,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:51:35,565 INFO L87 Difference]: Start difference. First operand 191 states and 289 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:51:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:35,860 INFO L93 Difference]: Finished difference Result 231 states and 304 transitions. [2021-11-25 19:51:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:51:35,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 19:51:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:35,866 INFO L225 Difference]: With dead ends: 231 [2021-11-25 19:51:35,866 INFO L226 Difference]: Without dead ends: 231 [2021-11-25 19:51:35,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:51:35,867 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:35,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 227 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:51:35,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-25 19:51:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2021-11-25 19:51:35,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 186 states have internal predecessors, (271), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-25 19:51:35,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 302 transitions. [2021-11-25 19:51:35,890 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 302 transitions. Word has length 10 [2021-11-25 19:51:35,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:35,891 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 302 transitions. [2021-11-25 19:51:35,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:51:35,891 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 302 transitions. [2021-11-25 19:51:35,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:51:35,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:35,892 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:35,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:36,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:36,107 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)] === [2021-11-25 19:51:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:36,108 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2021-11-25 19:51:36,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:36,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141790574] [2021-11-25 19:51:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:36,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:36,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:36,110 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:36,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 19:51:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:36,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:51:36,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:36,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:37,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141790574] [2021-11-25 19:51:37,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141790574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1443953464] [2021-11-25 19:51:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:37,159 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:51:37,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:51:37,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:51:37,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-25 19:51:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:37,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:51:37,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:37,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:37,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1443953464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:37,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350760289] [2021-11-25 19:51:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:37,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:37,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:37,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:51:37,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:51:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:37,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:51:37,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:38,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:38,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350760289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:38,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:51:38,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2021-11-25 19:51:38,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466246888] [2021-11-25 19:51:38,559 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:51:38,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:51:38,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:38,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:51:38,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:51:38,561 INFO L87 Difference]: Start difference. First operand 201 states and 302 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-11-25 19:51:39,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:39,290 INFO L93 Difference]: Finished difference Result 367 states and 495 transitions. [2021-11-25 19:51:39,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:51:39,291 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 14 [2021-11-25 19:51:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:39,294 INFO L225 Difference]: With dead ends: 367 [2021-11-25 19:51:39,294 INFO L226 Difference]: Without dead ends: 367 [2021-11-25 19:51:39,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:51:39,295 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 258 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:39,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 312 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:51:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-25 19:51:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 239. [2021-11-25 19:51:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 200 states have (on average 1.62) internal successors, (324), 224 states have internal predecessors, (324), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-11-25 19:51:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 363 transitions. [2021-11-25 19:51:39,312 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 363 transitions. Word has length 14 [2021-11-25 19:51:39,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:39,313 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 363 transitions. [2021-11-25 19:51:39,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2021-11-25 19:51:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 363 transitions. [2021-11-25 19:51:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:51:39,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:39,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:39,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:39,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-25 19:51:39,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:39,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:39,927 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)] === [2021-11-25 19:51:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:39,928 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2021-11-25 19:51:39,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:39,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801387355] [2021-11-25 19:51:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:39,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:39,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:39,929 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:39,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 19:51:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:39,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 19:51:40,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:40,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:51:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:40,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:40,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:40,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801387355] [2021-11-25 19:51:40,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801387355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:40,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412550558] [2021-11-25 19:51:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:40,521 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:51:40,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:51:40,522 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:51:40,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-25 19:51:40,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:40,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:51:40,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:41,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:51:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:41,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:41,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [412550558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:41,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800596998] [2021-11-25 19:51:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:41,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:41,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:41,252 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:51:41,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:51:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:41,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:51:41,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:41,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:51:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:41,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:42,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800596998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:42,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:51:42,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 18 [2021-11-25 19:51:42,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612939241] [2021-11-25 19:51:42,388 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:51:42,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 19:51:42,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:42,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 19:51:42,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:51:42,390 INFO L87 Difference]: Start difference. First operand 239 states and 363 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) [2021-11-25 19:51:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:44,908 INFO L93 Difference]: Finished difference Result 601 states and 793 transitions. [2021-11-25 19:51:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 19:51:44,909 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 [2021-11-25 19:51:44,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:44,913 INFO L225 Difference]: With dead ends: 601 [2021-11-25 19:51:44,913 INFO L226 Difference]: Without dead ends: 601 [2021-11-25 19:51:44,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:51:44,915 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 1335 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:44,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1335 Valid, 506 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 19:51:44,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-11-25 19:51:44,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 307. [2021-11-25 19:51:44,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 267 states have (on average 1.6254681647940075) internal successors, (434), 292 states have internal predecessors, (434), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2021-11-25 19:51:44,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 475 transitions. [2021-11-25 19:51:44,949 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 475 transitions. Word has length 15 [2021-11-25 19:51:44,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:44,950 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 475 transitions. [2021-11-25 19:51:44,950 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) [2021-11-25 19:51:44,950 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 475 transitions. [2021-11-25 19:51:44,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 19:51:44,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:44,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:44,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:45,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:45,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:45,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:45,564 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:51:45,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:45,565 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2021-11-25 19:51:45,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:45,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164054680] [2021-11-25 19:51:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:45,566 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:45,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:45,567 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:45,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 19:51:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:45,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:51:45,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:46,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:51:46,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:51:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:46,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:46,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:46,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164054680] [2021-11-25 19:51:46,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164054680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:46,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1724540516] [2021-11-25 19:51:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:46,233 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:51:46,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:51:46,246 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:51:46,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-25 19:51:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:46,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:51:46,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:46,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:51:46,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:51:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:46,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:46,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1724540516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:46,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933892266] [2021-11-25 19:51:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:46,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:46,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:46,834 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:51:46,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:51:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:46,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:51:46,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:47,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:51:47,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:51:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:47,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:47,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933892266] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:47,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:51:47,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2021-11-25 19:51:47,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179318619] [2021-11-25 19:51:47,964 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:51:47,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 19:51:47,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:47,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 19:51:47,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:51:47,965 INFO L87 Difference]: Start difference. First operand 307 states and 475 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) [2021-11-25 19:51:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:50,855 INFO L93 Difference]: Finished difference Result 830 states and 1133 transitions. [2021-11-25 19:51:50,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 19:51:50,856 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 [2021-11-25 19:51:50,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:50,862 INFO L225 Difference]: With dead ends: 830 [2021-11-25 19:51:50,862 INFO L226 Difference]: Without dead ends: 830 [2021-11-25 19:51:50,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-11-25 19:51:50,864 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 1139 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:50,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1139 Valid, 628 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-25 19:51:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-11-25 19:51:50,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 422. [2021-11-25 19:51:50,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 375 states have (on average 1.6426666666666667) internal successors, (616), 403 states have internal predecessors, (616), 11 states have call successors, (11), 7 states have call predecessors, (11), 16 states have return successors, (48), 11 states have call predecessors, (48), 11 states have call successors, (48) [2021-11-25 19:51:50,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 675 transitions. [2021-11-25 19:51:50,893 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 675 transitions. Word has length 16 [2021-11-25 19:51:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:50,894 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 675 transitions. [2021-11-25 19:51:50,894 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) [2021-11-25 19:51:50,894 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 675 transitions. [2021-11-25 19:51:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:51:50,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:50,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:50,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:51,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:51,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:51,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:51:51,512 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:51:51,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:51,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2021-11-25 19:51:51,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:51,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427451083] [2021-11-25 19:51:51,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:51,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:51,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:51,514 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:51,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 19:51:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:51,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:51:51,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:51,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:51:51,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:51,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427451083] [2021-11-25 19:51:51,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427451083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:51,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:51,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:51:51,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993098014] [2021-11-25 19:51:51,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:51,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:51:51,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:51,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:51:51,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:51:51,697 INFO L87 Difference]: Start difference. First operand 422 states and 675 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) [2021-11-25 19:51:51,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:51,734 INFO L93 Difference]: Finished difference Result 420 states and 622 transitions. [2021-11-25 19:51:51,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:51:51,735 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 [2021-11-25 19:51:51,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:51,738 INFO L225 Difference]: With dead ends: 420 [2021-11-25 19:51:51,738 INFO L226 Difference]: Without dead ends: 420 [2021-11-25 19:51:51,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:51:51,739 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 27 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:51,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 118 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:51:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-25 19:51:51,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 397. [2021-11-25 19:51:51,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 350 states have (on average 1.5742857142857143) internal successors, (551), 377 states have internal predecessors, (551), 11 states have call successors, (11), 8 states have call predecessors, (11), 16 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2021-11-25 19:51:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 603 transitions. [2021-11-25 19:51:51,757 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 603 transitions. Word has length 18 [2021-11-25 19:51:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:51,758 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 603 transitions. [2021-11-25 19:51:51,758 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) [2021-11-25 19:51:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 603 transitions. [2021-11-25 19:51:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:51:51,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:51,760 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 19:51:51,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:51,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:51,981 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:51:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:51,982 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 2 times [2021-11-25 19:51:51,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:51,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035669633] [2021-11-25 19:51:51,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:51:51,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:51,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:51,983 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:51,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 19:51:52,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:51:52,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:51:52,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:51:52,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:52,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:53,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:53,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035669633] [2021-11-25 19:51:53,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035669633] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:53,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [789226493] [2021-11-25 19:51:53,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:51:53,487 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:51:53,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:51:53,492 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:51:53,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-25 19:51:53,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:51:53,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:51:53,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:51:53,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:53,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:53,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [789226493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:53,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887518145] [2021-11-25 19:51:53,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:51:53,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:53,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:53,985 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:51:53,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-25 19:51:54,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:51:54,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:51:54,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:51:54,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:54,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:54,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887518145] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:54,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:51:54,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 16 [2021-11-25 19:51:54,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631305035] [2021-11-25 19:51:54,202 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:51:54,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 19:51:54,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:54,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 19:51:54,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:51:54,203 INFO L87 Difference]: Start difference. First operand 397 states and 603 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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) [2021-11-25 19:51:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:55,142 INFO L93 Difference]: Finished difference Result 495 states and 681 transitions. [2021-11-25 19:51:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:51:55,143 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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 22 [2021-11-25 19:51:55,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:55,147 INFO L225 Difference]: With dead ends: 495 [2021-11-25 19:51:55,147 INFO L226 Difference]: Without dead ends: 495 [2021-11-25 19:51:55,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:51:55,149 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 512 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:55,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 484 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 19:51:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-25 19:51:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 336. [2021-11-25 19:51:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 288 states have (on average 1.5104166666666667) internal successors, (435), 316 states have internal predecessors, (435), 11 states have call successors, (11), 8 states have call predecessors, (11), 17 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2021-11-25 19:51:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 482 transitions. [2021-11-25 19:51:55,169 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 482 transitions. Word has length 22 [2021-11-25 19:51:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:55,170 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 482 transitions. [2021-11-25 19:51:55,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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) [2021-11-25 19:51:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 482 transitions. [2021-11-25 19:51:55,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 19:51:55,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:55,172 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] [2021-11-25 19:51:55,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:55,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-25 19:51:55,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:55,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:51:55,784 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)] === [2021-11-25 19:51:55,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:55,785 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2021-11-25 19:51:55,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:55,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041050550] [2021-11-25 19:51:55,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:55,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:55,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:55,787 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:55,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-25 19:51:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:55,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:51:55,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:55,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:51:55,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:55,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041050550] [2021-11-25 19:51:55,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041050550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:51:55,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:51:55,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:51:55,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288109400] [2021-11-25 19:51:55,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:51:55,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:51:55,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:51:55,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:51:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:51:55,903 INFO L87 Difference]: Start difference. First operand 336 states and 482 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) [2021-11-25 19:51:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:55,908 INFO L93 Difference]: Finished difference Result 259 states and 362 transitions. [2021-11-25 19:51:55,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:51:55,909 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 [2021-11-25 19:51:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:55,911 INFO L225 Difference]: With dead ends: 259 [2021-11-25 19:51:55,911 INFO L226 Difference]: Without dead ends: 259 [2021-11-25 19:51:55,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:51:55,913 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 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 [2021-11-25 19:51:55,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:51:55,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-11-25 19:51:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2021-11-25 19:51:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 219 states have (on average 1.5068493150684932) internal successors, (330), 244 states have internal predecessors, (330), 8 states have call successors, (8), 6 states have call predecessors, (8), 12 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-11-25 19:51:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 362 transitions. [2021-11-25 19:51:55,925 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 362 transitions. Word has length 25 [2021-11-25 19:51:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:55,925 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 362 transitions. [2021-11-25 19:51:55,925 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) [2021-11-25 19:51:55,925 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 362 transitions. [2021-11-25 19:51:55,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 19:51:55,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:55,927 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:55,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:56,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:51:56,140 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)] === [2021-11-25 19:51:56,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:56,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2021-11-25 19:51:56,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:51:56,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640848533] [2021-11-25 19:51:56,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:56,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:51:56,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:51:56,143 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:51:56,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 19:51:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:56,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:51:56,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:58,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:58,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:51:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:51:58,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:59,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:51:59,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640848533] [2021-11-25 19:51:59,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640848533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:51:59,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1062057099] [2021-11-25 19:51:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:59,490 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:51:59,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:51:59,496 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:51:59,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-25 19:51:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:51:59,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:51:59,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:02,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:52:02,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:52:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:02,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:02,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1062057099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:52:02,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159607546] [2021-11-25 19:52:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:02,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:52:02,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:52:02,608 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:52:02,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 19:52:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:02,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:52:02,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:05,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:52:05,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:52:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:05,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:05,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159607546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:52:05,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:52:05,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2021-11-25 19:52:05,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687801031] [2021-11-25 19:52:05,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:52:05,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:52:05,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:52:05,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:52:05,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2021-11-25 19:52:05,521 INFO L87 Difference]: Start difference. First operand 259 states and 362 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:52:10,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:10,159 INFO L93 Difference]: Finished difference Result 430 states and 547 transitions. [2021-11-25 19:52:10,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:52:10,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-25 19:52:10,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:10,163 INFO L225 Difference]: With dead ends: 430 [2021-11-25 19:52:10,163 INFO L226 Difference]: Without dead ends: 430 [2021-11-25 19:52:10,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=74, Invalid=163, Unknown=3, NotChecked=0, Total=240 [2021-11-25 19:52:10,164 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 204 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:10,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 237 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 145 Invalid, 0 Unknown, 46 Unchecked, 0.4s Time] [2021-11-25 19:52:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-25 19:52:10,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 311. [2021-11-25 19:52:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 268 states have (on average 1.4738805970149254) internal successors, (395), 294 states have internal predecessors, (395), 9 states have call successors, (9), 7 states have call predecessors, (9), 14 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2021-11-25 19:52:10,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 431 transitions. [2021-11-25 19:52:10,177 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 431 transitions. Word has length 27 [2021-11-25 19:52:10,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:10,177 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 431 transitions. [2021-11-25 19:52:10,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:52:10,178 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 431 transitions. [2021-11-25 19:52:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:52:10,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:10,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:10,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-25 19:52:10,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-25 19:52:10,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 19:52:10,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:52:10,796 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:52:10,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:10,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2021-11-25 19:52:10,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:52:10,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [948597387] [2021-11-25 19:52:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:10,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:52:10,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:52:10,798 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:52:10,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-25 19:52:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:52:10,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:11,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:11,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:52:11,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [948597387] [2021-11-25 19:52:11,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [948597387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:52:11,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1257091550] [2021-11-25 19:52:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:11,248 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:52:11,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:52:11,260 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:52:11,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-25 19:52:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:11,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 19:52:11,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:11,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:11,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1257091550] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:52:11,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824804065] [2021-11-25 19:52:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:11,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:52:11,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:52:11,789 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:52:11,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-25 19:52:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:11,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:52:11,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:11,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:12,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824804065] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:52:12,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:52:12,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2021-11-25 19:52:12,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260564627] [2021-11-25 19:52:12,172 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:52:12,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:52:12,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:52:12,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:52:12,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:52:12,174 INFO L87 Difference]: Start difference. First operand 311 states and 431 transitions. Second operand has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 8 states have internal predecessors, (56), 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) [2021-11-25 19:52:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:12,815 INFO L93 Difference]: Finished difference Result 446 states and 560 transitions. [2021-11-25 19:52:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 19:52:12,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 8 states have internal predecessors, (56), 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 28 [2021-11-25 19:52:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:12,818 INFO L225 Difference]: With dead ends: 446 [2021-11-25 19:52:12,818 INFO L226 Difference]: Without dead ends: 446 [2021-11-25 19:52:12,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:52:12,819 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 416 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:12,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 364 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:52:12,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-25 19:52:12,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 384. [2021-11-25 19:52:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 339 states have (on average 1.4041297935103245) internal successors, (476), 365 states have internal predecessors, (476), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2021-11-25 19:52:12,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 510 transitions. [2021-11-25 19:52:12,834 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 510 transitions. Word has length 28 [2021-11-25 19:52:12,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:12,834 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 510 transitions. [2021-11-25 19:52:12,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 8 states have internal predecessors, (56), 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) [2021-11-25 19:52:12,835 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 510 transitions. [2021-11-25 19:52:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:52:12,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:12,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:12,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-25 19:52:13,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-25 19:52:13,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-25 19:52:13,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:52:13,460 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:52:13,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:13,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1128469823, now seen corresponding path program 1 times [2021-11-25 19:52:13,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:52:13,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772950330] [2021-11-25 19:52:13,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:13,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:52:13,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:52:13,463 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:52:13,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-25 19:52:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:13,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:52:13,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:13,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:13,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:52:13,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772950330] [2021-11-25 19:52:13,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772950330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:52:13,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [807923553] [2021-11-25 19:52:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:13,922 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:52:13,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:52:13,923 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:52:13,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-25 19:52:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:14,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:52:14,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:14,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:52:14,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [807923553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:52:14,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:52:14,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 13 [2021-11-25 19:52:14,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300889390] [2021-11-25 19:52:14,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:52:14,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:52:14,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:52:14,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:52:14,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:52:14,311 INFO L87 Difference]: Start difference. First operand 384 states and 510 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:52:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:14,555 INFO L93 Difference]: Finished difference Result 484 states and 616 transitions. [2021-11-25 19:52:14,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:52:14,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 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 29 [2021-11-25 19:52:14,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:14,559 INFO L225 Difference]: With dead ends: 484 [2021-11-25 19:52:14,559 INFO L226 Difference]: Without dead ends: 484 [2021-11-25 19:52:14,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:52:14,561 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 126 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:14,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 194 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:52:14,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-25 19:52:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 405. [2021-11-25 19:52:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 360 states have (on average 1.3888888888888888) internal successors, (500), 386 states have internal predecessors, (500), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2021-11-25 19:52:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 534 transitions. [2021-11-25 19:52:14,577 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 534 transitions. Word has length 29 [2021-11-25 19:52:14,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:14,577 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 534 transitions. [2021-11-25 19:52:14,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:52:14,578 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 534 transitions. [2021-11-25 19:52:14,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:52:14,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:14,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:14,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-25 19:52:14,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-25 19:52:14,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:52:14,992 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)] === [2021-11-25 19:52:14,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:14,992 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2021-11-25 19:52:14,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:52:14,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337714127] [2021-11-25 19:52:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:14,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:52:14,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:52:14,995 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:52:15,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-25 19:52:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:15,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:52:15,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:17,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:52:17,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:52:17,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:52:17,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:52:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:17,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:20,151 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:52:20,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337714127] [2021-11-25 19:52:20,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337714127] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:52:20,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [983387604] [2021-11-25 19:52:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:20,152 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:52:20,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:52:20,166 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:52:20,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-25 19:52:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:20,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:52:20,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:25,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:52:25,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:52:25,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:52:25,133 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 [2021-11-25 19:52:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:25,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:27,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [983387604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:52:27,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959878460] [2021-11-25 19:52:27,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:27,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:52:27,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:52:27,397 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:52:27,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-25 19:52:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:27,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:52:27,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:29,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:52:29,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:52:30,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:52:30,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:52:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:30,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:32,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959878460] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:52:32,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:52:32,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 7 [2021-11-25 19:52:32,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921341139] [2021-11-25 19:52:32,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:52:32,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:52:32,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:52:32,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:52:32,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2021-11-25 19:52:32,299 INFO L87 Difference]: Start difference. First operand 405 states and 534 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:52:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:39,044 INFO L93 Difference]: Finished difference Result 487 states and 601 transitions. [2021-11-25 19:52:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:52:39,045 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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 29 [2021-11-25 19:52:39,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:39,047 INFO L225 Difference]: With dead ends: 487 [2021-11-25 19:52:39,047 INFO L226 Difference]: Without dead ends: 487 [2021-11-25 19:52:39,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2021-11-25 19:52:39,049 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 250 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:39,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 275 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 188 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2021-11-25 19:52:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-11-25 19:52:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 405. [2021-11-25 19:52:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 360 states have (on average 1.3805555555555555) internal successors, (497), 386 states have internal predecessors, (497), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2021-11-25 19:52:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 531 transitions. [2021-11-25 19:52:39,065 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 531 transitions. Word has length 29 [2021-11-25 19:52:39,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:39,065 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 531 transitions. [2021-11-25 19:52:39,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:52:39,066 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 531 transitions. [2021-11-25 19:52:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 19:52:39,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:39,067 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:52:39,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-25 19:52:39,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-25 19:52:39,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-25 19:52:39,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:52:39,681 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)] === [2021-11-25 19:52:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2021-11-25 19:52:39,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:52:39,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100707244] [2021-11-25 19:52:39,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:39,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:52:39,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:52:39,683 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:52:39,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-25 19:52:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:39,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:52:39,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:52:40,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:52:40,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:52:40,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100707244] [2021-11-25 19:52:40,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100707244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:52:40,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1120553220] [2021-11-25 19:52:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:40,398 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:52:40,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:52:40,404 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:52:40,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-25 19:52:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:40,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:52:40,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:52:40,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:52:40,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1120553220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:52:40,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467678874] [2021-11-25 19:52:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:40,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:52:40,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:52:40,965 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:52:40,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-25 19:52:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:41,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:52:41,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:52:41,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:52:41,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467678874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:52:41,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:52:41,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2021-11-25 19:52:41,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560283587] [2021-11-25 19:52:41,400 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:52:41,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:52:41,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:52:41,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:52:41,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:52:41,402 INFO L87 Difference]: Start difference. First operand 405 states and 531 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) [2021-11-25 19:52:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:52:42,192 INFO L93 Difference]: Finished difference Result 444 states and 550 transitions. [2021-11-25 19:52:42,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:52:42,193 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 [2021-11-25 19:52:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:52:42,196 INFO L225 Difference]: With dead ends: 444 [2021-11-25 19:52:42,197 INFO L226 Difference]: Without dead ends: 444 [2021-11-25 19:52:42,197 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 [2021-11-25 19:52:42,199 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 379 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:52:42,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 311 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:52:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-25 19:52:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 415. [2021-11-25 19:52:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 369 states have (on average 1.3604336043360434) internal successors, (502), 396 states have internal predecessors, (502), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (25), 9 states have call predecessors, (25), 9 states have call successors, (25) [2021-11-25 19:52:42,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 536 transitions. [2021-11-25 19:52:42,213 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 536 transitions. Word has length 31 [2021-11-25 19:52:42,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:52:42,214 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 536 transitions. [2021-11-25 19:52:42,214 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) [2021-11-25 19:52:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 536 transitions. [2021-11-25 19:52:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 19:52:42,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:52:42,216 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] [2021-11-25 19:52:42,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-25 19:52:42,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-25 19:52:42,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-25 19:52:42,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:52:42,819 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:52:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:52:42,819 INFO L85 PathProgramCache]: Analyzing trace with hash -117381739, now seen corresponding path program 1 times [2021-11-25 19:52:42,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:52:42,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720676227] [2021-11-25 19:52:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:42,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:52:42,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:52:42,821 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:52:42,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-25 19:52:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:42,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:52:42,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:45,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:52:45,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:52:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:45,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:46,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:52:46,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720676227] [2021-11-25 19:52:46,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720676227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:52:46,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [182511869] [2021-11-25 19:52:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:46,863 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:52:46,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:52:46,864 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:52:46,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-25 19:52:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:47,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:52:47,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:49,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:52:49,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:52:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:49,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:52,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [182511869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:52:52,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020670305] [2021-11-25 19:52:52,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:52:52,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:52:52,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:52:52,333 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:52:52,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-25 19:52:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:52:52,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:52:52,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:52:54,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:52:54,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:52:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:52:55,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:52:57,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020670305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:52:57,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:52:57,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2021-11-25 19:52:57,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752653291] [2021-11-25 19:52:57,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:52:57,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:52:57,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:52:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:52:57,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2021-11-25 19:52:57,781 INFO L87 Difference]: Start difference. First operand 415 states and 536 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:53:02,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:02,425 INFO L93 Difference]: Finished difference Result 496 states and 612 transitions. [2021-11-25 19:53:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:53:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 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 35 [2021-11-25 19:53:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:02,428 INFO L225 Difference]: With dead ends: 496 [2021-11-25 19:53:02,428 INFO L226 Difference]: Without dead ends: 496 [2021-11-25 19:53:02,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=97, Invalid=242, Unknown=3, NotChecked=0, Total=342 [2021-11-25 19:53:02,429 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 158 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:02,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 307 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 180 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2021-11-25 19:53:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-25 19:53:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 417. [2021-11-25 19:53:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 372 states have (on average 1.35752688172043) internal successors, (505), 398 states have internal predecessors, (505), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-25 19:53:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 537 transitions. [2021-11-25 19:53:02,443 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 537 transitions. Word has length 35 [2021-11-25 19:53:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:02,444 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 537 transitions. [2021-11-25 19:53:02,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:53:02,444 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 537 transitions. [2021-11-25 19:53:02,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 19:53:02,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:02,446 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:53:02,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:02,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:02,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:03,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:03,073 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:53:03,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:03,073 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2021-11-25 19:53:03,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:03,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [933717492] [2021-11-25 19:53:03,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:03,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:03,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:03,075 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:03,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-25 19:53:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:03,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:53:03,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:03,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:03,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:03,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:03,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [933717492] [2021-11-25 19:53:03,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [933717492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:53:03,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1031178141] [2021-11-25 19:53:03,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:03,392 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:53:03,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:53:03,393 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:53:03,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-25 19:53:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:03,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:53:03,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:03,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:03,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1031178141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:53:03,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929147101] [2021-11-25 19:53:03,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:03,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:53:03,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:53:03,708 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:53:03,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-25 19:53:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:03,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:53:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:03,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:04,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929147101] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:53:04,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:53:04,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2021-11-25 19:53:04,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445266117] [2021-11-25 19:53:04,020 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:53:04,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:53:04,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:53:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:53:04,022 INFO L87 Difference]: Start difference. First operand 417 states and 537 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:53:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:04,057 INFO L93 Difference]: Finished difference Result 427 states and 543 transitions. [2021-11-25 19:53:04,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:53:04,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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 40 [2021-11-25 19:53:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:04,060 INFO L225 Difference]: With dead ends: 427 [2021-11-25 19:53:04,060 INFO L226 Difference]: Without dead ends: 427 [2021-11-25 19:53:04,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:53:04,061 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 51 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:04,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 113 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:53:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-25 19:53:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 415. [2021-11-25 19:53:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 372 states have (on average 1.3413978494623655) internal successors, (499), 396 states have internal predecessors, (499), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-25 19:53:04,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 531 transitions. [2021-11-25 19:53:04,075 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 531 transitions. Word has length 40 [2021-11-25 19:53:04,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:04,076 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 531 transitions. [2021-11-25 19:53:04,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:53:04,076 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 531 transitions. [2021-11-25 19:53:04,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 19:53:04,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:04,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:53:04,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:04,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:04,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:04,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:53:04,680 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:53:04,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:04,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2021-11-25 19:53:04,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:04,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546488559] [2021-11-25 19:53:04,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:04,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:04,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:04,682 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:04,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-25 19:53:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:04,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:53:04,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:05,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:05,244 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:05,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546488559] [2021-11-25 19:53:05,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546488559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:53:05,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2120296408] [2021-11-25 19:53:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:05,245 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:53:05,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:53:05,246 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:53:05,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-25 19:53:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:05,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:53:05,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:05,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:05,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2120296408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:53:05,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564453738] [2021-11-25 19:53:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:05,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:53:05,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:53:05,644 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:53:05,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-25 19:53:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:05,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:53:05,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:05,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:06,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564453738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:53:06,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:53:06,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2021-11-25 19:53:06,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633402172] [2021-11-25 19:53:06,041 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:53:06,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:53:06,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:06,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:53:06,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:53:06,043 INFO L87 Difference]: Start difference. First operand 415 states and 531 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 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) [2021-11-25 19:53:06,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:06,274 INFO L93 Difference]: Finished difference Result 373 states and 461 transitions. [2021-11-25 19:53:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:53:06,275 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 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 41 [2021-11-25 19:53:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:06,277 INFO L225 Difference]: With dead ends: 373 [2021-11-25 19:53:06,277 INFO L226 Difference]: Without dead ends: 373 [2021-11-25 19:53:06,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:53:06,278 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 87 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:06,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 224 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:53:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-25 19:53:06,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 344. [2021-11-25 19:53:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 308 states have (on average 1.3311688311688312) internal successors, (410), 327 states have internal predecessors, (410), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-25 19:53:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 434 transitions. [2021-11-25 19:53:06,291 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 434 transitions. Word has length 41 [2021-11-25 19:53:06,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:06,291 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 434 transitions. [2021-11-25 19:53:06,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 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) [2021-11-25 19:53:06,292 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 434 transitions. [2021-11-25 19:53:06,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 19:53:06,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:06,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:53:06,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-25 19:53:06,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:06,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:06,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:06,908 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:53:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:06,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2021-11-25 19:53:06,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:06,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880744314] [2021-11-25 19:53:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:06,910 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:06,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:06,910 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:06,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-25 19:53:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:07,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:53:07,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:07,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:53:07,179 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 19:53:07,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-25 19:53:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:07,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:07,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:07,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880744314] [2021-11-25 19:53:07,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880744314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:53:07,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [532395458] [2021-11-25 19:53:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:07,457 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:53:07,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:53:07,458 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:53:07,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-25 19:53:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:07,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:53:07,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:07,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:53:07,860 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-25 19:53:07,860 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 15 treesize of output 20 [2021-11-25 19:53:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:07,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:08,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [532395458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:53:08,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834237560] [2021-11-25 19:53:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:08,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:53:08,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:53:08,103 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:53:08,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-25 19:53:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:08,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:53:08,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:08,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:53:08,330 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:53:08,330 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 23 treesize of output 30 [2021-11-25 19:53:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:08,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:08,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834237560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:53:08,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:53:08,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2021-11-25 19:53:08,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283421712] [2021-11-25 19:53:08,608 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:53:08,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:53:08,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:08,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:53:08,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:53:08,609 INFO L87 Difference]: Start difference. First operand 344 states and 434 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:53:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:08,793 INFO L93 Difference]: Finished difference Result 374 states and 455 transitions. [2021-11-25 19:53:08,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:53:08,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 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 42 [2021-11-25 19:53:08,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:08,796 INFO L225 Difference]: With dead ends: 374 [2021-11-25 19:53:08,796 INFO L226 Difference]: Without dead ends: 374 [2021-11-25 19:53:08,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 230 SyntacticMatches, 14 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:53:08,797 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 34 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:08,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 164 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:53:08,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-25 19:53:08,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 352. [2021-11-25 19:53:08,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 316 states have (on average 1.3227848101265822) internal successors, (418), 335 states have internal predecessors, (418), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-25 19:53:08,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 442 transitions. [2021-11-25 19:53:08,809 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 442 transitions. Word has length 42 [2021-11-25 19:53:08,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:08,809 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 442 transitions. [2021-11-25 19:53:08,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:53:08,810 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 442 transitions. [2021-11-25 19:53:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:53:08,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:08,811 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] [2021-11-25 19:53:08,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:09,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:09,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:09,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:53:09,414 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)] === [2021-11-25 19:53:09,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:09,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1458472979, now seen corresponding path program 1 times [2021-11-25 19:53:09,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:09,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1151620343] [2021-11-25 19:53:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:09,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:09,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:09,416 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:09,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-25 19:53:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:09,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:53:09,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:12,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:53:12,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:53:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:53:12,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:13,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:13,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1151620343] [2021-11-25 19:53:13,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1151620343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:53:13,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1888252613] [2021-11-25 19:53:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:13,119 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:53:13,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:53:13,120 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:53:13,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-25 19:53:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:13,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:53:13,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:16,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:53:16,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:53:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:53:16,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:18,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1888252613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:53:18,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845777238] [2021-11-25 19:53:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:18,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:53:18,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:53:18,733 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:53:18,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-25 19:53:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:18,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:53:18,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:21,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:53:21,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:53:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:53:21,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:22,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845777238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:53:22,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:53:22,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-11-25 19:53:22,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109086452] [2021-11-25 19:53:22,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:53:22,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:53:22,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:22,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:53:22,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=79, Unknown=1, NotChecked=0, Total=110 [2021-11-25 19:53:22,032 INFO L87 Difference]: Start difference. First operand 352 states and 442 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:53:26,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:26,840 INFO L93 Difference]: Finished difference Result 411 states and 485 transitions. [2021-11-25 19:53:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 19:53:26,843 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-11-25 19:53:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:26,845 INFO L225 Difference]: With dead ends: 411 [2021-11-25 19:53:26,845 INFO L226 Difference]: Without dead ends: 411 [2021-11-25 19:53:26,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=127, Invalid=290, Unknown=3, NotChecked=0, Total=420 [2021-11-25 19:53:26,846 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 237 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:26,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 280 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 153 Invalid, 0 Unknown, 47 Unchecked, 0.4s Time] [2021-11-25 19:53:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-25 19:53:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 351. [2021-11-25 19:53:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 315 states have (on average 1.3142857142857143) internal successors, (414), 334 states have internal predecessors, (414), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-25 19:53:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 438 transitions. [2021-11-25 19:53:26,858 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 438 transitions. Word has length 48 [2021-11-25 19:53:26,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:26,859 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 438 transitions. [2021-11-25 19:53:26,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:53:26,859 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 438 transitions. [2021-11-25 19:53:26,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 19:53:26,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:26,861 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] [2021-11-25 19:53:26,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:27,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:27,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:27,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:53:27,472 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:53:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:27,473 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2021-11-25 19:53:27,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:27,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491125092] [2021-11-25 19:53:27,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:27,474 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:27,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:27,474 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:27,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-25 19:53:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:27,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:53:27,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 19:53:27,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:53:27,639 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:27,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491125092] [2021-11-25 19:53:27,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491125092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:53:27,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:53:27,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:53:27,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941069666] [2021-11-25 19:53:27,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:53:27,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:53:27,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:27,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:53:27,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:27,641 INFO L87 Difference]: Start difference. First operand 351 states and 438 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) [2021-11-25 19:53:27,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:27,645 INFO L93 Difference]: Finished difference Result 296 states and 348 transitions. [2021-11-25 19:53:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:53:27,652 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 [2021-11-25 19:53:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:27,654 INFO L225 Difference]: With dead ends: 296 [2021-11-25 19:53:27,654 INFO L226 Difference]: Without dead ends: 296 [2021-11-25 19:53:27,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:53:27,655 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 4 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 106 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 [2021-11-25 19:53:27,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:53:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-25 19:53:27,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 281. [2021-11-25 19:53:27,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 252 states have (on average 1.242063492063492) internal successors, (313), 266 states have internal predecessors, (313), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-25 19:53:27,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 333 transitions. [2021-11-25 19:53:27,665 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 333 transitions. Word has length 47 [2021-11-25 19:53:27,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:27,666 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 333 transitions. [2021-11-25 19:53:27,666 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) [2021-11-25 19:53:27,666 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 333 transitions. [2021-11-25 19:53:27,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:53:27,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:27,668 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-25 19:53:27,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:27,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:27,881 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:53:27,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:27,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1433195828, now seen corresponding path program 1 times [2021-11-25 19:53:27,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:27,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605502468] [2021-11-25 19:53:27,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:27,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:27,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:27,883 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:27,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-25 19:53:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:28,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 19:53:28,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:31,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:53:31,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:53:31,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:53:31,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:53:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:53:31,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:33,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:33,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605502468] [2021-11-25 19:53:33,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605502468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:53:33,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [115656440] [2021-11-25 19:53:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:33,788 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:53:33,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:53:33,788 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:53:33,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-25 19:53:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:34,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:53:34,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:39,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:53:39,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:53:39,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:53:39,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:53:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 19:53:39,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:41,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [115656440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:53:41,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796794211] [2021-11-25 19:53:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:41,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:53:41,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:53:41,738 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:53:41,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-25 19:53:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:41,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:53:41,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:44,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:53:44,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:53:44,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:53:44,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:53:45,015 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:53:45,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:47,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796794211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:53:47,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:53:47,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 7 [2021-11-25 19:53:47,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413785264] [2021-11-25 19:53:47,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:53:47,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:53:47,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:53:47,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:53:47,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=121, Unknown=3, NotChecked=0, Total=156 [2021-11-25 19:53:47,239 INFO L87 Difference]: Start difference. First operand 281 states and 333 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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) [2021-11-25 19:53:53,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:53:53,999 INFO L93 Difference]: Finished difference Result 325 states and 371 transitions. [2021-11-25 19:53:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:53:54,000 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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 50 [2021-11-25 19:53:54,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:53:54,002 INFO L225 Difference]: With dead ends: 325 [2021-11-25 19:53:54,002 INFO L226 Difference]: Without dead ends: 325 [2021-11-25 19:53:54,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 152 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=113, Invalid=301, Unknown=6, NotChecked=0, Total=420 [2021-11-25 19:53:54,004 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 181 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:53:54,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 205 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 159 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2021-11-25 19:53:54,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-25 19:53:54,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 281. [2021-11-25 19:53:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 252 states have (on average 1.2380952380952381) internal successors, (312), 266 states have internal predecessors, (312), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-25 19:53:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 332 transitions. [2021-11-25 19:53:54,014 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 332 transitions. Word has length 50 [2021-11-25 19:53:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:53:54,015 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 332 transitions. [2021-11-25 19:53:54,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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) [2021-11-25 19:53:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 332 transitions. [2021-11-25 19:53:54,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 19:53:54,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:53:54,017 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, 1, 1, 1] [2021-11-25 19:53:54,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2021-11-25 19:53:54,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:54,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-25 19:53:54,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:53:54,620 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:53:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:53:54,620 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2021-11-25 19:53:54,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:53:54,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941290965] [2021-11-25 19:53:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:54,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:53:54,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:53:54,622 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:53:54,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-25 19:53:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:54,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:53:54,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:55,168 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:53:55,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-25 19:53:57,878 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-11-25 19:53:57,878 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 2 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 49 [2021-11-25 19:53:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:57,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:58,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:53:58,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941290965] [2021-11-25 19:53:58,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941290965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:53:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [585618011] [2021-11-25 19:53:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:53:58,146 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:53:58,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:53:58,147 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:53:58,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-11-25 19:53:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:53:58,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:53:58,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:53:58,754 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-25 19:53:58,754 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 24 treesize of output 26 [2021-11-25 19:53:59,066 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:53:59,066 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 21 treesize of output 28 [2021-11-25 19:53:59,190 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-25 19:53:59,191 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 17 treesize of output 26 [2021-11-25 19:53:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:53:59,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:53:59,499 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:53:59,500 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 84 treesize of output 81 [2021-11-25 19:54:01,905 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:54:01,906 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 84 treesize of output 81 [2021-11-25 19:54:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:02,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [585618011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:02,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14168603] [2021-11-25 19:54:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:02,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:02,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:02,430 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:02,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-25 19:54:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:02,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 19:54:02,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:02,773 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:54:02,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 19:54:03,042 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:54:03,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-25 19:54:03,182 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-25 19:54:03,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 25 [2021-11-25 19:54:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:03,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:03,437 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:54:03,437 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 153 treesize of output 148 [2021-11-25 19:54:08,164 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:54:08,164 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 163 treesize of output 158 [2021-11-25 19:54:08,484 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:08,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14168603] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:08,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2021-11-25 19:54:08,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 8, 9] total 27 [2021-11-25 19:54:08,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85076311] [2021-11-25 19:54:08,485 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:08,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 19:54:08,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:54:08,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 19:54:08,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=716, Unknown=3, NotChecked=0, Total=870 [2021-11-25 19:54:08,487 INFO L87 Difference]: Start difference. First operand 281 states and 332 transitions. Second operand has 29 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-25 19:54:09,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:09,961 INFO L93 Difference]: Finished difference Result 308 states and 347 transitions. [2021-11-25 19:54:09,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-25 19:54:09,962 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 51 [2021-11-25 19:54:09,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:09,964 INFO L225 Difference]: With dead ends: 308 [2021-11-25 19:54:09,964 INFO L226 Difference]: Without dead ends: 308 [2021-11-25 19:54:09,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 217 SyntacticMatches, 15 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=316, Invalid=1163, Unknown=3, NotChecked=0, Total=1482 [2021-11-25 19:54:09,966 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 415 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:09,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 400 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 202 Invalid, 0 Unknown, 155 Unchecked, 0.6s Time] [2021-11-25 19:54:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-25 19:54:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 288. [2021-11-25 19:54:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 262 states have (on average 1.2061068702290076) internal successors, (316), 273 states have internal predecessors, (316), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-25 19:54:09,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 335 transitions. [2021-11-25 19:54:09,977 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 335 transitions. Word has length 51 [2021-11-25 19:54:09,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:09,978 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 335 transitions. [2021-11-25 19:54:09,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-25 19:54:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 335 transitions. [2021-11-25 19:54:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 19:54:09,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:09,979 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, 1, 1, 1] [2021-11-25 19:54:09,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:10,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:10,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:10,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:10,583 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:54:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:10,583 INFO L85 PathProgramCache]: Analyzing trace with hash -563187968, now seen corresponding path program 1 times [2021-11-25 19:54:10,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:54:10,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256873674] [2021-11-25 19:54:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:10,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:54:10,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:54:10,585 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:54:10,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-25 19:54:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:10,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:54:10,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:13,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:54:13,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:54:15,525 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:54:15,526 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 20 treesize of output 20 [2021-11-25 19:54:16,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:54:16,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:54:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:16,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:16,740 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:54:16,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 19:54:19,527 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:54:19,528 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 16 [2021-11-25 19:54:22,164 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:54:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256873674] [2021-11-25 19:54:22,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256873674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [403942807] [2021-11-25 19:54:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:22,165 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:54:22,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:54:22,166 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:54:22,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-11-25 19:54:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:22,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:54:22,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:24,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:54:24,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:54:25,199 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:54:25,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 19:54:25,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:54:25,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:54:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:25,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:26,202 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:54:26,202 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 16 [2021-11-25 19:54:28,817 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:54:28,817 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 16 [2021-11-25 19:54:29,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [403942807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:29,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939961520] [2021-11-25 19:54:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:29,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:29,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:29,374 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:29,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-25 19:54:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:29,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:54:29,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:54:29,983 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 14 treesize of output 16 [2021-11-25 19:54:30,004 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:54:30,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-25 19:54:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:54:30,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:54:30,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939961520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:30,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:54:30,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 14 [2021-11-25 19:54:30,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998359898] [2021-11-25 19:54:30,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:30,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:54:30,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:54:30,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:54:30,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=322, Unknown=4, NotChecked=0, Total=420 [2021-11-25 19:54:30,413 INFO L87 Difference]: Start difference. First operand 288 states and 335 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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) [2021-11-25 19:54:30,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:30,760 INFO L93 Difference]: Finished difference Result 343 states and 386 transitions. [2021-11-25 19:54:30,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:54:30,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 51 [2021-11-25 19:54:30,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:30,763 INFO L225 Difference]: With dead ends: 343 [2021-11-25 19:54:30,763 INFO L226 Difference]: Without dead ends: 343 [2021-11-25 19:54:30,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 181 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=107, Invalid=351, Unknown=4, NotChecked=0, Total=462 [2021-11-25 19:54:30,764 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 171 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:30,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 97 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:54:30,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-25 19:54:30,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 288. [2021-11-25 19:54:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 262 states have (on average 1.1946564885496183) internal successors, (313), 273 states have internal predecessors, (313), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-25 19:54:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 332 transitions. [2021-11-25 19:54:30,775 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 332 transitions. Word has length 51 [2021-11-25 19:54:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:30,775 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 332 transitions. [2021-11-25 19:54:30,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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) [2021-11-25 19:54:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 332 transitions. [2021-11-25 19:54:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:54:30,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:30,777 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:30,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:31,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:31,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:31,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:54:31,392 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:54:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:31,393 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2021-11-25 19:54:31,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:54:31,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061652468] [2021-11-25 19:54:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:31,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:54:31,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:54:31,394 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:54:31,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-25 19:54:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:31,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:54:31,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 19:54:31,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 19:54:32,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:54:32,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061652468] [2021-11-25 19:54:32,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061652468] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:32,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [429336588] [2021-11-25 19:54:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:32,331 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:54:32,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:54:32,338 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:54:32,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2021-11-25 19:54:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:32,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:54:32,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 19:54:32,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 19:54:33,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [429336588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:33,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234818651] [2021-11-25 19:54:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:33,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:33,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:33,288 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:33,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-25 19:54:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:33,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:54:33,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 19:54:33,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 19:54:34,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234818651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:34,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:54:34,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2021-11-25 19:54:34,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588224836] [2021-11-25 19:54:34,131 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:34,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:54:34,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:54:34,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:54:34,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:54:34,132 INFO L87 Difference]: Start difference. First operand 288 states and 332 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:54:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:34,818 INFO L93 Difference]: Finished difference Result 299 states and 339 transitions. [2021-11-25 19:54:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:54:34,819 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2021-11-25 19:54:34,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:34,820 INFO L225 Difference]: With dead ends: 299 [2021-11-25 19:54:34,820 INFO L226 Difference]: Without dead ends: 299 [2021-11-25 19:54:34,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:54:34,821 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 281 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:34,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 208 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:54:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-25 19:54:34,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 287. [2021-11-25 19:54:34,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 262 states have (on average 1.1793893129770991) internal successors, (309), 272 states have internal predecessors, (309), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-25 19:54:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 328 transitions. [2021-11-25 19:54:34,830 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 328 transitions. Word has length 52 [2021-11-25 19:54:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:34,830 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 328 transitions. [2021-11-25 19:54:34,831 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:54:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 328 transitions. [2021-11-25 19:54:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:54:34,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:34,832 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1] [2021-11-25 19:54:34,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:35,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:35,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-25 19:54:35,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:35,435 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:54:35,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:35,435 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2021-11-25 19:54:35,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:54:35,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703521420] [2021-11-25 19:54:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:35,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:54:35,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:54:35,437 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:54:35,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-25 19:54:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:35,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:54:35,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:36,011 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:54:36,011 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 20 treesize of output 27 [2021-11-25 19:54:39,008 INFO L354 Elim1Store]: treesize reduction 34, result has 49.3 percent of original size [2021-11-25 19:54:39,008 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 2 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 59 [2021-11-25 19:54:39,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:54:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:39,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:39,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:54:39,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703521420] [2021-11-25 19:54:39,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703521420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:39,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1052849203] [2021-11-25 19:54:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:39,599 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:54:39,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:54:39,600 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:54:39,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2021-11-25 19:54:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:39,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 19:54:39,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:40,392 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-25 19:54:40,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 47 [2021-11-25 19:54:43,433 INFO L354 Elim1Store]: treesize reduction 49, result has 47.9 percent of original size [2021-11-25 19:54:43,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 53 treesize of output 81 [2021-11-25 19:54:43,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:54:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:43,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:44,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1052849203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:44,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513635818] [2021-11-25 19:54:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:44,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:44,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:44,214 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:44,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-25 19:54:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:44,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 19:54:44,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:44,906 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:54:44,906 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 14 treesize of output 14 [2021-11-25 19:54:45,569 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-25 19:54:45,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 36 [2021-11-25 19:54:45,830 INFO L354 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2021-11-25 19:54:45,830 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 21 treesize of output 34 [2021-11-25 19:54:46,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:54:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:46,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:46,482 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-25 19:54:46,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 110 [2021-11-25 19:54:49,280 INFO L354 Elim1Store]: treesize reduction -1, result has 103.0 percent of original size [2021-11-25 19:54:49,280 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 3 case distinctions, treesize of input 103 treesize of output 126 [2021-11-25 19:54:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:50,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513635818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:50,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-25 19:54:50,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12, 13] total 39 [2021-11-25 19:54:50,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686173005] [2021-11-25 19:54:50,400 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:50,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 19:54:50,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:54:50,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 19:54:50,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1501, Unknown=2, NotChecked=0, Total=1722 [2021-11-25 19:54:50,403 INFO L87 Difference]: Start difference. First operand 287 states and 328 transitions. Second operand has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-25 19:55:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:55:04,175 INFO L93 Difference]: Finished difference Result 352 states and 388 transitions. [2021-11-25 19:55:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-25 19:55:04,175 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 52 [2021-11-25 19:55:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:55:04,177 INFO L225 Difference]: With dead ends: 352 [2021-11-25 19:55:04,177 INFO L226 Difference]: Without dead ends: 352 [2021-11-25 19:55:04,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 174 SyntacticMatches, 23 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=802, Invalid=3884, Unknown=6, NotChecked=0, Total=4692 [2021-11-25 19:55:04,179 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 663 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:55:04,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 765 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 695 Invalid, 0 Unknown, 277 Unchecked, 1.7s Time] [2021-11-25 19:55:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-25 19:55:04,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 307. [2021-11-25 19:55:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 282 states have (on average 1.173758865248227) internal successors, (331), 292 states have internal predecessors, (331), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-25 19:55:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 350 transitions. [2021-11-25 19:55:04,188 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 350 transitions. Word has length 52 [2021-11-25 19:55:04,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:55:04,189 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 350 transitions. [2021-11-25 19:55:04,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-25 19:55:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 350 transitions. [2021-11-25 19:55:04,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 19:55:04,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:55:04,191 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:55:04,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-25 19:55:04,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-11-25 19:55:04,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2021-11-25 19:55:04,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:55:04,804 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:55:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:55:04,805 INFO L85 PathProgramCache]: Analyzing trace with hash -57759457, now seen corresponding path program 1 times [2021-11-25 19:55:04,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:55:04,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079694277] [2021-11-25 19:55:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:55:04,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:55:04,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:55:04,806 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:55:04,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-11-25 19:55:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:55:04,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 19:55:04,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:55:05,575 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:55:05,575 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 [2021-11-25 19:55:06,224 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 19:55:06,225 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 [2021-11-25 19:55:06,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:55:06,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:06,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 19:55:07,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:55:07,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:55:07,411 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:55:07,415 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 14 treesize of output 14 [2021-11-25 19:55:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:55:07,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:55:08,057 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 23 treesize of output 17 [2021-11-25 19:55:08,084 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-25 19:55:08,084 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 [2021-11-25 19:55:08,182 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:55:08,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079694277] [2021-11-25 19:55:08,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079694277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:55:08,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1226361419] [2021-11-25 19:55:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:55:08,182 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:55:08,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:55:08,183 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:55:08,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2021-11-25 19:55:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:55:08,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 19:55:08,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:55:08,946 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:55:08,947 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 [2021-11-25 19:55:09,373 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 19:55:09,373 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 [2021-11-25 19:55:09,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:55:09,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:09,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 19:55:10,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:55:10,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:55:10,370 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:55:10,370 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 14 treesize of output 14 [2021-11-25 19:55:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:55:10,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:55:10,637 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 23 treesize of output 17 [2021-11-25 19:55:10,668 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-25 19:55:10,668 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 [2021-11-25 19:55:10,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1226361419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:55:10,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864008571] [2021-11-25 19:55:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:55:10,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:55:10,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:55:10,763 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:55:10,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-25 19:55:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:55:10,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:55:10,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:55:11,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:55:11,632 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 17 treesize of output 19 [2021-11-25 19:55:11,650 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 19:55:11,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 19:55:12,022 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 [2021-11-25 19:55:12,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:55:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:55:12,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:55:12,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:55:12,540 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 23 treesize of output 11 [2021-11-25 19:55:12,560 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 14 treesize of output 10 [2021-11-25 19:55:15,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:55:15,137 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 43 treesize of output 47 [2021-11-25 19:55:15,386 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:55:15,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 19:55:15,516 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-25 19:55:15,517 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 [2021-11-25 19:55:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:55:15,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864008571] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:55:15,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-25 19:55:15,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 8, 10] total 34 [2021-11-25 19:55:15,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141473787] [2021-11-25 19:55:15,655 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-25 19:55:15,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-25 19:55:15,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:55:15,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-25 19:55:15,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1286, Unknown=1, NotChecked=0, Total=1482 [2021-11-25 19:55:15,657 INFO L87 Difference]: Start difference. First operand 307 states and 350 transitions. Second operand has 35 states, 33 states have (on average 4.454545454545454) internal successors, (147), 31 states have internal predecessors, (147), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 19:56:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:02,444 INFO L93 Difference]: Finished difference Result 336 states and 371 transitions. [2021-11-25 19:56:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-25 19:56:02,445 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 4.454545454545454) internal successors, (147), 31 states have internal predecessors, (147), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2021-11-25 19:56:02,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:02,447 INFO L225 Difference]: With dead ends: 336 [2021-11-25 19:56:02,447 INFO L226 Difference]: Without dead ends: 336 [2021-11-25 19:56:02,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 199 SyntacticMatches, 12 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2199 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=1440, Invalid=5856, Unknown=14, NotChecked=0, Total=7310 [2021-11-25 19:56:02,449 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 789 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 680 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:02,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 636 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 456 Invalid, 0 Unknown, 680 Unchecked, 1.1s Time] [2021-11-25 19:56:02,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-25 19:56:02,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 309. [2021-11-25 19:56:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 284 states have (on average 1.1690140845070423) internal successors, (332), 294 states have internal predecessors, (332), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-25 19:56:02,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 350 transitions. [2021-11-25 19:56:02,467 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 350 transitions. Word has length 53 [2021-11-25 19:56:02,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:02,467 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 350 transitions. [2021-11-25 19:56:02,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 4.454545454545454) internal successors, (147), 31 states have internal predecessors, (147), 7 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 19:56:02,468 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 350 transitions. [2021-11-25 19:56:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 19:56:02,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:02,471 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:02,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-25 19:56:02,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2021-11-25 19:56:02,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2021-11-25 19:56:03,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:56:03,085 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:56:03,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:03,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2021-11-25 19:56:03,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:56:03,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040013098] [2021-11-25 19:56:03,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:03,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:56:03,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:56:03,086 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:56:03,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2021-11-25 19:56:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:03,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:56:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:56:03,449 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:56:03,450 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 24 treesize of output 31 [2021-11-25 19:56:05,940 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-25 19:56:05,940 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 5 case distinctions, treesize of input 35 treesize of output 49 [2021-11-25 19:56:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:06,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:56:06,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:56:06,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040013098] [2021-11-25 19:56:06,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040013098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:56:06,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [608018230] [2021-11-25 19:56:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:06,301 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:56:06,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:56:06,302 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:56:06,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2021-11-25 19:56:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:06,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:56:06,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:56:10,936 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:56:10,937 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 23 treesize of output 30 [2021-11-25 19:56:17,603 INFO L354 Elim1Store]: treesize reduction 18, result has 53.8 percent of original size [2021-11-25 19:56:17,603 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 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-25 19:56:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:17,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:56:19,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [608018230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:56:19,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713525485] [2021-11-25 19:56:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:19,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:56:19,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:56:19,866 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:56:19,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-25 19:56:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:56:19,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:56:22,141 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:56:22,142 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 26 treesize of output 33 [2021-11-25 19:56:24,882 INFO L354 Elim1Store]: treesize reduction 24, result has 61.9 percent of original size [2021-11-25 19:56:24,882 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 4 case distinctions, treesize of input 141 treesize of output 169 [2021-11-25 19:56:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:25,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:56:29,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713525485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:56:29,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:56:29,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2021-11-25 19:56:29,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941666826] [2021-11-25 19:56:29,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:56:29,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 19:56:29,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:56:29,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 19:56:29,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=379, Unknown=9, NotChecked=0, Total=462 [2021-11-25 19:56:29,559 INFO L87 Difference]: Start difference. First operand 309 states and 350 transitions. Second operand has 18 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 19:56:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:46,682 INFO L93 Difference]: Finished difference Result 336 states and 372 transitions. [2021-11-25 19:56:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:56:46,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2021-11-25 19:56:46,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:46,684 INFO L225 Difference]: With dead ends: 336 [2021-11-25 19:56:46,685 INFO L226 Difference]: Without dead ends: 336 [2021-11-25 19:56:46,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 151 SyntacticMatches, 14 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=142, Invalid=716, Unknown=12, NotChecked=0, Total=870 [2021-11-25 19:56:46,686 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 177 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:46,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 558 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 304 Unchecked, 0.1s Time] [2021-11-25 19:56:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-25 19:56:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 298. [2021-11-25 19:56:46,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 274 states have (on average 1.1605839416058394) internal successors, (318), 283 states have internal predecessors, (318), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-25 19:56:46,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 335 transitions. [2021-11-25 19:56:46,694 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 335 transitions. Word has length 54 [2021-11-25 19:56:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:46,695 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 335 transitions. [2021-11-25 19:56:46,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-25 19:56:46,695 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 335 transitions. [2021-11-25 19:56:46,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 19:56:46,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:46,696 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:46,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2021-11-25 19:56:46,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-25 19:56:47,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2021-11-25 19:56:47,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:56:47,300 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)] === [2021-11-25 19:56:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:47,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1889386740, now seen corresponding path program 2 times [2021-11-25 19:56:47,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:56:47,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435670448] [2021-11-25 19:56:47,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:56:47,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:56:47,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:56:47,303 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:56:47,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2021-11-25 19:56:47,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:56:47,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:56:47,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 19:56:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:56:50,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:56:50,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:56:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:56:50,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:56:51,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:56:51,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435670448] [2021-11-25 19:56:51,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435670448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:56:51,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1780242703] [2021-11-25 19:56:51,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:56:51,487 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:56:51,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:56:51,488 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:56:51,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2021-11-25 19:56:51,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:56:51,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:56:51,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:56:51,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:56:54,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:56:54,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:56:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:56:54,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:56:57,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1780242703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:56:57,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764124001] [2021-11-25 19:56:57,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:56:57,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:56:57,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:56:57,256 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:56:57,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-25 19:56:57,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:56:57,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:56:57,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:56:57,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:57:00,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:57:00,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:57:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:57:00,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:57:01,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764124001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:57:01,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:57:01,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2021-11-25 19:57:01,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583968789] [2021-11-25 19:57:01,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:57:01,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:57:01,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:57:01,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:57:01,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=117, Unknown=1, NotChecked=0, Total=156 [2021-11-25 19:57:01,070 INFO L87 Difference]: Start difference. First operand 298 states and 335 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:57:05,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:57:05,961 INFO L93 Difference]: Finished difference Result 344 states and 376 transitions. [2021-11-25 19:57:05,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 19:57:05,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2021-11-25 19:57:05,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:57:05,963 INFO L225 Difference]: With dead ends: 344 [2021-11-25 19:57:05,963 INFO L226 Difference]: Without dead ends: 344 [2021-11-25 19:57:05,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 188 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=166, Invalid=431, Unknown=3, NotChecked=0, Total=600 [2021-11-25 19:57:05,964 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 265 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:57:05,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 220 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 148 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2021-11-25 19:57:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-25 19:57:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 257. [2021-11-25 19:57:05,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 235 states have (on average 1.1531914893617021) internal successors, (271), 244 states have internal predecessors, (271), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-25 19:57:05,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 286 transitions. [2021-11-25 19:57:05,972 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 286 transitions. Word has length 56 [2021-11-25 19:57:05,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:57:05,973 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 286 transitions. [2021-11-25 19:57:05,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:57:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 286 transitions. [2021-11-25 19:57:05,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 19:57:05,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:57:05,974 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:57:05,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2021-11-25 19:57:06,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (74)] Ended with exit code 0 [2021-11-25 19:57:06,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-25 19:57:06,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:57:06,587 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:57:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:57:06,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1842875129, now seen corresponding path program 1 times [2021-11-25 19:57:06,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:57:06,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590861425] [2021-11-25 19:57:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:57:06,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:57:06,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:57:06,589 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:57:06,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2021-11-25 19:57:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:57:06,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:57:06,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:57:07,152 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:57:07,152 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 [2021-11-25 19:57:07,509 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:57:07,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 19:57:07,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:57:08,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:57:08,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 19:57:08,421 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:57:08,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 19:57:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:57:08,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:57:09,936 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:57:09,937 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 16 [2021-11-25 19:57:10,005 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 14 treesize of output 12 [2021-11-25 19:57:10,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:57:10,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590861425] [2021-11-25 19:57:10,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590861425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:57:10,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [884038933] [2021-11-25 19:57:10,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:57:10,115 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:57:10,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:57:10,116 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:57:10,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2021-11-25 19:57:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:57:10,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 19:57:10,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:57:10,761 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:57:10,761 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 [2021-11-25 19:57:11,039 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:57:11,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 19:57:11,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:57:11,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:57:11,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 19:57:11,712 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:57:11,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 19:57:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:57:11,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:57:12,523 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:57:12,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2021-11-25 19:57:12,590 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 15 treesize of output 13 [2021-11-25 19:57:12,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [884038933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:57:12,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730186928] [2021-11-25 19:57:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:57:12,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:57:12,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:57:12,691 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:57:12,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-25 19:57:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:57:12,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 19:57:12,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:57:19,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:57:19,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:57:22,063 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:57:22,063 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 21 [2021-11-25 19:57:22,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-25 19:57:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:57:22,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:57:23,551 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:57:23,552 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 16 [2021-11-25 19:57:23,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730186928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:57:23,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:57:23,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 20 [2021-11-25 19:57:23,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798081593] [2021-11-25 19:57:23,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:57:23,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 19:57:23,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:57:23,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 19:57:23,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=694, Unknown=2, NotChecked=0, Total=812 [2021-11-25 19:57:23,792 INFO L87 Difference]: Start difference. First operand 257 states and 286 transitions. Second operand has 22 states, 20 states have (on average 5.0) internal successors, (100), 19 states have internal predecessors, (100), 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) [2021-11-25 19:58:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:02,176 INFO L93 Difference]: Finished difference Result 373 states and 414 transitions. [2021-11-25 19:58:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 19:58:02,177 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 5.0) internal successors, (100), 19 states have internal predecessors, (100), 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 59 [2021-11-25 19:58:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:02,179 INFO L225 Difference]: With dead ends: 373 [2021-11-25 19:58:02,179 INFO L226 Difference]: Without dead ends: 373 [2021-11-25 19:58:02,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 180 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=351, Invalid=1701, Unknown=18, NotChecked=0, Total=2070 [2021-11-25 19:58:02,181 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 321 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 424 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:02,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 487 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 199 Invalid, 0 Unknown, 424 Unchecked, 0.5s Time] [2021-11-25 19:58:02,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-25 19:58:02,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 254. [2021-11-25 19:58:02,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 235 states have (on average 1.1404255319148937) internal successors, (268), 241 states have internal predecessors, (268), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-25 19:58:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 283 transitions. [2021-11-25 19:58:02,189 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 283 transitions. Word has length 59 [2021-11-25 19:58:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:02,189 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 283 transitions. [2021-11-25 19:58:02,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 5.0) internal successors, (100), 19 states have internal predecessors, (100), 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) [2021-11-25 19:58:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 283 transitions. [2021-11-25 19:58:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 19:58:02,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:02,190 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:02,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (77)] Forceful destruction successful, exit code 0 [2021-11-25 19:58:02,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-25 19:58:02,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2021-11-25 19:58:02,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:58:02,791 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:58:02,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:02,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1294554201, now seen corresponding path program 1 times [2021-11-25 19:58:02,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:58:02,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346606452] [2021-11-25 19:58:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:02,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:58:02,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:58:02,794 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:58:02,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2021-11-25 19:58:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:02,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 19:58:02,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:03,505 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:58:03,505 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 21 treesize of output 28 [2021-11-25 19:58:06,370 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-25 19:58:06,370 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 5 case distinctions, treesize of input 35 treesize of output 49 [2021-11-25 19:58:06,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:58:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:06,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:07,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:58:07,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346606452] [2021-11-25 19:58:07,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346606452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:07,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [81584263] [2021-11-25 19:58:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:07,357 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:58:07,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:58:07,357 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:58:07,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2021-11-25 19:58:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:07,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 19:58:07,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:10,531 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-25 19:58:10,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 48 [2021-11-25 19:58:17,662 INFO L354 Elim1Store]: treesize reduction 29, result has 50.0 percent of original size [2021-11-25 19:58:17,663 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 3 case distinctions, treesize of input 32 treesize of output 52 [2021-11-25 19:58:18,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:58:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:18,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:20,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [81584263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:20,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445435628] [2021-11-25 19:58:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:20,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:20,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:20,794 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:58:20,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-25 19:58:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:20,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:58:20,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:23,331 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 19:58:23,332 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 23 treesize of output 30 [2021-11-25 19:58:28,164 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-11-25 19:58:28,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 49 [2021-11-25 19:58:28,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:58:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:28,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:33,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445435628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:33,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:58:33,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-11-25 19:58:33,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453945911] [2021-11-25 19:58:33,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:58:33,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 19:58:33,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:58:33,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 19:58:33,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=744, Unknown=8, NotChecked=0, Total=870 [2021-11-25 19:58:33,549 INFO L87 Difference]: Start difference. First operand 254 states and 283 transitions. Second operand has 23 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 19:58:44,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:44,850 INFO L93 Difference]: Finished difference Result 392 states and 437 transitions. [2021-11-25 19:58:44,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:58:44,851 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2021-11-25 19:58:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:44,853 INFO L225 Difference]: With dead ends: 392 [2021-11-25 19:58:44,854 INFO L226 Difference]: Without dead ends: 392 [2021-11-25 19:58:44,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 181 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=226, Invalid=1323, Unknown=11, NotChecked=0, Total=1560 [2021-11-25 19:58:44,855 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 143 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:44,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 387 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 194 Invalid, 0 Unknown, 208 Unchecked, 0.5s Time] [2021-11-25 19:58:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-25 19:58:44,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 316. [2021-11-25 19:58:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 292 states have (on average 1.1404109589041096) internal successors, (333), 299 states have internal predecessors, (333), 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) [2021-11-25 19:58:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 356 transitions. [2021-11-25 19:58:44,865 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 356 transitions. Word has length 60 [2021-11-25 19:58:44,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:44,866 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 356 transitions. [2021-11-25 19:58:44,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-25 19:58:44,866 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 356 transitions. [2021-11-25 19:58:44,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 19:58:44,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:44,867 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:44,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2021-11-25 19:58:45,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2021-11-25 19:58:45,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-11-25 19:58:45,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:45,481 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:58:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:45,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1476474522, now seen corresponding path program 1 times [2021-11-25 19:58:45,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:58:45,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616075834] [2021-11-25 19:58:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:45,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:58:45,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:58:45,483 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:58:45,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2021-11-25 19:58:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:45,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 19:58:45,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:46,240 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:58:46,240 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 [2021-11-25 19:58:46,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:58:47,100 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:58:47,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-11-25 19:58:49,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:58:49,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:58:49,717 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:58:49,718 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 14 treesize of output 14 [2021-11-25 19:58:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:49,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:50,512 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 28 treesize of output 20 [2021-11-25 19:58:50,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:58:50,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616075834] [2021-11-25 19:58:50,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616075834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:50,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [907878588] [2021-11-25 19:58:50,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:50,621 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:58:50,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:58:50,622 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:58:50,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2021-11-25 19:58:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:51,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 19:58:51,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:51,517 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:58:51,518 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 [2021-11-25 19:58:51,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:58:52,118 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:58:52,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-11-25 19:58:54,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:58:54,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:58:54,369 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:58:54,369 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 14 treesize of output 14 [2021-11-25 19:58:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:54,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:54,777 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 28 treesize of output 20 [2021-11-25 19:58:54,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [907878588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:54,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921677928] [2021-11-25 19:58:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:54,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:54,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:54,904 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:58:54,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-25 19:58:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:55,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 19:58:55,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:56,137 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:58:56,137 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 [2021-11-25 19:58:56,183 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:58:56,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-25 19:58:56,917 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:58:56,917 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 [2021-11-25 19:58:57,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:58:57,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 19:58:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:58,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:58,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921677928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:58,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:58:58,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 22 [2021-11-25 19:58:58,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235759136] [2021-11-25 19:58:58,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:58:58,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-25 19:58:58,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:58:58,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-25 19:58:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 19:58:58,831 INFO L87 Difference]: Start difference. First operand 316 states and 356 transitions. Second operand has 24 states, 21 states have (on average 4.714285714285714) internal successors, (99), 19 states have internal predecessors, (99), 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) [2021-11-25 19:59:08,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:08,361 INFO L93 Difference]: Finished difference Result 379 states and 423 transitions. [2021-11-25 19:59:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 19:59:08,362 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 4.714285714285714) internal successors, (99), 19 states have internal predecessors, (99), 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 61 [2021-11-25 19:59:08,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:08,363 INFO L225 Difference]: With dead ends: 379 [2021-11-25 19:59:08,364 INFO L226 Difference]: Without dead ends: 379 [2021-11-25 19:59:08,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 192 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=290, Invalid=1868, Unknown=4, NotChecked=0, Total=2162 [2021-11-25 19:59:08,365 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 305 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 567 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:08,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 500 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 87 Invalid, 0 Unknown, 567 Unchecked, 0.3s Time] [2021-11-25 19:59:08,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-25 19:59:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 326. [2021-11-25 19:59:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 302 states have (on average 1.1390728476821192) internal successors, (344), 309 states have internal predecessors, (344), 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) [2021-11-25 19:59:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 367 transitions. [2021-11-25 19:59:08,373 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 367 transitions. Word has length 61 [2021-11-25 19:59:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:08,373 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 367 transitions. [2021-11-25 19:59:08,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 4.714285714285714) internal successors, (99), 19 states have internal predecessors, (99), 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) [2021-11-25 19:59:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 367 transitions. [2021-11-25 19:59:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-25 19:59:08,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:08,375 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:08,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (83)] Ended with exit code 0 [2021-11-25 19:59:08,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:08,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:08,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:59:08,978 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-25 19:59:08,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:08,979 INFO L85 PathProgramCache]: Analyzing trace with hash 785046953, now seen corresponding path program 1 times [2021-11-25 19:59:08,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:59:08,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218315470] [2021-11-25 19:59:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:08,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:59:08,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:59:08,980 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:59:08,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2021-11-25 19:59:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:09,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:59:09,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:09,804 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 22 treesize of output 10 [2021-11-25 19:59:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:09,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:10,364 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 24 treesize of output 12 [2021-11-25 19:59:10,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:59:10,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218315470] [2021-11-25 19:59:10,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218315470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:10,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1319972546] [2021-11-25 19:59:10,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:10,425 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:59:10,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:59:10,430 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:59:10,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2021-11-25 19:59:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:10,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 19:59:10,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:11,393 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 [2021-11-25 19:59:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:59:11,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:59:11,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1319972546] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:11,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:59:11,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 5] total 20 [2021-11-25 19:59:11,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39876501] [2021-11-25 19:59:11,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:11,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:59:11,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:59:11,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:59:11,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:59:11,661 INFO L87 Difference]: Start difference. First operand 326 states and 367 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 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) [2021-11-25 19:59:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:12,002 INFO L93 Difference]: Finished difference Result 340 states and 371 transitions. [2021-11-25 19:59:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:59:12,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 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 63 [2021-11-25 19:59:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:12,004 INFO L225 Difference]: With dead ends: 340 [2021-11-25 19:59:12,004 INFO L226 Difference]: Without dead ends: 340 [2021-11-25 19:59:12,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-11-25 19:59:12,005 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 119 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:12,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 87 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:59:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-25 19:59:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 313. [2021-11-25 19:59:12,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 290 states have (on average 1.106896551724138) internal successors, (321), 296 states have internal predecessors, (321), 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) [2021-11-25 19:59:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 344 transitions. [2021-11-25 19:59:12,013 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 344 transitions. Word has length 63 [2021-11-25 19:59:12,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:12,013 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 344 transitions. [2021-11-25 19:59:12,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 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) [2021-11-25 19:59:12,013 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 344 transitions. [2021-11-25 19:59:12,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 19:59:12,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:12,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:12,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a7f78d5-36ce-45f4-b2f1-a4779f857c0e/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (86)] Ended with exit code 0